Fronius Symo GEN24 6 - 10 kW / 6 - 10 kW Plus Operating instructions

Please pay special attention when one of the symbols from the "Safety rules" chapter appears in these instructions.

1. General information

Please pay special attention when one of the symbols from the "Safety rules" chapter appears in these instructions.

1. General information
2. Safety information

Please pay special attention when one of the symbols from the "Safety rules" chapter appears in these instructions.

1. General information
2. Safety information

1. General information
2. Safety information

• Serious or fatal injury to the operator or third parties
• Damage to the device and other material assets belonging to the operating company

• Be suitably qualified
• Have knowledge of and experience in dealing with electrical installations
• Have fully read and precisely followed these operating instructions

In addition to the operating instructions, all applicable local regulations regarding accident prevention and environmental protection must also be followed.

• Must be kept in a legible state
• Must not be damaged
• Must not be removed
• Must not be covered, have anything stuck on them, or painted over

• Serious or fatal injury to the operator or third parties
• Damage to the device and other material assets belonging to the operating company

Any safety devices that are not fully functional must be repaired by an authorized specialist before the device is switched on.

Never bypass or disable safety devices.

For the location of the safety and danger notices on the device, refer to the chapter headed "Information on the device" in the operating instructions for your device.

Any equipment malfunctions which impair safety must be remedied before the device is turned on.

1. General information
2. Safety information

Operation or storage of the device outside the stipulated area will be deemed as not in accordance with the intended purpose. The manufacturer accepts no liability for any damage resulting from improper use.

1. General information
2. Safety information

During operation, due to the high electrical voltages and currents, local electromagnetic fields (EMF) occur in the environment around the inverter and the Fronius system components as well as in the area of the PV modules including the supply lines.

In the case of exposure to humans, the required limit values are observed when the products are used in line with the intended use and the recommended distance of at least 20 cm is observed.

If these limit values are complied with, according to current scientific knowledge, no health-endangering effects from EMF exposure are to be expected. If wearers of prostheses (implants, metal parts in and on the body) as well as active physical aids (pacemakers, insulin pumps, hearing aids, etc.) are in the vicinity of components of the PV system, they must consult with the responsible doctor regarding possible health risks.

1. General information
2. Safety information

The sound pressure level of the inverter is indicated in the Technical data.

The cooling of the device takes place via an electronic temperature control system at the lowest possible noise level and depends on the power used, ambient temperature, and the soiling level of the device, etc.

It is not possible to provide a workplace-related emission value for this device, because the actual sound pressure level is heavily influenced by the installation situation, the power quality, the surrounding walls, and the properties of the room in general.

1. General information
2. Safety information

In certain cases, even though a device complies with the standard limit values for emissions, it may affect the application area for which it was designed (e.g., when there is equipment that is susceptible to interference at the same location or if the site where the device is installed is close to either radio or television receivers). If this is the case, the operator is obliged to take action to rectify the situation.

1. General information
2. Safety information

This system has backup power functions, which enable a replacement power supply to be established in the event of a failure of the public grid.

Where an automatic backup power supply is installed, a backup power warning notice (https://www.fronius.com/en/search-page, item number: 42,0409,0275) must be fitted on the electrical distributor.

Maintenance and installation work in the home network requires both disconnection on the utility side and deactivation of the replacement power mode by opening the integrated DC disconnector on the inverter.

The function of the residual current devices for the backup power supply must be checked at regular intervals (according to the manufacturer's instructions), but at least twice a year.
A description on how to perform the test operation can be found in the backup power checklist (https://www.fronius.com/en/search-page, item number: 42,0426,0365).

Depending on the insolation conditions and the battery state of charge, the backup power supply is automatically deactivated and activated. This can cause the backup power supply to unexpectedly return from standby mode. Therefore, installation work can only be performed on the home network when the backup power supply is deactivated.

Influencing factors on the total power in backup power mode:

Reactive power
Electrical loads with a power factor not equal to 1 also require reactive power in addition to effective power. The reactive power also loads the inverter. Therefore, to correctly calculate the actual total power, it is not the rated power of the load that is relevant, but the current caused by effective and reactive power.

Devices with a high reactive power are mainly electric motors such as:

• Water pumps
• Circular saws
• Blowers and fans

High starting current
Electrical loads that need to accelerate a large mass usually require a high starting current. This can be up to 10 times higher than the nominal current. The maximum current of the inverter is available for the starting current. Loads with starting currents that are too high therefore cannot be started/operated, even though the nominal output of the inverter suggests that they can. When dimensioning the backup power circuit, the connected load power and any starting current must also be taken into account.

Devices with high starting currents are, for example:

• Devices with electric motors (e.g., lifting platform, circular saws, planing bench)
• Devices with large transmission ratio and flywheel mass
• Devices with compressors (e.g., compressed air compressors, air conditioning systems)

IMPORTANT!
Very high starting currents can cause short-term distortion or a drop in output voltage. Operating electronic devices simultaneously in the same backup power supply system should be avoided.

Load imbalance
When dimensioning three-phase backup power networks, the total output power and the power output per phase of the inverter must be taken into account.

IMPORTANT!
The inverter may only be operated within the limits of its technical capabilities. Operation outside of its technical capabilities can cause the inverter to shut down.

1. General information
2. Safety information

Grounding a point in the device, system, or installation serves as a protective measure against electric shock in the event of a fault. When installing an inverter from safety class 1 (see Technical data), a ground conductor connection is required.

When connecting the ground conductor, ensure that it is secured to prevent unintentional disconnection. All of the points listed in the chapter headed Connecting the inverter to the public grid (AC side) on page (→) must be observed. When using strain-relief devices, it is important to ensure that the ground conductor is loaded last in the event of a failure. The respective national standards and regulations and requirements for minimum cross-section must be observed when connecting the ground conductor.

1. General information

The inverter offers the option to use the integrated AC relays as section switches in conjunction with a central grid and system protection unit (in accordance with VDE-AR-N 4105:2018:11 §6.4.1). For this purpose, the central trigger device (switch) must be integrated into the WSD chain as described in chapter WSD (wired shutdown) on page (→).

1. General information
2. Protection of people and equipment

The inverter offers the option to use the integrated AC relays as section switches in conjunction with a central grid and system protection unit (in accordance with VDE-AR-N 4105:2018:11 §6.4.1). For this purpose, the central trigger device (switch) must be integrated into the WSD chain as described in chapter WSD (wired shutdown) on page (→).

1. General information
2. Protection of people and equipment

The wired shutdown (WSD) interrupts the inverter's grid power feed if the trigger device (switch, e.g., Emergency Stop or fire alarm contact) has been activated.

If an inverter (slave) fails, it is bypassed and the other inverters continue operating. If a second inverter (slave) or the inverter (master) fails, the operation of the entire WSD chain is interrupted.

For installation, see Installing the WSD (wired shutdown) on page (→).

1. General information
2. Protection of people and equipment

The inverter is equipped with an RCMU (RCMU = residual current monitoring unit) according to IEC 62109-2 and IEC63112.
It monitors residual currents from the PV module up to the AC output and disconnects the inverter from the grid when an improper residual current is detected.

1. General information
2. Protection of people and equipment

In the case of photovoltaic systems with ungrounded PV modules, the inverter checks the resistance between the positive or negative pole of the photovoltaic system and the ground potential before starting grid power feed operation. In the event of a short circuit between the DC+ or DC- cable and ground (e.g., due to inadequately insulated DC cables or defective PV modules), feeding into the public grid is prevented.

1. General information
2. Protection of people and equipment

If one of the following safety devices is triggered, the inverter switches to a safe state:

• WSD
• Insulation monitoring
• RCMU
• AFCI

In the safe state, the inverter no longer feeds energy in and is disconnected from the grid by the AC relay opening.

1. General information

Technical data, warning notices, labels, and safety symbols are located on the inverter. This information must be kept in a legible condition and must not be removed, covered, pasted over, or painted over. The notices and safety symbols warn against incorrect operation, which may result in serious injury and property damage.

A 4-digit number (coded production date) is printed on the rating plate at the very bottom, from which the production date can be calculated.
If you subtract the value 11 from the first two digits, you get the year of production. The last two digits represent the calendar week in which the device was produced.

Example:
Value on rating plate = 3206
32 - 11 = 21 → Production year 2021
06 = Calendar week 06

Symbols on the rating plate:
	CE label – confirms compliance with applicable EU directives and regulations.
	UKCA marking – confirms compliance with applicable UK directives and regulations.
	WEEE marking – waste electrical and electronic equipment must be collected separately and recycled in an environmentally sound manner in accordance with the European Directive and national law.
	RCM marking – tested according to the requirements of Australia and New Zealand.
	ICASA marking – tested according to the requirements of the Independent Communications Authority of South Africa.
	CMIM marking – tested according to IMANOR requirements for import regulations and compliance with Moroccan standards.

Safety symbols:
	Integrated switch disconnector on the input side of the inverter with switch-on, switch-off, and isolating function according to IEC 60947-3 and AS 60947.3. The values required by the applicable standard for Ithe solar +60°C are given.
	Risk of serious injury and property damage due to incorrect operation.
	Do not use the functions described here until you have fully read and understood the following documents: These operating instructions. All operating instructions for the system components of the photovoltaic system, especially the safety rules.
	Dangerous electrical voltage.
	Allow the capacitors of the inverter to discharge (2 minutes).

Warning notice text:

WARNING!
An electric shock can be fatal. Before opening the device, ensure that the input and output sides are de-energized and disconnected.

1. General information
2. General

Technical data, warning notices, labels, and safety symbols are located on the inverter. This information must be kept in a legible condition and must not be removed, covered, pasted over, or painted over. The notices and safety symbols warn against incorrect operation, which may result in serious injury and property damage.

A 4-digit number (coded production date) is printed on the rating plate at the very bottom, from which the production date can be calculated.
If you subtract the value 11 from the first two digits, you get the year of production. The last two digits represent the calendar week in which the device was produced.

Example:
Value on rating plate = 3206
32 - 11 = 21 → Production year 2021
06 = Calendar week 06

Symbols on the rating plate:
	CE label – confirms compliance with applicable EU directives and regulations.
	UKCA marking – confirms compliance with applicable UK directives and regulations.
	WEEE marking – waste electrical and electronic equipment must be collected separately and recycled in an environmentally sound manner in accordance with the European Directive and national law.
	RCM marking – tested according to the requirements of Australia and New Zealand.
	ICASA marking – tested according to the requirements of the Independent Communications Authority of South Africa.
	CMIM marking – tested according to IMANOR requirements for import regulations and compliance with Moroccan standards.

Safety symbols:
	Integrated switch disconnector on the input side of the inverter with switch-on, switch-off, and isolating function according to IEC 60947-3 and AS 60947.3. The values required by the applicable standard for Ithe solar +60°C are given.
	Risk of serious injury and property damage due to incorrect operation.
	Do not use the functions described here until you have fully read and understood the following documents: These operating instructions. All operating instructions for the system components of the photovoltaic system, especially the safety rules.
	Dangerous electrical voltage.
	Allow the capacitors of the inverter to discharge (2 minutes).

Warning notice text:

WARNING!
An electric shock can be fatal. Before opening the device, ensure that the input and output sides are de-energized and disconnected.

1. General information
2. General

The conventions regarding how information is presented in the document, which are set out below, have been defined in order to increase the readability and comprehensibility of the document.

Application notes

IMPORTANT! Indicates application notes and other useful information. It does not indicate a harmful or dangerous situation.

Software

Software functions and elements of a graphical user interface (e.g., buttons, menu items) are highlighted in the text with this mark up.

Example: Click Save.

Instructions for action

1. General information
2. General

The information contained in these operating instructions is intended only for qualified personnel. An electric shock can be fatal. Do not carry out any actions other than those described in the documentation. This also applies to qualified personnel.

All cables must be secured, undamaged, insulated, and adequately dimensioned. Loose connections, damaged or under-dimensioned cables must be repaired immediately by an authorized specialist company.

Maintenance and repair work must only be carried out by an authorized specialist company.

It is impossible to guarantee that third-party parts are designed and manufactured to meet the demands made on them, or that they satisfy safety requirements. Only use original spare parts.

Do not carry out any alterations, installations, or modifications to the device without first obtaining the manufacturer's permission.

Replace any damaged components or have them replaced immediately.

1. General information
2. General

• backing up any changes made to the factory settings
• saving and storing personal settings

1. General information
2. General

Copyright of these operating instructions remains with the manufacturer.

Text and illustrations were accurate at the time of printing, subject to change.
We are grateful for suggestions for improvement and information on any discrepancies in the operating instructions.

1. General information

The inverter transforms the direct current generated by the PV modules into alternating current. This alternating current is fed into the public grid and synchronized with the mains voltage in use. Moreover, the solar energy can also be stored in a connected battery for later use.

The inverter is intended for use in grid-connected photovoltaic systems. The inverter has backup power functions and switches to backup power mode if it has been wired accordingly*.

The inverter automatically monitors the public grid. Whenever conditions in the electric grid are inconsistent with standard conditions (e.g., grid switch-off, interruption), the inverter will immediately stop producing power and interrupt the supply of power into the grid.
The grid is monitored by monitoring the voltage, frequency, and islanding conditions.

After installation and commissioning, the inverter's operation is fully automatic; the inverter draws the maximum possible power from the solar modules.
Depending on the operating point, this power is used in the home, stored in a battery*, or fed into the grid.

As soon as the energy provided by the solar modules is no longer sufficient, the power from the battery is fed into the home network. Depending on the setting, power may also be obtained from the public grid in order to charge the battery*.

When its temperature gets too high, the inverter automatically reduces the output or charging power, or switches off completely, in order to protect itself.
Reasons for the temperature being too high include a high ambient temperature or insufficient heat dissipation (for example, inadequate heat dissipation when installed in switch cabinets).

1. General information
2. Fronius Symo GEN24

The inverter transforms the direct current generated by the PV modules into alternating current. This alternating current is fed into the public grid and synchronized with the mains voltage in use. Moreover, the solar energy can also be stored in a connected battery for later use.

The inverter is intended for use in grid-connected photovoltaic systems. The inverter has backup power functions and switches to backup power mode if it has been wired accordingly*.

The inverter automatically monitors the public grid. Whenever conditions in the electric grid are inconsistent with standard conditions (e.g., grid switch-off, interruption), the inverter will immediately stop producing power and interrupt the supply of power into the grid.
The grid is monitored by monitoring the voltage, frequency, and islanding conditions.

After installation and commissioning, the inverter's operation is fully automatic; the inverter draws the maximum possible power from the solar modules.
Depending on the operating point, this power is used in the home, stored in a battery*, or fed into the grid.

As soon as the energy provided by the solar modules is no longer sufficient, the power from the battery is fed into the home network. Depending on the setting, power may also be obtained from the public grid in order to charge the battery*.

When its temperature gets too high, the inverter automatically reduces the output or charging power, or switches off completely, in order to protect itself.
Reasons for the temperature being too high include a high ambient temperature or insufficient heat dissipation (for example, inadequate heat dissipation when installed in switch cabinets).

1. General information
2. Fronius Symo GEN24

Function	Symo GEN24	Symo GEN24 Plus
Backup power variant - PV Point (OP)
Battery connection*	Available as an option**
Backup power variant - Full Backup	Available as an option**

1. General information
2. Fronius Symo GEN24

With Fronius UP*, optionally available functions can be added to the inverter by the authorized specialist company (see chapter Function overview).

1. General information
2. Fronius Symo GEN24

(1)	Housing cover
(2)	Inverter
(3)	Mounting bracket (illustration)
(4)	Quick Start guide
(5)	2x ferrite ring with holder

1. General information
2. Fronius Symo GEN24

The inverter is designed to convert direct current from PV modules into alternating current and feed this power into the public grid. A backup power mode* is possible if the wiring is set up accordingly.

• Carefully reading and following all the instructions as well as complying with the safety and danger notices in the operating instructions
• Installation in accordance with the chapter headed Installation, from page (→)

Follow all grid operator regulations regarding energy fed into the grid and connection methods.

• The inverter may be operated for max. 2000 operating hours in backup power mode
• The inverter may be operated for more than 2000 operating hours in backup power mode provided 20% of the grid power feed operating time of the inverter is not exceeded at the time in question

1. General information
2. Fronius Symo GEN24

Ambient air is drawn in at the front of the device by the fan and blown out at the sides. The even heat dissipation allows several inverters to be installed next to each another.

1. General information
2. Fronius Symo GEN24

System owners and installers can easily monitor and analyze the PV system using Fronius Solar.web or Fronius Solar.web Premium. With the appropriate configuration, the inverter transmits data such as power, yield, load, and energy balance to Fronius Solar.web. More detailed information can be found at Solar.web - Monitoring & analysis.

Configuration is carried out using the Setup wizard; see the chapter headed Installation with the app on page (→) or Installation with the browser on page (→).

• Internet connection (download: min. 512 kbit/s, upload: min. 256 kbit/s)*.
• User account at solarweb.com.
• Completed configuration using the Setup wizard.

1. General information
2. Fronius Symo GEN24

The inverter can be found via the Multicast DNS (mDNS) protocol. We recommend searching for the inverter using the assigned host name.

• NominalPower
• Systemname
• DeviceSerialNumber
• SoftwareBundleVersion

1. General information

		PV module generates direct current
		Fronius GEN24 inverter converts direct current into alternating current and charges the battery (battery charging requires battery support, see chapter Function overview on page (→)). The integrated system monitoring enables the inverter to be integrated into a network by means of WLAN.
		Additional inverter in the system converts the direct current into alternating current. However, it cannot charge a battery and is not available in backup power mode.
		Battery is coupled to the inverter on the direct current side and stores electrical energy.
		Fronius Ohmpilot for using excess energy to heat water.
		Primary meter records the load curve of the system and makes the measured data available for energy profiling in Fronius Solar.web. The primary meter also regulates the dynamic feed-in control.
		Secondary meter records the load curve of individual loads (e.g., washing machine, lights, television, heat pump, etc.) in the load branch and makes the measured data available for energy profiling in Fronius Solar.web.
		Loads in the system are the loads connected in the system.
		Additional loads and producers in the system which are connected to the system by means of a Smart Meter.
		PV Point is a non-interruption-free 1‑phase backup power circuit, which supplies electrical devices up to a maximum output of 3 kW, provided sufficient power is available from the PV modules or the battery.
		Full Backup the inverter is prepared for backup power mode. The backup power function must be implemented in the switch cabinet by the electrician performing the installation. The PV system operates in a stand-alone manner in backup power mode.
		Grid supplies the loads in the system if insufficient power is being generated by the PV modules or supplied by the battery.

1. General information
2. Different operating modes

		PV module generates direct current
		Fronius GEN24 inverter converts direct current into alternating current and charges the battery (battery charging requires battery support, see chapter Function overview on page (→)). The integrated system monitoring enables the inverter to be integrated into a network by means of WLAN.
		Additional inverter in the system converts the direct current into alternating current. However, it cannot charge a battery and is not available in backup power mode.
		Battery is coupled to the inverter on the direct current side and stores electrical energy.
		Fronius Ohmpilot for using excess energy to heat water.
		Primary meter records the load curve of the system and makes the measured data available for energy profiling in Fronius Solar.web. The primary meter also regulates the dynamic feed-in control.
		Secondary meter records the load curve of individual loads (e.g., washing machine, lights, television, heat pump, etc.) in the load branch and makes the measured data available for energy profiling in Fronius Solar.web.
		Loads in the system are the loads connected in the system.
		Additional loads and producers in the system which are connected to the system by means of a Smart Meter.
		PV Point is a non-interruption-free 1‑phase backup power circuit, which supplies electrical devices up to a maximum output of 3 kW, provided sufficient power is available from the PV modules or the battery.
		Full Backup the inverter is prepared for backup power mode. The backup power function must be implemented in the switch cabinet by the electrician performing the installation. The PV system operates in a stand-alone manner in backup power mode.
		Grid supplies the loads in the system if insufficient power is being generated by the PV modules or supplied by the battery.

1. General information
2. Different operating modes

In order to be able to obtain the highest rate of self-consumption with your photovoltaic system, a battery can be used to store excess energy. The battery is coupled to the inverter on the direct current side. Multiple current conversion is therefore not required, and the efficiency is increased.

1. General information
2. Different operating modes

1. General information
2. Different operating modes

1. General information
2. Different operating modes

IMPORTANT!
In backup power mode, an increased nominal frequency is used in order to prevent undesired parallel operation with other power generators.

• Supply loads in the house
• Store excess energy in the battery and/or feed it into the grid
• Supply connected loads in the event of a power failure

1. General information
2. Different operating modes

1. General information
2. Different operating modes

IMPORTANT!
In the fully equipped hybrid PV system with a Fronius Ohmpilot, the Ohmpilot cannot be operated in the event of a power failure for regulatory reasons. It is therefore sensible to install the Ohmpilot outside of the backup power branch.

1. General information
2. Different operating modes

In the hybrid PV system, batteries may only be connected to an inverter with battery support. Batteries cannot be split between multiple inverters with battery support. Depending on the battery manufacturer, however, several batteries can be combined on one inverter.

1. General information
2. Different operating modes

In the hybrid PV system, batteries may only be connected to an inverter with battery support. Batteries cannot be split between multiple inverters with battery support. Depending on the battery manufacturer, however, several batteries can be combined on one inverter.

1. General information
2. Different operating modes

(1)	PV module – inverter – load/grid/battery
(2)	Battery – inverter – load/grid*
(3)	Grid – inverter – battery*

* Depending on the settings and local standards and regulations.

1. General information
2. Different operating modes

Battery systems distinguish between different operating states. In each case, the relevant current operating state is displayed on the user interface of the inverter or in Fronius Solar.web.

1. General information

Energy saving mode (standby mode) is used to reduce the self-consumption of the system. Both the inverter and the battery automatically switch to energy saving mode under certain conditions.

The inverter switches to energy saving mode if the battery is flat and no PV power is available. Only the inverter's communication with the Fronius Smart Meter and Fronius Solar.web is maintained.

1. General information
2. Energy-saving mode

Energy saving mode (standby mode) is used to reduce the self-consumption of the system. Both the inverter and the battery automatically switch to energy saving mode under certain conditions.

The inverter switches to energy saving mode if the battery is flat and no PV power is available. Only the inverter's communication with the Fronius Smart Meter and Fronius Solar.web is maintained.

1. General information
2. Energy-saving mode

If all the switch-off conditions are met, the battery switches into energy saving mode within ten minutes. This time delay ensures that the inverter can at least be restarted.

		The battery state of charge is less than or equal to the input minimum state of charge.
		The current charging or discharging power of the battery is less than 100 W.
		Less than 50 W is available for charging the battery. The power of feeding into the public grid is at least 50 W less than the power currently required in the home network.

The inverter automatically switches into energy saving mode, following the battery.

1. General information
2. Energy-saving mode

• Energy saving mode is no longer permissible owing to a changed setting on the user interface of the inverter.
• If dynamic power reduction of 0 is set, or if the system is operating in backup power mode, the power of feeding into the public grid is always less than the required power in the home network.
  There is a separate condition for this case (dynamic power reduction < 300 W or active backup power mode):
  • If the PV power is above a specified threshold, energy saving mode is ended.
• Battery charging from the public grid is requested via the user interface of the inverter.
• The battery is being recharged in order to restore the minimum state of charge or perform calibration.

1. General information
2. Energy-saving mode

If the inverter does not operate for 12 minutes (e.g., fault), or there is an interruption in the electrical connection between the inverter and the battery and there is no backup power mode, the battery switches to energy-saving mode in any case. This reduces self discharge of the battery.

1. General information
2. Energy-saving mode

• Operating LED for the inverter lights up orange (see Button functions and LED status indicator on page (→)).
• The user interface of the inverter can be reached.
• All the available data are saved and transmitted to Solar.web.
• The real-time data can be seen on Solar.web.

Energy saving mode is shown on the user interface of the inverter and in Solar.web by an "i" beside the battery symbol in the system overview.

1. General information

Fronius explicitly points out that the third-party batteries are not Fronius products. Fronius is not the manufacturer, distributor, or retailer of these batteries. Fronius accepts no liability and offers no service or guarantees for these batteries.

Read this document and the Installation Instructions before installing and commissioning the external battery. The documentation is either enclosed with the external battery or can be obtained from the battery manufacturer or their service partners

All documents associated with the inverter can be found at the following address:
https://www.fronius.com/en/solar-energy/installers-partners/service-support/tech-support

1. General information
2. Suitable batteries

Fronius explicitly points out that the third-party batteries are not Fronius products. Fronius is not the manufacturer, distributor, or retailer of these batteries. Fronius accepts no liability and offers no service or guarantees for these batteries.

Read this document and the Installation Instructions before installing and commissioning the external battery. The documentation is either enclosed with the external battery or can be obtained from the battery manufacturer or their service partners

All documents associated with the inverter can be found at the following address:
https://www.fronius.com/en/solar-energy/installers-partners/service-support/tech-support

1. General information
2. Suitable batteries

BYD Battery-Box Premium HVS	5.1	7.7	10.2	12.81)
Number of battery modules	2	3	4	5
Fronius Symo GEN242)
Fronius Symo GEN24 Plus
Battery parallel operation 3)

BYD Battery-Box Premium HVM	8.3	11.0	13.8	16.6	19.3	22.1
Number of battery modules	3	4	5	6	7	8
Fronius Symo GEN242)
Fronius Symo GEN24 Plus
Battery parallel operation 3)

IMPORTANT! The following switch-on sequence for the system must always be followed to ensure reliable operation with a BYD Battery-Box Premium.

1

Switch on the battery.

2

Set the DC disconnector to the "on" switch position. Turn on the automatic circuit breaker.

1. General information
2. Suitable batteries

LG FLEX	8.6	12.9	17.2
Number of battery modules	2	3	4
Fronius Symo GEN24*
Fronius Symo GEN24 Plus

Switching on the battery

1

Pull off the cover to the right.

2

Pull off the cover of the DC disconnector to the front. Set the DC disconnector to the "on" switch position.

To assemble the battery, perform the steps listed above in reverse order.

1. General information

There is no energy available from the PV modules or from the public grid. If backup power operation or battery operation are not possible (e.g., deep discharge protection of the battery), the inverter and battery switch off.

1. General information
2. Manual system start

There is no energy available from the PV modules or from the public grid. If backup power operation or battery operation are not possible (e.g., deep discharge protection of the battery), the inverter and battery switch off.

1. General information
2. Manual system start

Status codes about the inactive state of the battery are displayed on the user interface of the inverter. A notification via e-mail can be activated in Fronius Solar.web.

1. General information
2. Manual system start

As soon as energy is available again, the inverter starts operation automatically; however, the battery must be started manually. The switch-on sequence must be observed for this, see chapter Suitable batteries on page (→).

1. General information
2. Manual system start

The inverter requires energy from the battery to start backup power operation. This is done manually on the battery; further information on the power supply for restarting the inverter via the battery can be found in the battery manufacturer's Operating Instructions.

1. General information

 

1. General information
2. Operating controls and connections

 

1. General information
2. Operating controls and connections

The connection area divider separates the high-voltage conductors (DC and AC) from the signal lines. To make it easier to reach the connection area, the divider can be removed for the connection work, and must be re-inserted.

(1)	Integrated cable duct
(2)	Recesses for removing the connection area divider
(3)	Snap tabs for locking/unlocking
(4)	Defined breaking point for the DatCom connection

The integrated cable duct (1) allows for the lines to be laid from one area of the inverter to the other. As a result, multiple inverters can be easily installed next to each other.

1. General information
2. Operating controls and connections

The ground electrode terminal    allows additional components to be earthed, such as:

• AC cable
• Module mounting system
• Ground rod

1. General information
2. Operating controls and connections

The DC disconnector has three switch settings:

(1)	Locked/off (turned to the left)
(2)	Off
(3)	On

IMPORTANT!
In switch settings (1) and (3), the inverter can be secured to prevent it from being switched on/off using a standard padlock. The national guidelines must be complied with in this respect.

1. General information
2. Operating controls and connections

1. General information
2. Operating controls and connections

	The operating status LED displays the status of the inverter. In case of faults, follow the individual steps in the Fronius Solar.start app.
	The optical sensor is actuated by touching it with a finger.
	The communications LED displays the connection status. To establish a connection, follow the individual steps in the Fronius Solar.start app.

Sensor functions
		1x    = WLAN access point (AP) is opened.    Flashes blue
		2x    = WLAN protected setup (WPS) is activated.    Flashes green
		3 seconds    (max. 6 seconds) = The service message disappears.    Flashes white (quickly)

LED status indicator
		The inverter is operating correctly.    Lights up green
		The inverter is performing the grid checks required by the applicable standards for grid power feed operation.    Flashes green
		The inverter is on standby, is not operating (e.g., no energy fed into the grid at night), or is not configured.    Lights up yellow
		The inverter displays a non-critical status.    Flashes yellow
		The inverter displays a critical status and no energy is fed into the grid.    Lights up red
		The inverter displays a backup power overload.    Flashes red
		The network connection is being established via WPS. 2x    = WPS search mode.    Flashes green
		The network connection is being established via WLAN AP. 1x    = WLAN AP search mode (active for 30 minutes).    Flashes blue
		The network connection is not configured.    Lights up yellow
		A network error is displayed, the inverter is operating correctly.    Lights up red
		The network connection is active.    Lights up blue
		The inverter is performing an update.    /    Flash blue
		There is a service message.    Lights up white

1. General information
2. Operating controls and connections

The V+/GND pin provides the possibility of feeding in a voltage in the range of 12.5 to 24 V (+ max. 20%) using an external power supply unit. Outputs IO 0 - 5 can then be operated using the external voltage that has been fed in. A maximum of 1 A may be drawn per output, whereby a total of max. 3 A is permitted. The fuse protection must take place externally.

IMPORTANT!
If the total output (6W) is exceeded, the inverter switches off the entire external power supply.

IMPORTANT!
If several backup power variants are available, please note that only one backup power variant may be installed and configured.

The inverter can provide 220‑240 V at the PV Point/PV Point Comfort. A corresponding configuration must be set up during commissioning.

At 220‑240 V output voltage, max. 13 A AC continuous current is available.

Example:
220 V *13 A = 2,860 W
230 V *13 A = max. 3 kW

In backup power mode, some electrical appliances cannot function properly as starting currents are too high (for example, fridges and freezers). It is recommended to switch off non-essential loads during backup power mode. Overload capacity of 35% is possible for a duration of 5 seconds, depending on the capacity of the PV modules and/or the battery at that moment in time.

There is a brief interruption when switching from grid-connected mode to backup power mode. For this reason, the backup power function cannot be used as an uninterruptible power supply, for example for computers.

If no energy from the battery or the PV modules is available in backup power mode, backup power mode ends automatically. If sufficient energy becomes available from the PV modules once again, backup power mode starts again automatically.

In the event of excessive consumption, backup power mode is stopped and the "backup power overload" status code is displayed on the inverter's LED status indicator (see Button functions and LED status indicator on page (→)). The maximum power in backup power mode according to the technical data must be observed.

1. Backup power variant - PV Point (OP)

IMPORTANT!
If several backup power variants are available, please note that only one backup power variant may be installed and configured.

The inverter can provide 220‑240 V at the PV Point/PV Point Comfort. A corresponding configuration must be set up during commissioning.

At 220‑240 V output voltage, max. 13 A AC continuous current is available.

Example:
220 V *13 A = 2,860 W
230 V *13 A = max. 3 kW

In backup power mode, some electrical appliances cannot function properly as starting currents are too high (for example, fridges and freezers). It is recommended to switch off non-essential loads during backup power mode. Overload capacity of 35% is possible for a duration of 5 seconds, depending on the capacity of the PV modules and/or the battery at that moment in time.

There is a brief interruption when switching from grid-connected mode to backup power mode. For this reason, the backup power function cannot be used as an uninterruptible power supply, for example for computers.

If no energy from the battery or the PV modules is available in backup power mode, backup power mode ends automatically. If sufficient energy becomes available from the PV modules once again, backup power mode starts again automatically.

In the event of excessive consumption, backup power mode is stopped and the "backup power overload" status code is displayed on the inverter's LED status indicator (see Button functions and LED status indicator on page (→)). The maximum power in backup power mode according to the technical data must be observed.

1. Backup power variant - PV Point (OP)
2. General

IMPORTANT!
If several backup power variants are available, please note that only one backup power variant may be installed and configured.

The inverter can provide 220‑240 V at the PV Point/PV Point Comfort. A corresponding configuration must be set up during commissioning.

At 220‑240 V output voltage, max. 13 A AC continuous current is available.

Example:
220 V *13 A = 2,860 W
230 V *13 A = max. 3 kW

In backup power mode, some electrical appliances cannot function properly as starting currents are too high (for example, fridges and freezers). It is recommended to switch off non-essential loads during backup power mode. Overload capacity of 35% is possible for a duration of 5 seconds, depending on the capacity of the PV modules and/or the battery at that moment in time.

There is a brief interruption when switching from grid-connected mode to backup power mode. For this reason, the backup power function cannot be used as an uninterruptible power supply, for example for computers.

If no energy from the battery or the PV modules is available in backup power mode, backup power mode ends automatically. If sufficient energy becomes available from the PV modules once again, backup power mode starts again automatically.

In the event of excessive consumption, backup power mode is stopped and the "backup power overload" status code is displayed on the inverter's LED status indicator (see Button functions and LED status indicator on page (→)). The maximum power in backup power mode according to the technical data must be observed.

1. Backup power variant - PV Point (OP)
2. General

With the PV Point, in the event of a failure of the public grid, 1‑phase electrical devices can be connected to the Opportunity Power (OP) terminal and supplied with a maximum power of 3 kW, if enough power is available from the PV modules or an optional battery. In grid-connected operation, the OP terminal is not supplied with voltage, therefore the connected loads will not be continuously supplied with power.

IMPORTANT!
A relay-based network switching setup is not possible.

Installation Instructions, see Connecting backup power - PV Point (OP) on page (→).

1. Backup power variant - PV Point (OP)
2. General

With PV Point Comfort, 1-phase electrical devices are continuously supplied up to a maximum power of 3 kW.
Switching between grid-connected and backup power mode takes place automatically. In the event of a failure of the public grid or the inverter, the loads on the PV Point Comfort continue to be supplied. When the public grid is available again and stability is assured, the PV Point Comfort automatically switches to grid-connected operation and backup power mode is terminated.

IMPORTANT!
There must be sufficient power from the PV modules or a battery for backup power mode to run. The PV Point Comfort is not available in Australia and New Zealand.

For further information and the Installation Instructions, see PV Point Comfort on page (→).

IMPORTANT!
If several backup power variants are available, it is important to note that only one backup power variant may be installed and configured.

• The inverter must support the backup power variant 'Full Backup' (see chapter Function overview on page (→)).
• A battery suitable for backup power use must be installed and configured.
• Correct cabling of the backup power system in the electrical installation (see chapter Components for switching to backup power on page (→) or Circuit Diagrams on page (→)).
• Install and configure the Fronius Smart Meter at the feed-in point.
• Attach a backup power supply warning (https://www.fronius.com/en/search-page, item number: 42,0409,0275) to the electrical distributor.
• Apply the necessary settings in the Devices and system components > Functions and pins > Backup Power menu item and activate backup power.
• Go through the checklist - Backup power (https://www.fronius.com/en/search-page, item number: 42,0426,0365) step by step and confirm.

1. Backup power variant - Full Backup

IMPORTANT!
If several backup power variants are available, it is important to note that only one backup power variant may be installed and configured.

• The inverter must support the backup power variant 'Full Backup' (see chapter Function overview on page (→)).
• A battery suitable for backup power use must be installed and configured.
• Correct cabling of the backup power system in the electrical installation (see chapter Components for switching to backup power on page (→) or Circuit Diagrams on page (→)).
• Install and configure the Fronius Smart Meter at the feed-in point.
• Attach a backup power supply warning (https://www.fronius.com/en/search-page, item number: 42,0409,0275) to the electrical distributor.
• Apply the necessary settings in the Devices and system components > Functions and pins > Backup Power menu item and activate backup power.
• Go through the checklist - Backup power (https://www.fronius.com/en/search-page, item number: 42,0426,0365) step by step and confirm.

1. Backup power variant - Full Backup
2. General

IMPORTANT!
If several backup power variants are available, it is important to note that only one backup power variant may be installed and configured.

• The inverter must support the backup power variant 'Full Backup' (see chapter Function overview on page (→)).
• A battery suitable for backup power use must be installed and configured.
• Correct cabling of the backup power system in the electrical installation (see chapter Components for switching to backup power on page (→) or Circuit Diagrams on page (→)).
• Install and configure the Fronius Smart Meter at the feed-in point.
• Attach a backup power supply warning (https://www.fronius.com/en/search-page, item number: 42,0409,0275) to the electrical distributor.
• Apply the necessary settings in the Devices and system components > Functions and pins > Backup Power menu item and activate backup power.
• Go through the checklist - Backup power (https://www.fronius.com/en/search-page, item number: 42,0426,0365) step by step and confirm.

1. Backup power variant - Full Backup
2. General

1. The public grid is monitored by the inverter's internal grid and system protection unit and by the Fronius Smart Meter connected to it.
2. The public grid fails or specific grid parameters are undershot or exceeded.
3. The inverter carries out the measures necessary according to the country standard and then switches off.
4. The inverter starts backup power mode after a checking period.
5. All loads in the household that are in the backup power circuit are supplied by the battery and the PV modules. The remaining loads are not supplied with power and are safely isolated.
   

1. Backup power variant - Full Backup
2. General

1. The inverter is operating in backup power mode.
2. The public grid is functioning correctly again.
3. The Fronius Smart Meter monitors the grid parameters on the public grid and passes this information to the inverter.
4. The stability of the restored public grid is determined by checking the measured values of the Fronius Smart Meter.
5. Backup power mode is terminated automatically or manually depending on the design of the backup power switchover facility.
6. All circuits are reconnected to the public grid and are supplied by the grid.
7. The inverter can start grid power feed operation again after performing the grid checks required by the relevant standard.

1. Backup power variant - Full Backup
2. General

• The battery is discharged to the minimum state of charge and no energy is coming from the PV modules.
• The inverter is set to energy saving mode (standby mode).

• Enough energy is available from the PV modules.
• The public grid is functioning again.
• The battery is switched off and on.

1. Backup power variant - Full Backup

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Disconnecting from the public grid to enable operation in backup power mode if the grid parameters are outside the country-specific standards.
• Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the nominal output of the inverter. Furthermore, the performance of the connected battery must also be considered.

1. Backup power variant - Full Backup
2. Automatic switch to backup power including backup power circuits and 3-pin separation, e.g., Austria or Australia

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Disconnecting from the public grid to enable operation in backup power mode if the grid parameters are outside the country-specific standards.
• Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the nominal output of the inverter. Furthermore, the performance of the connected battery must also be considered.

1. Backup power variant - Full Backup
2. Automatic switch to backup power including backup power circuits and 3-pin separation, e.g., Austria or Australia

1. The public grid is monitored by the inverter's internal grid and system protection unit and by the Fronius Smart Meter connected to it.
2. Failure of the public grid.
3. The inverter carries out the measures necessary according to the country standard and then switches off.
   Contactor K1 drops out. This disconnects the backup power circuits and the inverter from the rest of the home network and from the public grid, as the main contacts of contactor K1 open. The inverter activates relay K3, which interrupts the supply to contactor K1. This prevents unintentional activation of contactor K1 and thus a grid connection when voltage is restored in the grid. The NC auxiliary contacts of contactor K1 send feedback to the inverter that the contactor is open (a condition for starting backup power mode).
4. The NO contact of relay K3 gives additional feedback to the inverter on whether the locking was successfully performed by relay K3.
5. The inverter decides based on the contactor's feedback as well as the measurements on the inverter terminals that the backup power mode can be activated.
6. After all the required activation tests have been carried out, the inverter starts backup power mode.
7. All loads in the backup power circuits are supplied with power. The remaining loads are not supplied with power and are safely isolated.

1. Backup power variant - Full Backup
2. Automatic switch to backup power including backup power circuits and 3-pin separation, e.g., Austria or Australia

1. The inverter is operating in backup power mode. Contactor K1 to the public grid is open.
2. Public grid available again.
3. The Fronius Smart Meter monitors the grid parameters on the public grid and passes this information to the inverter.
4. The stability of the restored public grid is determined by checking the measured values of the Fronius Smart Meter.
5. The inverter ends backup power mode and disconnects the outputs.
6. The inverter deactivates K3. Contactor K1 is reactivated.
7. All circuits are reconnected to the public grid and are supplied by the grid. The inverter does not feed anything into the grid at this time.
8. The inverter can start grid power feed operation again after performing the grid checks required by the relevant standard.

1. Backup power variant - Full Backup

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Disconnecting from the public grid to enable operation in backup power mode if the grid parameters are outside the country-specific standards.
• Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
• Establishing a proper ground connection for backup power mode to ensure the protection devices function correctly.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the rated power of the inverter. Furthermore, the performance of the connected battery must also be considered.

1. Backup power variant - Full Backup
2. Automatic switch to backup power all-pin separation, e.g., Germany, France, Spain

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Disconnecting from the public grid to enable operation in backup power mode if the grid parameters are outside the country-specific standards.
• Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
• Establishing a proper ground connection for backup power mode to ensure the protection devices function correctly.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the rated power of the inverter. Furthermore, the performance of the connected battery must also be considered.

1. Backup power variant - Full Backup
2. Automatic switch to backup power all-pin separation, e.g., Germany, France, Spain

1. The public grid is monitored by the inverter's internal grid and system protection unit and by the Fronius Smart Meter connected to it.
2. Failure of the public grid.
3. The inverter carries out the necessary measures according to the country standard and then switches off.
   Contactors K1, K4, and K5 drop out. This disconnects the backup power circuits and the inverter from the rest of the home network and from the public grid, as the main contacts of contactor K1 open (all-pin). The NC auxiliary contacts of contactor K1 send feedback to the inverter that the contactor is open (a condition for starting backup power mode).
4. The NC main contacts of contactors K4 and K5 are closed, establishing a connection between the neutral conductor and the ground conductor. The two other NC main contacts of contactors K4 and K5 give feedback to the inverter that the ground connection has been established correctly (a condition for starting backup power mode).
5. The inverter activates relay K3, which interrupts the supply to contactors K1, K4, and K5. This prevents unintentional activation of contactors K1, K4, and K5 and thus a grid connection when voltage is restored in the grid.
6. The NO contact of relay K3 gives additional feedback to the inverter on whether the locking was successfully performed by relay K3.
7. The inverter decides based on the contactors' feedback as well as the measurements on the inverter terminals that the backup power mode can be started.
8. After all the required activation tests have been carried out, the inverter starts backup power mode.
9. All loads in the backup power circuits are supplied with power. The remaining loads are not supplied with power and are safely isolated.

1. Backup power variant - Full Backup
2. Automatic switch to backup power all-pin separation, e.g., Germany, France, Spain

1. The inverter is operating in backup power mode. Contactor K1 to the public grid is open.
2. Public grid available again.
3. The Fronius Smart Meter monitors the grid parameters on the public grid and passes this information to the inverter.
4. The stability of the restored public grid is determined by checking the measured values of the Fronius Smart Meter.
5. The inverter ends backup power mode and disconnects the outputs.
6. The inverter deactivates K3. Power is restored to contactors K1, K4, and K5.
7. All circuits are reconnected to the public grid and are supplied by the grid. The inverter does not feed anything into the grid at this time.
8. The inverter can start grid power feed operation again after performing the grid checks required by the relevant standard.

1. Backup power variant - Full Backup

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Monitoring of the voltage and frequency grid parameters by the inverter.
• Disconnecting from the public grid to enable operation in backup power mode if the grid parameters are outside the country-specific standards.
• Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
• Establishing a correct ground connection for backup power mode.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the nominal output of the inverter. Furthermore, the performance of the connected battery must also be considered.

1. Backup power variant - Full Backup
2. Automatic switch to backup power all-pin separation, Italy

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Monitoring of the voltage and frequency grid parameters by the inverter.
• Disconnecting from the public grid to enable operation in backup power mode if the grid parameters are outside the country-specific standards.
• Reconnecting to the public grid when the grid parameters are within the limits specified by the country-specific standards.
• Establishing a correct ground connection for backup power mode.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the nominal output of the inverter. Furthermore, the performance of the connected battery must also be considered.

1. Backup power variant - Full Backup
2. Automatic switch to backup power all-pin separation, Italy

1. The public grid is monitored by the inverter's internal grid and system protection unit and by an external grid and system protection unit.
2. Failure of the public grid
3. The inverter carries out the measures necessary according to the country standard and then switches off.
4. The external grid and system protection unit opens contactors K1 and K2 for grid monitoring. This disconnects the backup power circuits and the inverter from the rest of the home network and from the public grid, as the main contacts of contactors K1 and K2 open (all-pin). To ensure that the public grid has definitely been disconnected, the NC auxiliary contacts of contactor K1 give feedback to the external grid and system protection unit.
5. The NC main contacts of contactors K4 and K5 are closed, establishing a connection between the neutral conductor and the ground conductor. The two other NC main contacts of contactors K4 and K5 give feedback to the inverter that the ground connection has been established correctly.
6. The inverter activates relay K3, which activates the remote input of the external grid and system protection unit via an NC contact. This prevents a connection to the public grid when voltage is restored in the grid.
7. The NO contact of relay K3 gives additional feedback to the inverter on whether the locking was successfully performed by relay K3.
8. The inverter decides based on the contactor's feedback as well as the measurement on the inverter terminals that the backup power mode can be activated.
9. The inverter starts backup power mode after a defined checking period.
10. All loads in the backup power circuits are supplied with power. The remaining loads are not supplied with power and are safely isolated.

1. Backup power variant - Full Backup
2. Automatic switch to backup power all-pin separation, Italy

1. The inverter is operating in backup power mode. The contactors K1 and K2 to the public grid are open.
2. Public grid available again.
3. The Fronius Smart Meter monitors the grid parameters on the public grid and passes this information to the inverter.
4. The stability of the restored public grid is determined by checking the measured values of the Fronius Smart Meter.
5. On the basis of adjustments that have been carried out, the inverter ends backup power mode and disconnects the outputs.
6. The inverter deactivates K3. Power is restored to contactors K1, K2, K4, and K5.
7. All circuits are reconnected to the public grid and are supplied by the grid. The inverter does not feed anything into the grid at this time.
8. The inverter can start grid power feed operation again after performing the grid checks required by the relevant standard.

1. Backup power variant - Full Backup

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Monitoring of the grid parameters by the inverter.
• Possibility of manual separation from the public grid if it fails or is deemed unstable.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the rated power of the inverter. Furthermore, the performance of the connected battery must also be considered.
• If, in the event of a public grid failure, there is no manual switch to backup power mode within the first 10 minutes, this may cause the inverter and the battery to shut down. In order to then start backup power mode, manual switching must take place and a manual system start must be performed, if necessary (see chapter Manual system start on page (→)).
• It is possible to manually reconnect the inverter and loads in the backup power circuit to the public grid once it is deemed to be stable again. The inverter only starts feed-in mode once the required grid monitoring time has passed.

1. Backup power variant - Full Backup
2. Manual switch to backup power 3-pin separation, e.g., Austria / all-pin separation, e.g., Germany

• Measuring and transferring the required parameters for energy management and Solar.web by the Fronius Smart Meter.
• Monitoring of the grid parameters by the inverter.
• Possibility of manual separation from the public grid if it fails or is deemed unstable.
• Option of having a separate backup power circuit or several backup power circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the rated power of the inverter. Furthermore, the performance of the connected battery must also be considered.
• If, in the event of a public grid failure, there is no manual switch to backup power mode within the first 10 minutes, this may cause the inverter and the battery to shut down. In order to then start backup power mode, manual switching must take place and a manual system start must be performed, if necessary (see chapter Manual system start on page (→)).
• It is possible to manually reconnect the inverter and loads in the backup power circuit to the public grid once it is deemed to be stable again. The inverter only starts feed-in mode once the required grid monitoring time has passed.

1. Backup power variant - Full Backup
2. Manual switch to backup power 3-pin separation, e.g., Austria / all-pin separation, e.g., Germany

1. The public grid is monitored by the inverter's internal grid and system protection and by the connected Fronius Smart Meter.
2. Failure of the public grid.
3. The inverter takes the necessary measures according to the country standard and then switches off.
4. The user switches changeover switch Q1 from switch position 1 (grid operation) via switch position 0 to switch position 2 (backup power mode). This disconnects the backup power circuits and the inverter from the rest of the home network and from the public grid. In the case of all-pole disconnection, the connection of ground conductor and neutral conductor is also made via the main contacts of the switch. Switch position 2 (backup power mode) is fed back to the inverter via a contact of changeover switch Q1. In addition, when changeover switch Q1 switches via switch position 0, the WSD line is interrupted. This causes the inverter to switch off immediately. This behavior is ensured via 2 contacts. The communication between the inverter and the Fronius Smart Meter is optionally interrupted via a contact. The suspended communication prevents automatic termination of backup power mode when power returns to the public grid. The inverter then remains in backup power mode until it is manually switched back again.
5. Based on the feedback for switch position 2 and the measurements at the inverter terminals, the inverter decides that backup power mode can be started.
6. After all required connection tests have been carried out, the inverter starts in backup power mode.
7. All loads that are in the backup power circuits are supplied. The remaining loads are not supplied and are safely disconnected.

1. Backup power variant - Full Backup
2. Manual switch to backup power 3-pin separation, e.g., Austria / all-pin separation, e.g., Germany

1. The inverter is operating in backup power mode. Changeover switch Q1 is in switch position 2 (backup power mode).
2. Public grid available again.
3. The user switches changeover switch Q1 from switch position 2 (backup power mode) via switch position 0 to switch position 1 (grid operation). When switching via switch position 0, the inverter switches off immediately. This is ensured by the contacts of changeover switch Q1. In order to protect sensitive loads, it is recommended to remain in the zero position for at least 1 second during the switchover process from backup power mode to the public grid.
4. The inverter is connected to the entire home network and to the public grid again.
5. Communication between the inverter and the Fronius Smart Meter is restored.
6. Once the grid checks required by the applicable standards have been performed, the inverter can start feeding power into the grid again.

1. Installation

A quick-fastener system (3) is used to mount the connection area cover and front cover. The system is opened and closed with a half-rotation (180°) of the captive screw (1) into the quick-fastener spring (2).

The system is independent of torque.

1. Installation
2. General

A quick-fastener system (3) is used to mount the connection area cover and front cover. The system is opened and closed with a half-rotation (180°) of the captive screw (1) into the quick-fastener spring (2).

The system is independent of torque.

1. Installation
2. General

All components installed in the photovoltaic system must be compatible and have the necessary configuration options. The installed components must not restrict or negatively influence the functioning of the photovoltaic system.

1. Installation

Please observe the following criteria when choosing a location for the inverter:

		Only install on a solid, non-flammable surface.
		Max. ambient temperatures: -25 °C - +60 °C
		Relative humidity: 0 - 100%
		When installing the inverter in a switch cabinet or similar closed environment, it is necessary to make sure that the hot air that develops will be dissipated by forced-air ventilation. For more detailed information on inverter dimensions, refer to the chapter headed Dimensions of the inverter on page (→).
When installing the inverter on the outer walls of cattle sheds, it is important to maintain a minimum clearance of 2 m between all sides of the inverter and the ventilation and building openings.
The following substrates are permissible for installation: Walls (corrugated metal walls [mounting rails], brick walls, concrete walls, or other non-flammable surfaces sufficiently capable of bearing loads) Mast or beam (installed using mounting rails, behind the PV modules directly on the PV mounting system) Flat roofs (if this is for a film roof, make sure that the films comply with the fire protection requirements and are not highly flammable. Ensure compliance with the national provisions.) Covered parking lot roofs (no overhead installation)

		The inverter is suitable for indoor installation.
		The inverter is suitable for outdoor installation. Because of its IP 66 protection class, the inverter is not susceptible to water spray from any direction and can also be operated in moist environments.
		In order to keep inverter heating as low as possible, do not expose the inverter to direct sunlight.
		The inverter should be installed in a protected location, e.g., near the PV modules or under an overhanging roof.
		The inverter must not be installed or operated at more than 4000 m above sea level.
		Do not install the inverter: Where it may be exposed to ammonia, corrosive gases, acids, or salts (e.g., fertilizer storage areas, vent openings for livestock stables, chemical plants, tanneries)
		During certain operating phases the inverter may produce a slight noise. For this reason it should not be installed in an occupied living area.
		Do not install the inverter in: Areas where there is an increased risk of accidents from farm animals (e.g., horses, cattle, sheep, pigs) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, and fertilizers
		The inverter is essentially designed to be dustproof (IP 66). In areas of high dust accumulation, dust deposits may collect on the cooling surfaces, and thus impair the thermal performance. Regular cleaning is required in this case; see the chapter headed Operation in dusty environments on page (→). We therefore recommend not installing the inverter in areas and environments with high dust accumulation.
		Do not install the inverter in: Greenhouses Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds

1. Installation
2. Installation location and position

Please observe the following criteria when choosing a location for the inverter:

		Only install on a solid, non-flammable surface.
		Max. ambient temperatures: -25 °C - +60 °C
		Relative humidity: 0 - 100%
		When installing the inverter in a switch cabinet or similar closed environment, it is necessary to make sure that the hot air that develops will be dissipated by forced-air ventilation. For more detailed information on inverter dimensions, refer to the chapter headed Dimensions of the inverter on page (→).
When installing the inverter on the outer walls of cattle sheds, it is important to maintain a minimum clearance of 2 m between all sides of the inverter and the ventilation and building openings.
The following substrates are permissible for installation: Walls (corrugated metal walls [mounting rails], brick walls, concrete walls, or other non-flammable surfaces sufficiently capable of bearing loads) Mast or beam (installed using mounting rails, behind the PV modules directly on the PV mounting system) Flat roofs (if this is for a film roof, make sure that the films comply with the fire protection requirements and are not highly flammable. Ensure compliance with the national provisions.) Covered parking lot roofs (no overhead installation)

		The inverter is suitable for indoor installation.
		The inverter is suitable for outdoor installation. Because of its IP 66 protection class, the inverter is not susceptible to water spray from any direction and can also be operated in moist environments.
		In order to keep inverter heating as low as possible, do not expose the inverter to direct sunlight.
		The inverter should be installed in a protected location, e.g., near the PV modules or under an overhanging roof.
		The inverter must not be installed or operated at more than 4000 m above sea level.
		Do not install the inverter: Where it may be exposed to ammonia, corrosive gases, acids, or salts (e.g., fertilizer storage areas, vent openings for livestock stables, chemical plants, tanneries)
		During certain operating phases the inverter may produce a slight noise. For this reason it should not be installed in an occupied living area.
		Do not install the inverter in: Areas where there is an increased risk of accidents from farm animals (e.g., horses, cattle, sheep, pigs) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, and fertilizers
		The inverter is essentially designed to be dustproof (IP 66). In areas of high dust accumulation, dust deposits may collect on the cooling surfaces, and thus impair the thermal performance. Regular cleaning is required in this case; see the chapter headed Operation in dusty environments on page (→). We therefore recommend not installing the inverter in areas and environments with high dust accumulation.
		Do not install the inverter in: Greenhouses Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds

1. Installation
2. Installation location and position

IMPORTANT!
Refer to the manufacturer's documents for the suitable location for third-party batteries.

1. Installation
2. Installation location and position

		The inverter is suitable for vertical installation on a vertical wall or column.
		The inverter is suitable for a horizontal installation position.
		The inverter is suitable for installation on a sloping surface.
		Do not install the inverter on a sloping surface with its connection sockets at the top.
		Do not install the inverter at an angle on a vertical wall or column.
		Do not install the inverter horizontally on a vertical wall or pillar.
		Do not install the inverter on a vertical wall or pillar with its connection sockets facing upwards.
		Do not install the inverter overhanging with the connection sockets at the top.
		Do not install the inverter overhanging with the connection sockets at the bottom.
		Do not install the inverter on the ceiling.

1. Installation

Use the corresponding fixing materials depending on the subsurface and observe the screw dimension recommendations for the mounting bracket.
The installer is responsible for selecting the right type of fixing.

1. Installation
2. Installing the mounting bracket and attaching the inverter

Use the corresponding fixing materials depending on the subsurface and observe the screw dimension recommendations for the mounting bracket.
The installer is responsible for selecting the right type of fixing.

1. Installation
2. Installing the mounting bracket and attaching the inverter

The mounting bracket (illustration) is also used as the gage.

The pre-drilled holes on the mounting bracket are intended for screws with a thread diameter of 6-8 mm (0.24-0.32 inches).

Unevenness on the installation surface (for example, coarse-grained plaster) is largely counterbalanced by the mounting bracket.

1. Installation
2. Installing the mounting bracket and attaching the inverter

1. Installation
2. Installing the mounting bracket and attaching the inverter

IMPORTANT!
When installing the mounting bracket, make sure that it is installed with the arrow pointing upwards.

1

2

3

1. Installation
2. Installing the mounting bracket and attaching the inverter

When installing the inverter on a mast or beam, Fronius recommends using the "Pole clamp" (order no. SZ 2584.000) mounting kit from Rittal GmbH.

The "Pole clamp" kit covers the following dimensions:

• Rectangular mast or beam with a side length of 50-150 mm (1.97-5.91 inches)
• Round mast or beam with a diameter of 40-190 mm (1.57-7.48 inches)

1. Installation
2. Installing the mounting bracket and attaching the inverter

IMPORTANT!
The mounting bracket must be affixed at a minimum of four points.

1. Installation
2. Installing the mounting bracket and attaching the inverter

There are integrated grips on the side of the inverter which facilitate lifting/attaching.

1

Clip the inverter into the mounting bracket from above. The connections must point downwards.

Push the lower part of the inverter into the snap-in tabs of the mounting bracket until the inverter audibly clicks into place on both sides.

Check that the inverter is correctly positioned on both sides.

1. Installation

Single-core	Multi-stranded	Fine-stranded	Fine-stranded with ferrule and collar	Fine-stranded with ferrule without collar

1. Installation
2. Requirements for connecting the inverter

Single-core	Multi-stranded	Fine-stranded	Fine-stranded with ferrule and collar	Fine-stranded with ferrule without collar

1. Installation
2. Requirements for connecting the inverter

Round copper conductors can be connected to the terminals of the inverter as described below.

Grid connections with push-in terminal* Select a sufficiently large cable cross-section based on the actual device output.
Number of pins
5	2.5-10 mm2	2.5-10 mm2	2.5-10 mm2	2.5-6 mm2	2.5-6 mm2

Grid connections backup power with push-in terminal* Select a sufficiently large cable cross-section based on the actual device output.
Number of pins
3	1.5-10 mm2	1.5-10 mm2	1.5-10 mm2	1.5-6 mm2	1.5-6 mm2

PV/BAT connections with push-in terminal** Select a sufficiently large cable cross-section based on the actual device output.
Number of pins
2 x 4	4-10 mm2	4-10 mm2	4-10 mm2	4-6 mm2	4-6 mm2

Ground electrode terminal Select a sufficiently large cable cross-section based on the actual device output.
Number of pins
2	2.5-16 mm2	2.5-16 mm2	2.5-16 mm2	2.5-16 mm2	2.5-16 mm2
4	2.5-10 mm2	2.5-10 mm2	2.5-10 mm2	2.5-10 mm2	2.5-10 mm2

1. Installation
2. Requirements for connecting the inverter

• Copper: round, solid
• Copper: round, fine-stranded

IMPORTANT!
If several single conductors are connected to an input of the push-in terminals, connect the single conductors with a corresponding ferrule.

WSD connections with push-in terminal
Distance	Stripping length					Cable recommendation
100 m 109 yd	10 mm 0.39 inch	0.14 - 1.5 mm2 AWG 26 - 16	0.14 - 1.5 mm2 AWG 26 - 16	0.14 - 1 mm2 AWG 26 - 18	0.14 - 1.5 mm2 AWG 26 - 16	min. CAT 5 UTP (unshielded twisted pair)

Modbus connections with push-in terminal
Distance	Stripping length					Cable recommendation
300 m 328 yd	10 mm  0.39 inch	0.14 - 1.5 mm2 AWG 26 - 16	0.14 - 1.5 mm2 AWG 26 - 16	0.14 - 1 mm2 AWG 26 - 18	0.14 - 1.5 mm2 AWG 26 - 16	min. CAT 5 STP (shielded twisted pair)

IO connections with push-in terminal
Distance	Stripping length					Cable recommendation
30 m 32 yd	10 mm  0.39 inch	0.14 - 1.5 mm2 AWG 26 - 16	0.14 - 1.5 mm2 AWG 26 - 16	0.14 - 1 mm2 AWG 26 - 18	0.14 - 1.5 mm2 AWG 26 - 16	Single conductors possible

1. Installation
2. Requirements for connecting the inverter

For a standard M32 cable gland with a reducer:
7-15 mm

For a standard M32 cable gland without a reducer:

With cable diameters greater than 21 mm, the M32 cable gland must be replaced by an M32 cable gland with a larger clamping area—item number: 42,0407,0780—strain-relief device M32 x 1.5 KB 18-25.

1. Installation
2. Requirements for connecting the inverter

Cable diameter for the strain-relief device: max. 9 mm.
.Cable diameter for the connection to the push-in terminal: max. 6 mm

IMPORTANT!
For double-insulated cables with a cable diameter over 6 mm, the external insulation layer must be removed to connect to the push-in terminal.

1. Installation
2. Requirements for connecting the inverter

NOTE!

The national regulations of the grid operator or other factors may require a residual current circuit breaker in the AC connection lead.

For this situation, a type A residual current circuit breaker is generally adequate. Nevertheless, false alarms can be triggered for the type A residual current circuit breaker in individual cases and depending on local conditions. For this reason, in accordance with national legislation, Fronius recommends that a residual current circuit breaker with a tripping current of at least 100 mA suitable for frequency converters be used.

IMPORTANT!
As a maximum, the inverter can be used with an automatic circuit breaker 32 A.

1. Installation

1. Installation
2. Connecting the inverter to the public grid (AC side)

1. Installation
2. Connecting the inverter to the public grid (AC side)

1.

Tools required: TX20 screwdriver

2.

Make the PE ground conductor longer and lay it in a loop to allow for movement.

3.

Tools required: Crimping tool

4.

Only one conductor may be connected to each pin.

1

Turn off the automatic circuit breaker. Set the DC disconnector to the "Off" switch position.

2

Loosen the 5 screws of the connection area cover by rotating them 180° to the left using a screwdriver (TX20).
Remove the connection area cover from the device.

3

Press the lock on the back of the terminal and remove the AC terminal.
Route the mains cable from below through the cable gland on the right side and the ferrite core.

IMPORTANT!
The ground conductor should not be routed through the ferrite core, it should be dimensioned longer and laid in a loop to allow for movement so that it is strained last in the event of failure of the cable gland.
For more information on the cable gland, see Cable diameter of the AC cable on page(→).

4

Strip the insulation of the single conductors by 12 mm. Select the cable cross-section in accordance with the instructions in Permissible cables for the electrical connection on page (→).
Lift to open the terminal's operating lever and insert the stripped single conductor into the slot provided as far as it will go. Then close the operating lever until it engages.

IMPORTANT!
Only one conductor may be connected to each pin. The AC cables can be connected to the AC terminal without ferrules.

5

L1	Phase conductor
L2	Phase conductor
L3	Phase conductor
N	Neutral conductor
PE	Ground conductor

6

Insert the AC terminal into the AC slot until it engages. Fasten the union nut of the cable gland with a torque of 6‑7 Nm.

1. Installation

To enable suitable PV modules to be chosen and to use the inverter as efficiently as possible, it is important to bear the following points in mind:

• If insolation is constant and the temperature is falling, the open-circuit voltage of the PV modules will increase. The open-circuit voltage must not exceed the maximum permissible system voltage. If the open-circuit voltage exceeds the specified values, the inverter will be destroyed and all warranty claims will be forfeited.
• The temperature coefficients on the data sheet of the PV modules must be observed.
• Exact values for sizing the PV modules can be obtained using suitable calculation tools, such as the Fronius Solar.creator.

IMPORTANT!
Before connecting up the PV modules, check that the voltage for the PV modules specified by the manufacturer corresponds to the actual measured voltage.

IMPORTANT!
The PV modules connected to the inverter must comply with the IEC 61730 Class A standard.

IMPORTANT!
Solar module strings must not be earthed.

1. Installation
2. Connecting solar module strings to the inverter

To enable suitable PV modules to be chosen and to use the inverter as efficiently as possible, it is important to bear the following points in mind:

• If insolation is constant and the temperature is falling, the open-circuit voltage of the PV modules will increase. The open-circuit voltage must not exceed the maximum permissible system voltage. If the open-circuit voltage exceeds the specified values, the inverter will be destroyed and all warranty claims will be forfeited.
• The temperature coefficients on the data sheet of the PV modules must be observed.
• Exact values for sizing the PV modules can be obtained using suitable calculation tools, such as the Fronius Solar.creator.

IMPORTANT!
Before connecting up the PV modules, check that the voltage for the PV modules specified by the manufacturer corresponds to the actual measured voltage.

IMPORTANT!
The PV modules connected to the inverter must comply with the IEC 61730 Class A standard.

IMPORTANT!
Solar module strings must not be earthed.

1. Installation
2. Connecting solar module strings to the inverter

1. Installation
2. Connecting solar module strings to the inverter

Two independent PV inputs (PV 1 and PV 2) are available. These inputs can be connected to a different number of modules.

When starting for the first time, set up the PV Generator in accordance with the respective configuration (can also be carried out at a later date in the Device Configuration > Components menu area).

1. Installation
2. Connecting solar module strings to the inverter

IMPORTANT!
The installation must be carried out in accordance with the nationally applicable standards and directives. If the Arc Fault Circuit Interrupter integrated in the inverter is used for the requirement according to IEC 63027 for arc detection, the solar module strings must not be combined in front of the inverter.

Current less than or equal to 25 A (I_dcmax).

Module array settings:
PV 1: ON
PV 2: OFF

Combined solar module strings with total current less than or equal to 25 A (I_dcmax).

Module array settings:
PV 1: ON
PV 2: OFF

Combined solar module strings with total current greater than 25 A (I_dcmax).

Module array settings:
PV 1: ON
PV 2: OFF
PV 1 + PV 2 (connected in parallel): ON

IMPORTANT!
The maximum current load of a single terminal is 25 A. PV‑connection strings with a total current of more than 25 A must be split between both PV inputs upstream of the terminals (I_{SC max} ≤ 60 A). The plug connection for splitting the total current must be sufficiently dimensioned, suitable, and correctly installed. Splitting the current by bridging from PV 1 to PV 2 at the terminal is not permitted.

PV 1 less than or equal to 40 A (I_{SC PV1})
PV 2 less than or equal to 20 A (I_{SC PV2})

Module array settings:
PV 1: ON
PV 2: ON

1. Installation
2. Connecting solar module strings to the inverter

1.

WARNING! An electric shock can be fatal.

2.

Push the cables through the DC bushing before stripping the insulation.

3.

Tools required: Crimping tool

4.

Only one conductor may be connected to each pin.

1

2

Push the DC cables through the DC bushings by hand.

IMPORTANT!
Push the cables through the DC bushing before stripping them in order to avoid twisting/bending single wires.

3

4

5

Select the cable cross-section in accordance with the instructions in Permissible cables for the electrical connection from page (→).
Strip the insulation of the single conductors by 12 mm. Lift to open the terminal's operating lever and insert the stripped single conductor into the slot provided, in each case as far as it will go. Then close the operating lever until it engages.

WARNING!

Danger from loose and/or incorrectly clamped single conductors in the terminal.

This can result in severe personal injury and damage to property.

Only connect one single conductor at each slot provided in the terminal.

Check that the single conductors are secure in the terminal.

Make sure that the single conductor has been fully inserted into the terminal and that no single wires are protruding out of the terminal.

6

 

7

8

Use a suitable measuring instrument to check the voltage and polarity of the DC cabling. Remove both DC terminals from the slots.

CAUTION!

Danger due to polarity reversal at the terminals.

This may result in severe damage to the inverter.

Use a suitable measuring instrument to check the polarity of the DC cabling.

Use a suitable measuring instrument to check the voltage (max. 1000 V_DC)

9

Insert the DC terminals into the respective slot until they engage. Fasten the screws of the strain-relief device to the housing using a screwdriver (TX20) and a torque of 1.3 - 1.5 Nm.

NOTE!

Risk due to overtorque at the strain-relief device.

Damage to the strain-relief device may result.

Do not use a drill driver.

1. Installation

1. Installation
2. Connecting the battery to the inverter

1. Installation
2. Connecting the battery to the inverter

IMPORTANT!
Prior to installing a battery, ensure that the battery is switched off. The max. DC cable length for the installation of third-party batteries must be taken into account according to the specifications of the manufacturer, see chapter Suitable batteries on page (→).

1.

Tools required: Screwdriver TX20

2.

Connect the ground conductor of the battery at an external point.

3.

Only one conductor may be connected to each pin.

4.

Use a suitable measuring instrument to check the polarity of the DC cabling when the battery is switched on.

5.

Tools required: Screwdriver TX20

1

Push the battery cables through the DC bushings by hand.

* The battery ground conductor must be connected externally (e.g., switch cabinet). When connecting an LG FLEX battery, the battery ground conductor can be connected in the inverter (see chapter Connecting the LG FLEX ground conductor on page (→). Observe the minimum cross-section of the battery ground conductor.

IMPORTANT!
Push the cables through the DC bushing before stripping them in order to avoid twisting/bending single wires.

2

3

* See the battery manufacturer's operating instructions for the minimum cable cross-section.

Select the cable cross-section in accordance with the instructions in Permissible cables for the electrical connection from page (→).
Strip the insulation of the single conductors by 12 mm. Lift to open the terminal's operating lever and insert the stripped single conductor into the slot provided, in each case as far as it will go. Then close the operating lever until it engages.

WARNING!

Danger from loose and/or incorrectly clamped single conductors in the terminal.

This can result in severe personal injury and damage to property.

Only connect one single conductor at each slot provided in the terminal.

Check that the single conductors are secure in the terminal.

Make sure that the single conductor has been fully inserted into the terminal and that no single strands are protruding out of the terminal.

4

5

CAUTION!

Danger due to overvoltage when using other slots on the terminal.

This may result in damage to the battery and/or the PV modules due to discharge.

Only use the slots labelled 'BAT' for connecting the battery.

 

6

CAUTION!

Danger due to polarity reversal at the terminals.

Serious damage to the PV system may result.

Use a suitable measuring instrument to check the polarity of the DC cabling when the battery is switched on.

The maximum voltage for the battery input must not be exceeded (see Technical data on page (→)).

7

Insert the DC terminals into the respective slot until they engage.

8

Fasten the screws of the cable guide to the housing using a screwdriver (TX20) and a torque of 1.3 - 1.5 Nm.

NOTE!

Risk due to overtorque at the strain-relief device.

Damage to the strain-relief device may result.

Do not use a drill driver.

IMPORTANT!
Information for connection on the battery side can be found in the installation instructions from the relevant manufacturer.

1. Installation
2. Connecting the battery to the inverter

1

Route the battery ground conductor into the integrated cable duct of the connection area divider and into the AC connection area.

2

Fasten the battery ground conductor to the second input of the ground electrode terminal from the top using a screwdriver (TX20) and a torque of 1.8-2 Nm.

IMPORTANT!
Information for connection on the battery side can be found in the Installation Instructions from the relevant manufacturer.

1. Installation

IMPORTANT!
The valid national laws, standards, and provisions, as well as the specifications of the relevant grid operator are to be taken into account and applied.
It is highly recommended that the specific installation be agreed with the grid operator and explicitly approved by this operator. This obligation applies to system constructors in particular (e.g., installers).

1. Installation
2. Connecting backup power - PV Point (OP)

IMPORTANT!
The valid national laws, standards, and provisions, as well as the specifications of the relevant grid operator are to be taken into account and applied.
It is highly recommended that the specific installation be agreed with the grid operator and explicitly approved by this operator. This obligation applies to system constructors in particular (e.g., installers).

1. Installation
2. Connecting backup power - PV Point (OP)

For the circuit diagram recommended by Fronius, see Appendix: Emergency power terminal—PV Point (OP) on page (→).

1

Switch off the automatic circuit breaker and DC disconnector. Turn the DC disconnector to the "off" switch setting.

2

Loosen the 5 screws of the connection area cover by rotating them 180° to the left using a screwdriver (TX20).
Remove the connection area cover from the device.

CAUTION!

Danger from faulty or incorrect bores.

This may lead to injuries to the eyes and hands as a result of flying debris and sharp edges, as well as damage to the inverter.

When drilling, wear suitable protective goggles.

Only use a step drill when drilling.

Ensure that nothing on the inside of the device is damaged (e.g., the connection block).

Adapt the diameter of the bore to match the corresponding connection.

Deburr the bores using a suitable tool.

Remove the drilling residues from the inverter.

3

Drill out the optional cable guide with a step drill.

4

Insert the cable gland into the bore and fasten it using the torque specified by the manufacturer.

5

Guide the mains cable through the cable gland from below.
Remove the OP terminal.

6

Strip the insulation of the single conductors by 12 mm.
The cable cross-section must be between 1.5 mm² and 10 mm². Lift to open the terminal's operating lever and insert the stripped single conductor into the slot provided, all the way up to the stop. Then close the operating lever until it engages.

WARNING!

Danger from loose and/or incorrectly clamped single conductors in the terminal.

This can result in severe personal injury and damage to property.

Only connect one single conductor at each slot provided in the terminal.

Check that the single conductors are secure in the terminal.

Make sure that the single conductor has been fully inserted into the terminal and that no single wires are protruding out of the terminal.

7

L1´	Phase conductor
N´	Neutral conductor
N´	PEN conductor

IMPORTANT!
The PEN conductor must be produced with ends that are permanently marked blue, according to the national provisions, and have a cross-section of 10 mm².

8

Fasten the ground conductor and PEN conductor to the ground electrode terminal using a screwdriver (TX20) and a torque of 1.8 - 2 Nm.

9

Insert the OP terminal into the OP slot until it engages. Tighten the union nut of the cable gland to the torque specified by the manufacturer.

1. Installation
2. Connecting backup power - PV Point (OP)

• During the initial installation and configuration
• After working on the switch cabinet
• During ongoing operation (recommendation: at least once a year)

For test mode, a battery charge of min. 30% is recommended.

A description on how to run test mode can be found in the backup power checklist (https://www.fronius.com/en/search-page, item number: 42,0426,0365).

1. Installation

IMPORTANT!
The valid national laws, standards, and provisions, as well as the specifications of the relevant grid operator are to be taken into account and applied.
It is highly recommended to coordinate the concrete examples implemented and in particular the specific installation with the grid operator to obtain their explicit approval. This obligation applies to system constructors in particular (e.g., installers).
The examples suggested here show a backup power supply with or without an external protection relay (external grid and system protection unit). The respective grid operator decides whether an external protection relay must be used or not.

IMPORTANT!
An uninterruptible power supply (UPS) may only be used to supply individual loads (e.g., computers). Feeding into the power supply of the house network is not permitted. The Installation and Operating Instructions must be read carefully prior to use. If anything is unclear, contact your vendor immediately.

The examples given in this document (in particular cabling variants and circuit diagrams) are suggestions only. These examples have been carefully developed and tested. They can therefore be used as a basis for real-life installation. Anyone following or using these examples does so at their own risk.

1. Installation
2. Connecting backup power - Full Backup

IMPORTANT!
The valid national laws, standards, and provisions, as well as the specifications of the relevant grid operator are to be taken into account and applied.
It is highly recommended to coordinate the concrete examples implemented and in particular the specific installation with the grid operator to obtain their explicit approval. This obligation applies to system constructors in particular (e.g., installers).
The examples suggested here show a backup power supply with or without an external protection relay (external grid and system protection unit). The respective grid operator decides whether an external protection relay must be used or not.

IMPORTANT!
An uninterruptible power supply (UPS) may only be used to supply individual loads (e.g., computers). Feeding into the power supply of the house network is not permitted. The Installation and Operating Instructions must be read carefully prior to use. If anything is unclear, contact your vendor immediately.

The examples given in this document (in particular cabling variants and circuit diagrams) are suggestions only. These examples have been carefully developed and tested. They can therefore be used as a basis for real-life installation. Anyone following or using these examples does so at their own risk.

1. Installation
2. Connecting backup power - Full Backup

IMPORTANT!
The cabling variant required by the utility must be clarified with the utility.

• Appendix: Automatic switch to backup power 3-pin single FRT-capable separation - e.g., Austria on page (→).
• Appendix: Automatic switch to backup power 3-pin single separation - e.g., Australia on page (→).

Cabling of the backup power circuits and non-backup power circuits:
If not all the loads in the home need to be supplied in a backup power situation, the circuits need to be divided into backup power circuits and non-backup power circuits. The total load of the backup power circuits must not exceed the rated power of the inverter.

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (e.g., residual current circuit breaker, automatic circuit breaker).
In backup power mode, only the backup power circuits are disconnected from the grid at 3 poles by contactor K1. In this case the rest of the home network is not supplied.

• The main contacts of contactor K1 must be installed between the Fronius Smart Meter and the inverter or the residual current circuit breakers of the backup power circuits.
• The supply voltage for contactor K1 is provided by the public grid and must be connected to phase 1 (L1) downstream of the Fronius Smart Meter and fused accordingly.
• An NC contact for relay K3 interrupts the supply voltage to contactor K1. This prevents the backup power network of the inverter from being switched to the public grid.
• The NO contact of relay K3 gives feedback to the inverter that relay K3 has blocked the power.
• Additional inverters or other AC sources can be installed in the backup power circuit downstream of the main contacts of K1. The sources will not synchronize with the network of the inverter because this backup power network has a frequency of 53 Hz.

1. Installation
2. Connecting backup power - Full Backup

• Appendix: Automatic switch to backup power 4-pin single separation - e.g., Germany on page (→).
• Appendix: Automatic switch to backup power 4-pin single FRT-capable separation on page (→).
• Appendix: Automatic switch to backup power 4-pin single separation - e.g., France on page (→).
• Appendix: Automatic switch to backup power 4-pin single separation - e.g., Spain on page (→).

Cabling of the backup power circuits and non-backup power circuits:
If not all the loads in the home need to be supplied in a backup power situation, the circuits need to be divided into backup power circuits and non-backup power circuits. The total load of the backup power circuits must not exceed the rated power of the inverter.

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (e.g., residual current circuit breaker, automatic circuit breaker).
In backup power mode, only the backup power circuits are disconnected from the grid at all poles by contactor K1, and a ground connection is established for them. In this case the rest of the home network is not supplied.

• The main contacts of contactor K1 must be installed between the Fronius Smart Meter and the inverter or the residual current circuit breakers of the backup power circuits.
• The supply voltage for contactor K1 is provided by the public grid and must be connected to phase 1 (L1) downstream of the Fronius Smart Meter and fused accordingly.
• To ensure residual current circuit breakers function in backup power mode, the connection between the neutral conductor and the ground conductor must be implemented in accordance with the respective circuit diagram. An NC contact is used for this purpose for each of the main contacts of contactors K4 and K5. This ensures that the ground connection is established as soon as the public grid connection is no longer available.
• As with contactor K1, the supply voltage for contactors K4 and K5 is supplied via phase 1 (L1) of the public grid.
• An NC contact for relay K3 interrupts the supply voltage to contactors K1, K4, and K5. This prevents the ground connection from being immediately disconnected again when power returns to the public grid and the backup power network of the inverter from being switched to the public grid.
• The NO contact of relay K3 gives feedback to the inverter on whether relay K3 has blocked the power.
• Additional inverters or other AC sources can be installed in the backup power circuit downstream of the main contacts of K1. The sources will not synchronize with the network of the inverter because this backup power network has a frequency of 53 Hz.

1. Installation
2. Connecting backup power - Full Backup

• Appendix: Automatic switch to backup power 4-pin double separation with ext. grid and system protection - e.g., Italy on page (→).

Cabling of the backup power circuits and non-backup power circuits:

IMPORTANT!
For this circuit variant, the Fronius Smart Meter US-480 must be used.

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (e.g., residual current circuit breaker, automatic circuit breaker).
In backup power mode, only the backup power circuits are disconnected from the grid by contactors K1 and K2, and a ground connection is established for them. In this case the rest of the home network is not supplied.

• The main contacts of contactors K1 and K2 must be installed between the Fronius Smart Meter and the residual current circuit breaker of the inverter or the residual current circuit breakers of the backup power circuits.
• The supply voltage for contactors K1 and K2 is provided by the public grid and must be connected to phase 1 (L1) downstream of the Fronius Smart Meter and fused accordingly.
• Actuation of contactors K1 and K2 is carried out by the external grid and system protection.
• The external grid and system protection unit must be installed downstream of the Fronius Smart Meter. Detailed installation and wiring instructions for external grid and system protection units can be found in the unit's operating instructions.
• The remote trip input of the external grid and system protection unit must be set to NC according to the manufacturer's operating instructions.
• To ensure residual current circuit breakers function in backup power mode, the connection between the neutral conductor and the ground conductor must be established as close as possible to the inverter, but in any case upstream of the first residual current circuit breaker. An NC contact is used for this purpose for the main contacts of contactors K4 and K5. This ensures that the ground connection is established as soon as the public grid connection is no longer available.
• The supply voltage for the contactors K1, K2, K4, and K5 is supplied via phase 1 (L1) of the public grid and is switched via the external grid and system protection unit.
• An NC contact for relay K3, which activates the remote input of the external grid and system protection unit, interrupts the supply voltage to contactors K1, K2, K4, and K5. This prevents the ground connection from being immediately disconnected again when power returns to the public grid and the backup power network of the inverter from being switched to the public grid.
• The NO contact of relay K3 gives additional feedback to the inverter on whether relay K3 has blocked the power.
• Additional inverters or other AC sources can be installed in the backup power circuit downstream of the main contacts of K1 and K2. The sources will not synchronize with the network of the inverter because this backup power network has a frequency of 53 Hz.

1. Installation
2. Connecting backup power - Full Backup

• Appendix: Manual switch to backup power 3-pin separation, e.g., Austria on page (→).
• Appendix: Manual switch to backup power 4-pin separation, e.g., Germany on page (→).

IMPORTANT!
The circuit diagrams to be used must be applied in line with the country standard and the implementing regulations of the utility.

Cabling of the backup power circuits and non-backup power circuits:
If not all the loads in the home need to be supplied in a backup power situation, the circuits need to be divided into backup power circuits and non-backup power circuits. The total load of the backup power circuits must not exceed the rated power of the inverter.

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (e.g., residual current circuit breaker, automatic circuit breaker).
In backup power mode, only the backup power circuits and the inverter are disconnected from the grid by changeover switch Q1. In the case of all-pole disconnection, a ground connection is also established. In this case, the loads in the non-backup power circuits are not supplied by the inverter.

• The changeover switch Q1 must be dimensioned for the fuses installed upstream, the max. occurring amperage, and the max. occurring short circuit current. An auxiliary switching element with 2 NO contacts is required for switch position 1 (grid operation) to match the installed changeover switch Q1.
  The changeover switch Q1 used must fulfil a short-circuit breaking capacity of at least 10 kA according to standard IEC 60947-1. If the short circuit current at the installation point reaches a value above 10 kA, a switch with a corresponding short-circuit breaking capacity must be used.
• The circuitry is only to be used in household-like applications and systems (small businesses and agriculture) or up to upstream fuses with a nominal current of 63 A.
• Min. impulse withstand voltage of the changeover switch of 4 kV according to IEC 60947-1.
• It must be clarified with the utility whether the 3-pole or all-pole disconnection must be used.
• The protective measure must be tested regularly; if this is not regulated by law, it must be performed annually.
• Data transfer between the Fronius Smart Meter and the inverter may be interrupted in backup power mode (switch position 2). This is optionally ensured via a NO contact of the auxiliary contact. Interrupting the Smart Meter connection via auxiliary contact Q1.1 is optional and prevents the backup power function from ending when power returns to the public grid. If this does not take place, the inverter interrupts the backup power supply when power returns to the public grid. Failure to manually switch to parallel grid mode within the first 10 minutes of the power returning to the public grid may cause the inverter and battery to shut down. In this case, a manual system start must be carried out (see chapter Manual system start on page (→)). This behavior must be taken into account especially during a test of manual switching, because the inverter does not start backup power mode when there is a grid connection due to Smart Meter data being available.
• The data communication connection with the Fronius Smart Meter must be established separately from the battery to its dedicated Modbus input so that battery data communication is maintained (see chapter Modbus participants on page (→)).
• Feedback to the digital inputs (IOs) of the inverter via the changeover switch Q1 (switch position 2) is a starting condition for the inverter's backup power mode.
• The AC output of the inverter is de-energized when switching via switch position 0. This is ensured by interrupting the WSD line with the 2nd NO contact of the auxiliary contact and the changeover switch Q1 in position 0.
• The continuous connection between the equipotential bonding rail and the neutral conductor from the inverter must not be interrupted in the case of 3-pole disconnection.
• In the case of all-pole disconnection, the PE-N conductor connection is made via the main contacts of changeover switch Q1 in duplicate.
• Additional inverters or other AC sources can be installed in the backup power circuit downstream of the changeover switch Q1. The sources will not synchronize with the backup power network of the inverter in a backup power situation because this is operated at 53 Hz.

1. Installation
2. Connecting backup power - Full Backup

• During the initial installation and configuration
• After working on the switch cabinet
• During ongoing operation (recommendation: at least once a year)

For test mode, a battery charge of min. 30% is recommended.

A description on how to run test mode can be found in the backup power checklist (https://www.fronius.com/en/search-page, item number: 42,0426,0365).

1. Installation

The inputs M0 and M1 can be freely selected. A maximum of four Modbus participants can be connected to the Modbus terminal at inputs M0 and M1.

IMPORTANT!
Only one primary meter, one battery, and one Ohmpilot can be connected per inverter. Due to the high data transfer of the battery, the battery occupies two subscribers. If the Inverter Control via Modbus function is activated in the Communication > Modbus menu area, no Modbus participants are possible. It is not possible to send and receive data at the same time.

Example 1:

Input	Battery	Fronius Ohmpilot	Number of primary meters	Number of secondary meters
Modbus 0 (M0)			0	4
			0	2
			0	1
Modbus 1 (M1)			1	3

Example 2:

Input	Battery	Fronius Ohmpilot	Number of primary meters	Number of secondary meters
Modbus 0 (M0)			1	3
Modbus 1 (M1)			0	4
			0	2
			0	1

1. Installation
2. Connecting the data communication cables

The inputs M0 and M1 can be freely selected. A maximum of four Modbus participants can be connected to the Modbus terminal at inputs M0 and M1.

IMPORTANT!
Only one primary meter, one battery, and one Ohmpilot can be connected per inverter. Due to the high data transfer of the battery, the battery occupies two subscribers. If the Inverter Control via Modbus function is activated in the Communication > Modbus menu area, no Modbus participants are possible. It is not possible to send and receive data at the same time.

Example 1:

Input	Battery	Fronius Ohmpilot	Number of primary meters	Number of secondary meters
Modbus 0 (M0)			0	4
			0	2
			0	1
Modbus 1 (M1)			1	3

Example 2:

Input	Battery	Fronius Ohmpilot	Number of primary meters	Number of secondary meters
Modbus 0 (M0)			1	3
Modbus 1 (M1)			0	4
			0	2
			0	1

1. Installation
2. Connecting the data communication cables

• Depending on the number and cross-section of the wired data communication cables, remove the corresponding blanking plugs from the sealing insert and insert the data communication cables.
• Make sure that you insert the corresponding blanking plugs into any free openings on the sealing insert.

IMPORTANT!
Should the blanking plugs be missing or improperly fitted, then safety class IP66 cannot be guaranteed.

1.

Loosen the union nut, push out the sealing ring, and remove the corresponding blanking plug.

1

Undo the cable gland union nut and push out the sealing ring and the blanking plug from the inside of the device.

2

Open up the sealing ring at the location where the blanking plug is to be removed.

* Liberate the blanking plug by moving it sideways.

3

Guide the data cables first through the cable gland union nut and then through the housing opening.

4

Insert the sealing ring between the union nut and the housing opening. Press the data cables into the seal's cable guide. Then press in the seal until it reaches the underside of the cable gland.

5

Tighten the union nut for the cable gland to a torque of min. 2.5 to max. 4 Nm.

1. Installation
2. Connecting the data communication cables

1

Strip 10 mm from the single conductors and mount the ferrules if necessary.

IMPORTANT!
Connect the individual conductors to an appropriate ferrule if several individual conductors are connected to one input of the push-in terminals.

2

Insert the cable into the respective slot and check the cable is securely retained.

IMPORTANT!
Use only twisted pairs for connecting "Data +/-" and "Enable +/-", see Permitted cables for the data communication connection on page (→).

Twist the cable shield and insert into the "SHIELD" slot.

IMPORTANT!
Improperly fitted shielding can cause data communication problems.

For the wiring proposal recommended by Fronius, see page (→).

1. Installation
2. Connecting the data communication cables

It may be possible for the system to function without terminating resistors. However, owing to interference, the use of terminating resistors according to the following overview is recommended for trouble-free operation.

For permissible cables and max. distances for the data communication area, refer to the chapter headed Permitted cables for the data communication connection on page (→).

IMPORTANT!
Terminating resistors that are not positioned as illustrated can result in interference in the data communication.

1. Installation
2. Connecting the data communication cables

IMPORTANT!
The push-in WSD terminal in the inverter's connection area is delivered with a bypass ex works as standard. The bypass must be removed when installing a trigger device or a WSD chain.

The WSD switch of the first inverter with connected trigger device in the WSD chain must be in position 1 (master). The WSD switch of all other inverters should be in position 0 (slave).

Max. distance between two devices: 100 m
Max. Number of devices: 28

* Floating contact of the trigger device (e.g., central grid and system protection). If several floating contacts are used in a WSD chain, these must be connected in series.

1. Installation

1

Place the cover on the connection area. Tighten the five screws by rotating them 180° to the right in the indicated order using a screwdriver (TX20).

2

Clip the housing cover onto the inverter from above.
Press on the lower part of the housing cover and tighten the two screws 180° to the right using a TORX® screwdriver (TX20).
Turn the DC disconnector to the "On" switch position. Switch on the automatic circuit breaker. For systems with a battery, observe the switch-on sequence as per chapter Suitable batteries on page (→).

IMPORTANT! Open WLAN access point with the optical sensor, see chapter Button functions and LED status indicator on page (→)

1. Installation
2. Closing and commissioning the inverter

1

Place the cover on the connection area. Tighten the five screws by rotating them 180° to the right in the indicated order using a screwdriver (TX20).

2

Clip the housing cover onto the inverter from above.
Press on the lower part of the housing cover and tighten the two screws 180° to the right using a TORX® screwdriver (TX20).
Turn the DC disconnector to the "On" switch position. Switch on the automatic circuit breaker. For systems with a battery, observe the switch-on sequence as per chapter Suitable batteries on page (→).

IMPORTANT! Open WLAN access point with the optical sensor, see chapter Button functions and LED status indicator on page (→)

1. Installation
2. Closing and commissioning the inverter

When starting the inverter for the first time, various setup settings must be configured.

If the setup is canceled before completion, the input data is not saved and the start screen with the installation wizard is shown once again. The data is saved in the event of an interruption, e.g., a power failure. Commissioning is continued at the point at which the interruption occurred after the power supply is restored. If the setup was interrupted, the inverter feeds energy into the grid at maximum 500 W and the operating status LED flashes yellow.

The country setup can only be set when starting the inverter for the first time. If the country setup needs to be changed at a later date, contact your installer/technical support.

1. Installation
2. Closing and commissioning the inverter

The Fronius Solar.start app is required for installation. Depending on the mobile device used to perform the installation, the app is available on the relevant platform.

1Download and install the Fronius Solar.start app.

2Open the access point by touching the sensor    .

✓Communications LED flashes blue.

3Open the Fronius Solar.start app and follow the installation wizard. Scan the QR code on the rating plate with a smartphone or tablet to connect to the inverter.

4Add system components in Fronius Solar.web and commission the PV system.

The network wizard and product setup can be performed independently. A network connection is required for the Fronius Solar.web installation wizard.

1. Installation
2. Closing and commissioning the inverter

WLAN:

1Open the access point by touching the sensor   

✓Communications LED flashes blue.

2Establish the connection to the inverter in the network settings (the inverter is displayed with the name "FRONIUS_" and the serial number of the device).

3Enter the password from the rating plate and confirm.
IMPORTANT!
To enter the password in Windows 10, first select the Connect using a security key instead link to be able to establish the connection with the password.

4Enter the IP address 192.168.250.181 in the address bar of the browser and confirm. The installation wizard opens.

5Follow the installation wizard and complete the installation in the individual areas.

6Add the system components in Fronius Solar.web and commission the PV system.

The network wizard and product setup can be performed independently. A network connection is required for the Fronius Solar.web installation wizard.

Ethernet:

1Establish a connection to the inverter (LAN1) using a network cable (min. CAT5 STP).

2Open the access point by touching the sensor once   

✓Communications LED flashes blue.

3Enter the IP address 169.254.0.180 in the address bar of the browser and confirm. The installation wizard opens.

4Follow the installation wizard and complete the installation in the individual areas.

5Add the system components in Fronius Solar.web and commission the PV system.

The network wizard and product setup can be performed independently. A network connection is required for the Fronius Solar.web installation wizard.

1. Installation

1

1. Turn off the automatic circuit breaker.
2. Turn the DC disconnector to the "off" switch setting.

To start up the inverter again, follow the steps listed above in reverse order.

IMPORTANT!
Wait for the capacitors of the inverter to discharge!

1. Installation
2. De-energizing the inverter and switching it back on

1

1. Turn off the automatic circuit breaker.
2. Turn the DC disconnector to the "off" switch setting.

To start up the inverter again, follow the steps listed above in reverse order.

IMPORTANT!
Wait for the capacitors of the inverter to discharge!

IMPORTANT!
Depending on the authorization of the user, settings can be made in the individual menu areas.

1. Settings – User interface of the inverter

IMPORTANT!
Depending on the authorization of the user, settings can be made in the individual menu areas.

1. Settings – User interface of the inverter
2. User settings

IMPORTANT!
Depending on the authorization of the user, settings can be made in the individual menu areas.

1. Settings – User interface of the inverter
2. User settings

1. Settings – User interface of the inverter

All available components of the system can be added via Add component+.

PV Generator
Activate the MPP tracker and enter the connected PV output in the relevant field. In the case of combined solar module strings, PV 1 + PV 2 connected in parallel must be activated.

Primary meter
For problem-free operation with further energy generators and in Full Backup power mode, it is important to install the Fronius Smart Meter at the feed-in point. The inverter and further producers must be connected to the public grid via the Fronius Smart Meter.
This setting also has an effect on the behavior of the inverter during the night. If the function is deactivated, the inverter switches to standby mode as soon as there is no more PV power available and no energy management specification is sent to the battery (e.g., minimum state of charge reached). The message "Power low" is displayed. The inverter starts again as soon as an energy management specification is sent or sufficient PV power is available.
If the function is activated, the inverter remains permanently connected to the grid in order to draw energy from other producers at any time.
After connecting the meter, select one of the following device types:

• Modbus RTU
• Modbus TCP
• MQTT (available MQTT device is displayed automatically)

The following parameters must also be defined for the Smart Meter:

• Application (Production meter or Consumption Meter)
• Name
• Category (e.g., inverter)
• IP Address (for Modbus TCP)
• Port (for Modbus TCP)
• Modbus Address (for Modbus RTU and TCP)

The Watt value for the production meter is the sum of all production meters. The Watt value for the consumption meter is the sum of all secondary meters.

Battery
If the SoC Limit Mode is set to Auto, the values SoC Minimum and SoC Maximum are preset according to the technical specifications of the battery manufacturer.

If the SoC Limit Mode is set to Manual, the values SoC Minimum and SoC Maximum can be changed after consultation with the battery manufacturer within the framework of their technical specifications. In a backup power situation, the set values are not taken into account.

The setting Allow battery charging from other generators in the home network activates/deactivates charging of the battery from other generators.
The power consumption of the Fronius inverter can be restricted by specifying a value in the Max. Charging Power from AC field. As a maximum, a power consumption equal to the AC rated power of the Fronius inverter is possible.

The setting Allow battery charging from public grid + Allow battery charging from other generators in the home network activates/deactivates the charging of the battery from the public grid and, if present, from other generators in the home network.
The normative or compensatory specifications must be taken into account for this setting. Irrespective of this setting, necessary service-related charging from the public grid is performed (e.g., forced re-charging to protect against deep discharge).

IMPORTANT!
Fronius accepts no liability for damage to third-party batteries.

Ohmpilot
All the Ohmpilots available in the system are displayed. Select the desired Ohmpilot and add to the system via Add.

1. Settings – User interface of the inverter
2. Device configuration

All available components of the system can be added via Add component+.

PV Generator
Activate the MPP tracker and enter the connected PV output in the relevant field. In the case of combined solar module strings, PV 1 + PV 2 connected in parallel must be activated.

Primary meter
For problem-free operation with further energy generators and in Full Backup power mode, it is important to install the Fronius Smart Meter at the feed-in point. The inverter and further producers must be connected to the public grid via the Fronius Smart Meter.
This setting also has an effect on the behavior of the inverter during the night. If the function is deactivated, the inverter switches to standby mode as soon as there is no more PV power available and no energy management specification is sent to the battery (e.g., minimum state of charge reached). The message "Power low" is displayed. The inverter starts again as soon as an energy management specification is sent or sufficient PV power is available.
If the function is activated, the inverter remains permanently connected to the grid in order to draw energy from other producers at any time.
After connecting the meter, select one of the following device types:

• Modbus RTU
• Modbus TCP
• MQTT (available MQTT device is displayed automatically)

The following parameters must also be defined for the Smart Meter:

• Application (Production meter or Consumption Meter)
• Name
• Category (e.g., inverter)
• IP Address (for Modbus TCP)
• Port (for Modbus TCP)
• Modbus Address (for Modbus RTU and TCP)

The Watt value for the production meter is the sum of all production meters. The Watt value for the consumption meter is the sum of all secondary meters.

Battery
If the SoC Limit Mode is set to Auto, the values SoC Minimum and SoC Maximum are preset according to the technical specifications of the battery manufacturer.

If the SoC Limit Mode is set to Manual, the values SoC Minimum and SoC Maximum can be changed after consultation with the battery manufacturer within the framework of their technical specifications. In a backup power situation, the set values are not taken into account.

The setting Allow battery charging from other generators in the home network activates/deactivates charging of the battery from other generators.
The power consumption of the Fronius inverter can be restricted by specifying a value in the Max. Charging Power from AC field. As a maximum, a power consumption equal to the AC rated power of the Fronius inverter is possible.

The setting Allow battery charging from public grid + Allow battery charging from other generators in the home network activates/deactivates the charging of the battery from the public grid and, if present, from other generators in the home network.
The normative or compensatory specifications must be taken into account for this setting. Irrespective of this setting, necessary service-related charging from the public grid is performed (e.g., forced re-charging to protect against deep discharge).

IMPORTANT!
Fronius accepts no liability for damage to third-party batteries.

Ohmpilot
All the Ohmpilots available in the system are displayed. Select the desired Ohmpilot and add to the system via Add.

1. Settings – User interface of the inverter
2. Device configuration

Backup Power
In backup power mode, it is possible to select between Off, PV Point, and Full Backup.
The backup power mode Full Backup can only be activated once the required I/O assignments for backup power have been configured. In addition, a meter must be installed and configured at the feed-in point for the backup power mode Full Backup.

IMPORTANT!
When configuring the backup power mode PV Point, the instructions in chapter Safety on page (→) must be observed.
When configuring the backup power mode Full Backup, the instructions in chapter Safety on page (→) must be observed.

Backup Nominal Voltage
When backup power mode is activated, the nominal voltage of the public grid must be selected.

SoC warning level
In backup power mode, a warning is emitted when this residual battery capacity is reached.

Reserve Capacity
The set value results in a residual capacity (depending on the capacity of the battery) that is reserved for backup power situations. The battery is not discharged below the residual capacity in grid connected mode. In backup power mode, the manually set value of SoC Minimum is not taken into account. If there is a backup power situation, the battery is always discharged up to the automatically preset, minimum SoC according to the technical specifications of the battery manufacturer.

System preservation during night
To ensure continuous backup power operation even during the night, the inverter calculates a reserve capacity for system preservation depending on the battery capacity. When the calculated limit value is reached, standby mode is activated for the inverter and the battery and maintained for a period of 16 hours. Connected loads are no longer supplied. The battery is discharged up to the preset minimum SoC.

Load Management
Up to four pins for the load management can be selected here. Further settings for the load management are available in the Load Management menu item.
Default: Pin 1

Australia - Demand Response Modes (DRM)
The pins for control via DRM can be set here:

IMPORTANT!
If the Australia - Demand Response Modes (DRM) function is activated and no DRM control is connected, the inverter switches to standby mode.

1. Settings – User interface of the inverter
2. Device configuration

Here you can enter a value for the apparent power input and the apparent power output for the Australia country setup.

1. Settings – User interface of the inverter
2. Device configuration

Enforce Standby
When this function is activated, grid power feed operation of the inverter is interrupted. This makes it possible to shut down the inverter without power and protect its components. The standby function is automatically deactivated when the inverter is restarted.

PV 1 and PV 2

Ripple Control
Ripple control signals are signals that are sent by the energy company in order to switch controllable loads on and off. Depending on the installation situation, ripple control signals can be dampened or amplified by the inverter. This can be counteracted if necessary by applying the following settings.

Measure against RCD false triggers
(when using a 30 mA residual current circuit breaker)

Iso Warning

Backup Power

1. Settings – User interface of the inverter

In Germany, new rules for charging batteries came into force on January 1, 2024. The maximum charging power from public grids is 4.2 kW when controlled in accordance with Section 14a of the EnWG (Energy Industry Act).
The inverter must establish a connection to Fronius Solar.web for documentation purposes and be permanently connected to the Internet in order to be able to prove the implementation of the external control commands.
The charging power is limited to a value below this by default. It is important not to use more than the allowed 4.2 kW charging power.

1. Settings – User interface of the inverter
2. Energy management

In Germany, new rules for charging batteries came into force on January 1, 2024. The maximum charging power from public grids is 4.2 kW when controlled in accordance with Section 14a of the EnWG (Energy Industry Act).
The inverter must establish a connection to Fronius Solar.web for documentation purposes and be permanently connected to the Internet in order to be able to prove the implementation of the external control commands.
The charging power is limited to a value below this by default. It is important not to use more than the allowed 4.2 kW charging power.

1. Settings – User interface of the inverter
2. Energy management

Battery SoC settings
If the SoC Limit Mode is set to Auto, the values SoC Minimum and SoC Maximum are preset according to the technical specifications of the battery manufacturer.

If the SoC Limit Mode is set to Manual, the values SoC Minimum and SoC Maximum can be changed after consultation with the battery manufacturer within the framework of their technical specifications. In a backup power situation, the set values are not taken into account.

The setting Allow battery charging from other generators in the home network activates/deactivates charging of the battery from other generators.
The power consumption of the Fronius inverter can be restricted by specifying a value in the Max. Charging Power from AC field. As a maximum, a power consumption equal to the AC rated power of the Fronius inverter is possible.

The setting Allow battery charging from public grid + Allow battery charging from other generators in the home network activates/deactivates the charging of the battery from the public grid and, if present, from other generators in the home network.
The normative or compensatory specifications must be taken into account for this setting. Irrespective of this setting, necessary service-related charging from the public grid is performed (e.g., forced re-charging to protect against deep discharge).

SoC warning level
In backup power mode, a warning is emitted when this residual battery capacity is reached.

Reserve Capacity
The set value results in a residual capacity (depending on the capacity of the battery) that is reserved for backup power situations. The battery is not discharged below the residual capacity in grid connected mode.

IMPORTANT!
Fronius accepts no liability for damage to third-party batteries.

Time-dependent battery control
Using the Time-dependent battery control, it is possible to specify, restrict, or prevent the charging/discharging of the battery at/to a defined power.

• Permitted battery charging from the public grid
• Power limit of the inverter, energy storage device, or overall system
• Control specifications via Modbus
• Self-consumption optimization

IMPORTANT!
The defined regulations for battery control have the second lowest priority after Self-Consumption Optimization. Depending on the configuration, the regulations may not be fulfilled due to other settings.

• Max. charging power
  The max. charging power of the battery is the value set in the Power input field.
  If no feed into the public grid and/or direct consumption in the home is possible, the set value Max. charging power is ignored and the battery is charged with the generated energy.
• Min. charging power
  The min. charging power of the battery is the value set in the Power input field.
• Max. discharge power
  The max. discharge power of the battery is the value set in the Power input field.
• Min. discharge power
  The min. discharge power of the battery is the value set in the Power input field.