Fronius Tauro, Fronius Tauro Eco Operating instructions

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

1. Safety rules

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

1. Safety rules

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. Safety rules

• 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. Safety rules

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. Safety rules

The servicing information contained in these operating instructions is intended only for the use of qualified service engineers. 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.

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. Use only original spare parts (also applies to standard 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. Safety rules

When installing devices with ventilation slots, ensure that the ambient air can enter and exit unhindered through the vents. When selecting the installation site, observe the protection class (IP).

1. Safety rules

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. Safety rules

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. Safety rules

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

1. Safety rules

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. Safety rules

Connection of a point in the device, system or installation to earth to protect against electric shock in the event of a fault. When installing the Tauro inverter, the PE connection is mandatory as it is a protection class 1 device. When connecting the PE conductor, ensure that it is secured against accidental disconnection. All points listed under "Connecting the inverter to the public grid (AC side)" must be observed, including the use of washers, screw locks, and nuts with the defined torque.

It must be ensured that when using the strain-relief devices, the ground conductor is the last to be disconnected in the event of a possible failure. When connecting the ground conductor, the minimum cross-section requirements specified by the respective national regulations must be observed. In addition, the minimum cross-section of the PE conductor must be at least half of the phase cross-sections according to the product standard IEC 62109-1, as a cross-section of at least 35 mm² (50 kW) or 70 mm² (99.99 / 100 kW) must be used for the phases (L1 / L2 / L3).

1. Safety rules

In principle, Tauro inverters are maintenance-free. If maintenance work is nevertheless carried out on the inverter, such as cleaning or replacing components, this must be done in consultation with a Fronius-trained service technician. The manufacturer accepts no liability for damage caused by improper use.

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.
The inverter has been designed exclusively for use in grid-connected photovoltaic systems. It cannot generate electric power independently of the grid.

The inverter also has a design and functions that ensure it can offer maximum safety during installation and during operation.

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.
The inverter has been designed exclusively for use in grid-connected photovoltaic systems. It cannot generate electric power independently of the grid.

The inverter also has a design and functions that ensure it can offer maximum safety during installation and during operation.

1. General information
2. Product description

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.
The inverter has been designed exclusively for use in grid-connected photovoltaic systems. It cannot generate electric power independently of the grid.

The inverter also has a design and functions that ensure it can offer maximum safety during installation and during operation.

1. General information
2. Product description

With the "AC Daisy Chain" inverter version, the AC lead can be fed directly from the inverter to another inverter. Several Tauro inverters, up to an output power of max. 200 kW, can be thereby be quickly connected to one another.

The minimum cable cross-section is defined by the fuse at the mains connection point. A larger cable cross-section can be selected at any time. The applicable national standards must be taken into account and applied.

1. General information
2. Product description

Only applies to device types Fronius Tauro 50-3-D / Eco 50-3-D / Eco 99-3-D / Eco 100-3-D (direct):

String fuses are used in the Fronius Tauro to provide additional protection for the solar modules.
The maximum short circuit current I_sc, the maximum module return current I_R or the maximum string fuse rating specified in the module data sheet of the respective solar module is crucial in affording the solar modules the correct fuse protection.

The national regulations regarding fuse protection must be observed. The electrical engineer carrying out the installation is responsible for the correct choice of string fuses.

To replace the string fuses, see chapter Replacing the string fuses on page (→).

1. General information
2. Product description

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. Product description

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

1. General information
2. Protection of people and equipment

1. General information
2. Protection of people and equipment

There are warning notices and safety symbols on the inside and outside of the inverter. These warning notices and safety symbols must not be removed or painted over. They warn against incorrect operation, as this may result in serious injury and property damage.

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:
	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.
	Wait until the capacitors have discharged before opening the device.

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 isolated.

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 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

		The surge protection device (SPD) protects against temporary overvoltages and dissipates surge currents (e.g., lightning strike). Building on an overall lightning protection concept, the SPD helps to protect your PV system components.
		If the surge protection device is triggered, the color of the indicator changes from green to red (mechanical display). A tripped SPD must be replaced immediately by an authorized specialist company with a functioning SPD in order to maintain the full protective function of the unit.
		There is the option of a digital indication when an SPD has tripped. For setting this function, see PDF "Temporary SPD Triggering" in the Service & Support area at www.fronius.com

IMPORTANT!
After setting the function described above, the inverter will also respond if the 2-pole signal cable of the surge protection device is interrupted or damaged.

1. General information
2. Protection of people and equipment

Available ex works.

AFCI (Arc Fault Circuit Interrupter) protects against arcing faults and in the narrower sense is a protection device against contact faults. The AFCI evaluates any faults that occur in the current and voltage curve with an electronic circuit and switches off the circuit when a contact fault is detected. This prevents overheating on poor contacts and possible fires.

IMPORTANT!
Active solar module electronics can interfere with the function of the ArcGuard. Fronius does not guarantee the correct functioning when using Fronius ArcGuard in combination with active solar module electronics.

IMPORTANT!
Fronius will not accept any costs associated with production downtimes, installer costs, etc., that may arise as the result of a detected arc and its consequences. Fronius accepts no liability for damage that can occur despite the presence of the integrated Arc Fault Circuit Interrupter/extinguishing system (e.g., caused by a parallel arc).

Automatic reconnection
To restart the AFCI, no manual procedure is required if a minimum interruption time of 5 minutes is ensured before continuing operation.
When interrupting for the fifth time within a 24 h period, the AFCI is only allowed to be reset manually before the AFCI does reconnect. Afterwards, the AFCI may return to automatic reconnection mode.

1. General information
2. Protection of people and equipment

If one of the following safety devices trips, the inverter will change to a safe state:

• WSD
• isolation measurement
• RCMU and
• AFCI

In the safe state, the inverter no longer feeds into the grid and is disconnected from the grid by opening the AC relays.

1. General information

The inverter is designed exclusively to convert direct current from PV modules into alternating current and feed this power into the public grid.

Intended use also includes following all information from the operating instructions.

1. General information
2. Utilization in accordance with "intended purpose"

The inverter is designed exclusively to convert direct current from PV modules into alternating current and feed this power into the public grid.

Intended use also includes following all information from the operating instructions.

1. General information
2. Utilization in accordance with "intended purpose"

• Any use that is not the intended use or goes beyond the intended use.
• Alternations to the inverter are not expressly recommended by Fronius.
• Installation of components that are not expressly recommended or sold by Fronius.

The manufacturer shall not be liable for any resulting damage. In addition, no warranty claims will be entertained.

1. General information
2. Utilization in accordance with "intended purpose"

The inverter is designed exclusively to be connected and used with PV modules.
Use with other DC generators (e.g., wind generators) is not permitted.

When configuring the photovoltaic system, make sure that all photovoltaic system components are operating exclusively within their permitted operating range.

All measures recommended by the PV module manufacturer for maintaining the PV module properties must be followed.

1. General information

The inverter is fully automatic. Starting at sunrise, as soon as the PV modules are generating enough energy, the inverter starts checking the PV system (insulation measurement) and the grid (mains voltage and mains frequency). If all values are within the normative framework, the system is automatically connected to the grid and grid power feed operation begins.

The control system of the inverter ensures that the maximum possible power output is drawn from the PV modules at all times. This function is called MPPT (Maximum Power Point Tracking). In the event of shady conditions affecting the PV modules, a large part of the local maximum power point (LMPP) of the PV system can still be obtained via the "Dynamic Peak Manager" function.

As dusk starts and there is no longer sufficient energy available to feed energy into the grid, the inverter shuts down the connection of the power electronics to the grid completely and stops operating. All settings and recorded data are saved.

1. General information
2. Functional principle

The inverter is fully automatic. Starting at sunrise, as soon as the PV modules are generating enough energy, the inverter starts checking the PV system (insulation measurement) and the grid (mains voltage and mains frequency). If all values are within the normative framework, the system is automatically connected to the grid and grid power feed operation begins.

The control system of the inverter ensures that the maximum possible power output is drawn from the PV modules at all times. This function is called MPPT (Maximum Power Point Tracking). In the event of shady conditions affecting the PV modules, a large part of the local maximum power point (LMPP) of the PV system can still be obtained via the "Dynamic Peak Manager" function.

As dusk starts and there is no longer sufficient energy available to feed energy into the grid, the inverter shuts down the connection of the power electronics to the grid completely and stops operating. All settings and recorded data are saved.

1. General information
2. Functional principle

Cooling of the inverter is performed by a forced-air ventilation system via temperature-controlled fans. Air is sucked in from the front and fed, via a sealed duct, through the AC and DC heat sink, before passing directly over the inductors and dissipating.
The sealed air duct prevents the electronics compartment from coming into contact with the ambient air. This approach largely prevents any contamination of the electronics compartment.
The fan speed and temperature of the inverter are monitored.

The variable-speed, ball-bearing mounted fans in the inverter permit the following:

• Optimum cooling of the inverter
• Cooler components, therefore a longer service life
• Lowest-possible energy consumption
• High output power including in top temperature range of the inverter

1. General information
2. Functional principle

When the device temperature gets too high, the inverter automatically reduces the current output power in order to protect itself. Reasons for an excessively high device temperature can be a high ambient temperature or insufficient heat dissipation (for example, when installed in containers without sufficient heat dissipation).

The output of the inverter is reduced such that the temperature will not exceed the permissible limit.
If a maximum temperature is exceeded, the inverter switches off in a safe state and resumes grid power feed operation only after the device has cooled down.

1. General information

(1)	DC disconnector Disconnects the electrical connection from the solar modules to the inverter. Depending on the device type, 2 or 3 DC disconnectors are installed. The DC disconnectors can be secured against switching on with a padlock.
(2)	AC disconnector option The optional AC disconnector breaks the connection from the inverter to the grid
(3)	Button function For further information about the button function, see Button functions and LED status indicator
(4)	LED status indicator For further information about the LED status indicator, see Button functions and LED status indicator

1. General information
2. Operating controls and connections

(1)	DC disconnector Disconnects the electrical connection from the solar modules to the inverter. Depending on the device type, 2 or 3 DC disconnectors are installed. The DC disconnectors can be secured against switching on with a padlock.
(2)	AC disconnector option The optional AC disconnector breaks the connection from the inverter to the grid
(3)	Button function For further information about the button function, see Button functions and LED status indicator
(4)	LED status indicator For further information about the LED status indicator, see Button functions and LED status indicator

1. General information
2. Operating controls and connections

1. General information
2. Operating controls and connections

1. General information
2. Operating controls and connections

1. General information
2. Operating controls and connections

1. General information
2. Operating controls and connections

1. General information
2. Operating controls and connections

1. General information
2. Operating controls and connections

The currents of the individual strings are visible in Solar.web under History - Devices - Channels.

1. General information
2. Operating controls and connections

Tauro Eco 50-3-P / 99-3-P / 100-3-P		Tauro 50-3-P

1. General information
2. Operating controls and connections

Above the DC connection area there is space for mounting third-party components. Components up to a maximum width of 14.5 cm (8 DU) can be mounted on the DIN rail. The components must have a temperature resistance of ‑40 °C to +85 °C.

1. General information
2. Operating controls and connections

The data communication area (Pilot PC board) is located above the DC connections in the inverter.

1. General information
2. Operating controls and connections

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.

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.web live 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.web live 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 starting.    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 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 inverter is performing an update.    /    Flash blue
		There is a service message.    Lights up white

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 and Startup

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 and Startup
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 and Startup

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

Only install on a solid, non-flammable surface

Max. ambient temperatures: -40 °C / +65 °C
* with built-in optional AC disconnector: -35 °C / +65 °C

Relative humidity: 0 - 100%

When installing the inverter in a switch cabinet or similar closed environment, ensure adequate heat dissipation by forced-air ventilation.

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.

• Walls (corrugated metal walls [mounting rails], brick walls, concrete walls or other non-flammable surfaces sufficiently capable of bearing loads)
• Poles (installed using mounting rails, behind the PV modules directly on the PV mounting system)
• Flat roofs (if this is for a foil roof, make sure that the foils 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 DC disconnectors must always be freely accessible after installation of the inverter.

		The inverter is suitable for indoor installation.
		The inverter is suitable for outdoor installation. Because of its IP 65 protection class, the inverter is not susceptible to hose water on any side and can also be operated in moist environments.
		The inverter is suitable for outdoor installation. In order to keep inverter heating as low as possible, it is recommended that the inverter is not exposed to direct sunlight. The inverter should be installed in a protected location, for example, near the solar modules or under an overhanging roof.
		IMPORTANT! 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 (for example, fertilizer storage areas, vent openings for livestock stables, chemical plants, tanneries, etc.)
		During certain operating phases the inverter may produce a 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 (horses, cattle, sheep, pigs, etc.) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, fertilizers, etc. Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds
		The inverter is designed to be dust-proof (IP 65). However, in areas of high dust accumulation, the cooling surfaces can become dusty, which can impair the thermal performance. In this case, the dust must be removed regularly. We therefore recommend not installing the inverter in areas and environments with high dust accumulation.

1. Installation and Startup
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: -40 °C / +65 °C
* with built-in optional AC disconnector: -35 °C / +65 °C

Relative humidity: 0 - 100%

When installing the inverter in a switch cabinet or similar closed environment, ensure adequate heat dissipation by forced-air ventilation.

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.

• Walls (corrugated metal walls [mounting rails], brick walls, concrete walls or other non-flammable surfaces sufficiently capable of bearing loads)
• Poles (installed using mounting rails, behind the PV modules directly on the PV mounting system)
• Flat roofs (if this is for a foil roof, make sure that the foils 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 DC disconnectors must always be freely accessible after installation of the inverter.

		The inverter is suitable for indoor installation.
		The inverter is suitable for outdoor installation. Because of its IP 65 protection class, the inverter is not susceptible to hose water on any side and can also be operated in moist environments.
		The inverter is suitable for outdoor installation. In order to keep inverter heating as low as possible, it is recommended that the inverter is not exposed to direct sunlight. The inverter should be installed in a protected location, for example, near the solar modules or under an overhanging roof.
		IMPORTANT! 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 (for example, fertilizer storage areas, vent openings for livestock stables, chemical plants, tanneries, etc.)
		During certain operating phases the inverter may produce a 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 (horses, cattle, sheep, pigs, etc.) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, fertilizers, etc. Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds
		The inverter is designed to be dust-proof (IP 65). However, in areas of high dust accumulation, the cooling surfaces can become dusty, which can impair the thermal performance. In this case, the dust must be removed regularly. We therefore recommend not installing the inverter in areas and environments with high dust accumulation.

1. Installation and Startup
2. Installation location and position

		The inverter is designed to be installed vertically on a vertical wall. The optional floor racks must not be used for vertical mounting.
		The inverter should have a minimum inclination of 3° in a horizontal installation position so that water can run off. Mounting of the optional floor racks is recommended. The floor racks may only be used on an installation position of 0 - 45°.
		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 and Startup

WARNING!

Danger of serious injury and damage from articles being dropped or falling over.

When transporting by crane:

Hook chains and ropes onto the suspension points only

Always hook chains and ropes onto both suspension points

1. Installation and Startup
2. Transport

WARNING!

Danger of serious injury and damage from articles being dropped or falling over.

When transporting by crane:

Hook chains and ropes onto the suspension points only

Always hook chains and ropes onto both suspension points

1. Installation and Startup
2. Transport

1. Installation and Startup

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 and Startup
2. Installing 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 and Startup
2. Installing the inverter

Dimensions of the mounting bracket—all dimensions in mm.

1. Installation and Startup
2. Installing the inverter

1.

Observe the local regulations for lifting heavy loads or use a crane to lift the device (attach to crane-hoisting lugs)

2.

To attach the inverter to the mounting bracket, use only the screws included in the scope of delivery.

1

2

3

4

Observe the local regulations for lifting heavy loads or use a crane to lift the device (attach to crane-hoisting lugs)

5

To attach the inverter to the mounting bracket, use only the screws included in the scope of delivery.

1. Installation and Startup
2. Installing the inverter

1

The floor racks can be ordered as an optional accessory.

Mounting the inverter on a horizontal mounting surface is not mandatory, but recommended.
Depending on the surface, different wall plugs and screws are required for floor mounting the floor racks. Wall plugs and screws are therefore not included in the scope of supply of the inverter. The installer is responsible for selecting the correct wall plugs and screws.

2Mount the inverter and floor racks securely to a suitable surface using the appropriate installation materials

Do not climb onto the device!

1. Installation and Startup

IMPORTANT! To provide the best possible grid monitoring, the resistance in the leads to the mains connections should be as low as possible.

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

IMPORTANT! To provide the best possible grid monitoring, the resistance in the leads to the mains connections should be as low as possible.

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

IMPORTANT! Only the following cables may be connected to V-type terminals:

• RE (solid round conductor)
• RM (stranded round conductor)
• SE (solid sector conductor)
• SM (stranded sector conductor)
• Fine-core cables only in conjunction with ferrules

Fine-core cables without ferrules may only be connected to the M12 threaded bolts of the grid connections using a suitable M12 cable lug;
torque = 32 Nm

Cable gland "Multicore" version

The following cable outer diameters are compatible with the larger bushing:
16 - 27.8 - 36.2 - 44.6 - 53 - 61.4 mm

For the small bushing (M32 PG gland), earth cables of 10 - 25 mm can be fed through.

Cable gland "Singlecore" version

5 M40 bushings

Cable gland "AC Daisy Chain" version

10 M32 bushings

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

Aluminum cables can also be connected to the AC connections.

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

The temperature resistance of the AC cables must be at least 90 °C.

If cables are used that do not withstand this temperature requirement, fit the protective hose (item number: 4.251.050) over the phases (L1 / L2 / L3) and neutral conductor (N)! The grounding PE does not need to be protected with a protective hose.
With the AC daisy chain option, all phases and neutral conductors must be protected with the protective hose. This means that the AC daisy chain option requires two protective hose sets.

AC connections
Select a sufficiently large cable cross-section based on the power category and connection variant!

* The cable cross-section of the neutral conductor can be reduced to 25 mm² if no local guidelines or standards require otherwise.

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

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

The clamping range of the V-type terminal is 35 - 150 mm² when delivered. The clamping range can be changed to 185 - 240 mm² by a simple modification of the V-type terminal.

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

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

An optional hole can be made on the right side of the housing at the bottom for an additional PE introduction.

1

2

Insert the screw connection in the hole and secure to the torque specified by the manufacturer.

The opening must be sealed in accordance with the protection class of the inverter!

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

IMPORTANT! For the PE connection, the requirements defined under "Safety rules" for safe connection of the PE conductor must also be observed.

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

1

2

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

1

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

Ensure that the phases are connected in the right order: PE, N, L1, L2 and L3.

1

2

3

4

5

6

7

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

Ensure that the phases are connected in the right order: PE, PEN, L1, L2 and L3.

1

2

3

4

NOTE!

The PEN conductor must be produced with ends that are permanently marked blue, according to the national provisions.

5

6

7

8

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

When connecting, ensure that the phases are in the correct order: PE, N, L1, L2 and L3.

1

2

3

4

5

6

Secure to the torque specified by the manufacturer of the strain-relief device. The strain-relief device is not part of the scope of supply.

7

Secure to the torque specified by the manufacturer

8

9

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

Ensure that the phases are connected in the right order: PE, N, L1, L2 and L3.

1

2

3

4

5

6

7

8

9

10

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

Alternatively, a cable with a cable lug can be connected to the M12 threaded bolts on the grid connections in order to connect the cables to the V-type terminals.

1. Installation and Startup

1. Installation and Startup
2. Connecting the PV cable to the inverter

1. Installation and Startup
2. Connecting the PV cable 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 and Startup
2. Connecting the PV cable to the inverter

DC connections
Select a sufficiently large cable cross-section based on the device type! The temperature resistance of the DC cables must be at least 90 °C.

1. Installation and Startup
2. Connecting the PV cable to the inverter

1. Installation and Startup
2. Connecting the PV cable to the inverter

* DC fuse optional depending on national standard / DC breaker optional / DC SPD optional

1. Installation and Startup
2. Connecting the PV cable to the inverter

* DC fuse optional depending on national standard / DC breaker optional / DC SPD optional

1. Installation and Startup
2. Connecting the PV cable to the inverter

Distribute the existing solar module strings evenly between the PV inputs (PV1 / PV2 / PV3) of the inverter.
Start with the odd inputs first and then fill the even inputs to distribute the power as evenly as possible and increase the service life of the fuses, for example: (1.1, 2.1, 3.1, 1.3, 2.3etc.).

1. Installation and Startup
2. Connecting the PV cable to the inverter

1

Connect the PV cables from the solar modules to the MC4 connectors as labeled

Unused MC4 connectors on the inverter must be covered with the cover plates supplied with the inverter.

1. Installation and Startup
2. Connecting the PV cable to the inverter

To protect the MC4 connectors, a cover plate can be mounted on the inverter. The cover plate can be ordered as an optional accessory together with the floor racks.

1. Installation and Startup
2. Connecting the PV cable to the inverter

Solar module strings that are combined in a DC combiner box, must, according to the applicable national regulations, be fused per string in the DC combiner box!

Before working in the connection area of the inverter, the DC voltage must be switched off. This can also be done in the DC combiner box.

1

2

3

4

5

6

7

8

1. Installation and Startup
2. Connecting the PV cable to the inverter

Alternatively, a cable with a cable lug can be connected to the M12 threaded bolts on the grid connections in order to connect the cables to the V-type terminals.

1. Installation and Startup
2. Connecting the PV cable to the inverter

Replacing fuses:
Fronius Tauro 50-3-D string 1.1 - 3.7 /
Fronius Tauro 50-3-D (30 A fuses) string 1.1 - 3.5 /
Fronius Tauro Eco 50-3-D string 1.1 - 2.7 /
Tauro Eco 50-3-D (30 A fuses) string 1.1 - 2.5 /
Fronius Tauro Eco 99 / 100-3-D string 1.1 - 2.7 /
Fronius Tauro Eco 99 / 100-3-D (30 A fuses) string 1.1 - 3.5
Check values! Only replace faulty fuses with new ones of the same rating.

1

Replacing fuses:
Fronius Tauro Eco 99 / 100-3-D string 3.1 - 3.8
Check values! Only replace faulty fuses with new ones of the same rating.

1

2

3

4

5

1. Installation and Startup
2. Connecting the PV cable to the inverter

1

2

3

4

WARNING!

Danger due to DC disconnectors that are not switched on properly

This can result in serious injury and damage to property.

Turn all existing DC disconnectors to the ON position before turning on the AC connection.

The DC disconnectors may only ever be actuated simultaneously (one immediately after the other).

5

The WLAN access point can be opened with the optical sensor, see chapter Button functions and LED status indicator on page (→)

6

1. Installation and Startup

The inputs M0 and M1 can be freely selected. A maximum of 4 Modbus participants can be connected to the Modbus terminal on inputs M0 and M1.

IMPORTANT!
If the function “Inverter control via Modbus” is activated in the menu area “Communication” → “Modbus”, no Modbus participants are possible. It is not possible to send and receive data at the same time.

1. Installation and Startup
2. Connecting the data communication cables

The inputs M0 and M1 can be freely selected. A maximum of 4 Modbus participants can be connected to the Modbus terminal on inputs M0 and M1.

IMPORTANT!
If the function “Inverter control via Modbus” is activated in the menu area “Communication” → “Modbus”, no Modbus participants are possible. It is not possible to send and receive data at the same time.

1. Installation and Startup
2. Connecting the data communication cables

Cables with the following design can be connected to the terminals of the inverter:

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

1. Installation and Startup
2. Connecting the data communication cables

The network cabling of the inverters must be in a star arrangement. Observe the maximum lengths and requirements for the cable!

1. Installation and Startup
2. Connecting the data communication cables

To use the connection to Fronius Solar.web or Modbus TCP, each Tauro must be connected directly to the network via LAN.

IMPORTANT! If data communication cables are wired into the inverter, observe the following points:

• 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.

Note! Should the blanking plugs be missing or improperly fitted, then protection class IP65 cannot be guaranteed.

1

Undo the strain-relief device cap 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 strain-relief device cap nut and then through the housing opening.

4

Insert the sealing ring between the cap 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 strain-relief device.

5

Connect the data cables to the data communication area using a movement loop, and fasten the cap nut with min. 2.5 to max. 4 Nm.

1. Installation and Startup
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 and Startup

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 and Startup
2. First startup

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 and Startup
2. First startup

To simplify the display, the vertical installation position of the Pilot PC board (LED display) is shown horizontally below.

1. Installation and Startup
2. First startup

The "Fronius Solar.start" app is required for this installation method. Depending on the end device with which the installation will be carried out, download the app for the respective platform.

1Download and install the Fronius Solar.start app.

2Open the access point by touching the sensor    → Communication LED flashes blue.

3Open the 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 Solar.web and start up the PV system.

The network wizard and the product setup can be carried out independently of each other. A network connection is required for the Solar.web installation wizard.

1. Installation and Startup
2. First startup

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 and Startup

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 and Startup
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

Select "Add component+" to add all available components to the system.

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

Select "Add component+" to add all available components to the system.

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

Lastmanagement
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

OFF—Demand Response Mode (DRM)
The pins for control via DRM can be set here:

IMPORTANT!
If the Demand Response Mode (DRM) function is activated and no DRM control is connected, the inverter switches into standby mode.

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

Here, for the Australian country setup, a value for the apparent power consumption and the apparent power output can be entered.

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

"Force standby"
When this function is activated, the supply of energy from the inverter into the grid 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 signal"
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)

"Insulation warning"

1. Settings – User interface of the inverter

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

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

All available updates are provided on the product page and in the "Fronius Download Search" area at www.fronius.com .

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

The guided setup wizard can be accessed here.

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

All settings
Resets all configuration data, apart from the country setup. Changes to the country setup may only be made by authorized personnel.

All settings without network
Resets all configuration data, apart from the country setup and the network settings. Changes to the country setup may only be made by authorized personnel.

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

Current messagesAll current events of the linked system components are displayed here.

IMPORTANT!
Depending on the type of event, this must be confirmed via the "tick" button so that it can be further processed.

History
All events of the linked system components that are no longer present are displayed here.

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

All the information regarding the system and the current settings is displayed and provided for download in this menu area.

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

The power data and functional scope of the inverter are stored in the license file. If the inverter, power stage set, or data communication area is replaced, the license file must also be replaced.

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

IMPORTANT!
The support user exclusively enables Fronius Technical Support to configure settings on the inverter via a secure connection. Access is deactivated by clicking the Terminate Support User Session button.

IMPORTANT!
The remote access exclusively enables Fronius Technical Support to access the inverter via a secure connection. In this case, diagnostics data are transmitted, which are used for troubleshooting. The remote access can be activated only upon request by Fronius Support.

1. Settings – User interface of the inverter

Server addresses for data transfer
If a firewall is used for outgoing connections, the below protocols, server addresses, and ports must be allowed for successful data transfer, see:
https://www.fronius.com/~/downloads/Solar%20Energy/firmware/SE_FW_Changelog_Firewall_Rules_EN.pdf

When using FRITZ!Box products, Internet access must be configured without any restrictions or limitations. The DHCP Lease Time (validity) must not be set to 0 (=infinite).

LAN:

After connecting, the status of the connection should be checked (refer to the chapter headed Internet services on page (→)).

WLAN:

Establishing a connection via WPS:

☐

The access point of the inverter must be active. This is opened by touching the sensor    > Communications LED flashes blue

1.

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

2.

Enter 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.

3.

Enter the IP address 192.168.250.181 in the address bar of the browser and confirm.

4.

In the Communication > Network > WLAN > WPS menu area, click the Activate button.

5.

Activate WPS on the WLAN router (see WLAN router documentation).

6.

Click on the Start button. The connection is established automatically.

7.

Log in to the user interface of the inverter.

8.

Check the network details and connection to Fronius Solar.web.

1Establish the connection to the inverter in the network settings (the inverter is displayed with the name "FRONIUS_" and the serial number of the device).

2Enter 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.

3Enter the IP address 192.168.250.181 in the address bar of the browser and confirm.

4In the Communication > Network > WLAN > WPS menu area, click the Activate button.

5Activate WPS on the WLAN router (see WLAN router documentation).

6Click on the Start button. The connection is established automatically.

7Log in to the user interface of the inverter.

8Check the network details and connection to Fronius Solar.web.

After connecting, the status of the connection should be checked (refer to the chapter headed Internet services on page (→)).

Selecting and connecting to a WLAN network:
The networks found are displayed in the list. Clicking on the Refresh button will    perform a new search for available WLAN networks. The selection list can be limited further via the Search network input field.

1Select network from the list.

2Select the connection type: Automatic or Static.

3For the Automatic connection type, enter the WLAN password and host name.

4For the Static connection type, enter the IP address, subnet mask, DNS, and gateway.

5Click the Connect button.

✓The connection is established.

After connecting, the status of the connection should be checked (refer to the chapter headed Internet services on page (→)).

Access point:

The inverter serves as the access point. A PC or smart device connects directly to the inverter. Connecting to the Internet is not possible. In this menu area, Network Name (SSID) and Network Key (PSK) can be assigned.
It is possible to operate a connection via WLAN and via the access point at the same time.

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

Server addresses for data transfer
If a firewall is used for outgoing connections, the below protocols, server addresses, and ports must be allowed for successful data transfer, see:
https://www.fronius.com/~/downloads/Solar%20Energy/firmware/SE_FW_Changelog_Firewall_Rules_EN.pdf

When using FRITZ!Box products, Internet access must be configured without any restrictions or limitations. The DHCP Lease Time (validity) must not be set to 0 (=infinite).

LAN:

After connecting, the status of the connection should be checked (refer to the chapter headed Internet services on page (→)).

WLAN:

Establishing a connection via WPS:

☐

The access point of the inverter must be active. This is opened by touching the sensor    > Communications LED flashes blue

1.

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

2.

Enter 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.

3.

Enter the IP address 192.168.250.181 in the address bar of the browser and confirm.

4.

In the Communication > Network > WLAN > WPS menu area, click the Activate button.

5.

Activate WPS on the WLAN router (see WLAN router documentation).

6.

Click on the Start button. The connection is established automatically.

7.

Log in to the user interface of the inverter.

8.

Check the network details and connection to Fronius Solar.web.

1Establish the connection to the inverter in the network settings (the inverter is displayed with the name "FRONIUS_" and the serial number of the device).

2Enter 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.

3Enter the IP address 192.168.250.181 in the address bar of the browser and confirm.

4In the Communication > Network > WLAN > WPS menu area, click the Activate button.

5Activate WPS on the WLAN router (see WLAN router documentation).

6Click on the Start button. The connection is established automatically.

7Log in to the user interface of the inverter.

8Check the network details and connection to Fronius Solar.web.

After connecting, the status of the connection should be checked (refer to the chapter headed Internet services on page (→)).

Selecting and connecting to a WLAN network:
The networks found are displayed in the list. Clicking on the Refresh button will    perform a new search for available WLAN networks. The selection list can be limited further via the Search network input field.

1Select network from the list.

2Select the connection type: Automatic or Static.

3For the Automatic connection type, enter the WLAN password and host name.

4For the Static connection type, enter the IP address, subnet mask, DNS, and gateway.

5Click the Connect button.

✓The connection is established.

After connecting, the status of the connection should be checked (refer to the chapter headed Internet services on page (→)).

Access point:

The inverter serves as the access point. A PC or smart device connects directly to the inverter. Connecting to the Internet is not possible. In this menu area, Network Name (SSID) and Network Key (PSK) can be assigned.
It is possible to operate a connection via WLAN and via the access point at the same time.

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

To use the Modbus TCP or the connection to Fronius Solar.web, each Tauro must be connected directly to the network via LAN.

Modbus RTU interface 0 / 1
If one of the two Modbus RTU interfaces is set to Slave, the following input fields are available:

Slave as Modbus TCP
This setting is necessary to enable inverter control via Modbus. If the function Slave as Modbus TCP is activated, the following input fields are available:

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

The utility/energy supplier can influence the output power of the inverter with Cloud control. This requires the inverter to have an active Internet connection.

* Cloud control
A virtual power plant is an interconnection of multiple generators. This virtual power plant can be controlled by means of the cloud control via the Internet. An active inverter Internet connection is a prerequisite for this. System data are transferred.

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

The Solar API is an IP-based, open JSON interface. If enabled, IOT devices in the local network may access inverter information without authentication. For security reasons, the interface is disabled by default and must be enabled if it is required for a third-party application (e.g., EV charger, smart home solutions, etc.) or the Fronius Wattpilot.

For monitoring, Fronius recommends using Fronius Solar.web, which provides secure access to inverter status and production information.

In the event of a firmware update to version 1.14.x, the Solar API setting is applied. In systems with a version below 1.14.x, the Solar API is activated; with higher versions, it is deactivated but can be switched on and off via the menu.

Activating the Fronius Solar API
On the user interface of the inverter in the Communication > Solar API menu area, activate the function Activate communication via Solar API.

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

In this menu, you can agree to the technically necessary data processing or reject it.

In addition, the transfer of analysis data and remote access via Solar.web can be enabled or disabled.

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

Information regarding connections and the current connection status is displayed in this menu. If there are problems with the connection, a short description of the error is displayed.

1. Settings – User interface of the inverter

The Country Setup menu area is intended exclusively for installers/service technicians from authorized specialist companies. To apply for the access code required for this menu area, see chapter Requesting inverter codes in Solar.SOS.

The selected country setup for the country in question contains preset parameters in accordance with nationally applicable standards and requirements. Changes may need to be made to the selected country setup depending on local grid conditions and the specifications of the utility.

1. Settings – User interface of the inverter
2. Safety and grid requirements

The Country Setup menu area is intended exclusively for installers/service technicians from authorized specialist companies. To apply for the access code required for this menu area, see chapter Requesting inverter codes in Solar.SOS.

The selected country setup for the country in question contains preset parameters in accordance with nationally applicable standards and requirements. Changes may need to be made to the selected country setup depending on local grid conditions and the specifications of the utility.

1. Settings – User interface of the inverter
2. Safety and grid requirements

The Country Setup menu area is intended exclusively for installers/service technicians from authorized specialist companies. The inverter access code required for this menu area can be requested in the Fronius Solar.SOS portal.

Requesting inverter codes in Fronius Solar.SOS:

1.

Open solar-sos.fronius.com in the browser

2.

Log in with your Fronius account

3.

At the top right, click on the drop-down menu   

4.

Select the Show inverter codes menu item

5.

A contract page appears on which the request for the access code to change the grid parameters for Fronius inverters is located

6.

Accept the terms and conditions of use by checking Yes, I have read and agree to the terms of use and click Confirm & Save

7.

After that, the codes can be retrieved in the drop-down menu at the top right under Show inverter codes

1Open solar-sos.fronius.com in the browser

2Log in with your Fronius account

3At the top right, click on the drop-down menu   

4Select the Show inverter codes menu item

✓A contract page appears on which the request for the access code to change the grid parameters for Fronius inverters is located

5Accept the terms and conditions of use by checking Yes, I have read and agree to the terms of use and click Confirm & Save

6After that, the codes can be retrieved in the drop-down menu at the top right under Show inverter codes

1. Settings – User interface of the inverter
2. Safety and grid requirements

Due to hardware restrictions, the Fronius Tauro cannot reduce the power to 0%, but only to 0.5 to 1%.

Electricity retailers or grid operators can prescribe feed-in limits for an inverter (e.g., max. 70% of the kWp or max. 5 kW).
The feed-in limitation takes into account the self-consumption in the household before the power of an inverter is reduced:

1. Simple power reduction of an inverter using Fronius Smart Meter
2. Power reduction by external plant controller

The following formulas provide guidance as to which solution may apply:
P_WRn ... Inverter power n

0% P_WR1 + 100% P_WR2 + 100% P_WR3... ≤ Feed-in limit → Solution a)

0% P_WR1 + 100% P_WR2 + 100% P_WR3... > Feed-in limit → Solution b)

Solution a) - Power reduction of a single inverter.
The specifications can be met if the prescribed feed-in limit is achieved by reducing the power of a single inverter to ≥ 0%.

Example:
there are 3 inverters in a system: 1x Fronius Tauro 100 kW, 2x Fronius Tauro 50 kW. The specified feed-in limit at the transfer point must not exceed 100 kW.

Solution:
the Fronius Tauro can be regulated to 0% output power to meet the feed-in limit. The outputs of the other two inverters are not reduced and can feed in at any time without restriction.

If the power reduction of an inverter to 0% is not sufficient, solution b) must be applied.

Solution b) - Integration of a plant controller.
This solution is used if the specifications of the grid operator cannot be met by limiting a single inverter, or if permanent access (e.g., remote shutdown) is required. In this case, the integration of a PLANT CONTROLLER is recommended.

A detailed technical overview of this solution can be found at www.fronius.com under the keyword "feed-in management".

To benefit from the advantages of Fronius Solar.web, in addition to the monitoring function of the PLANT CONTROLLER SYSTEM a Fronius Smart Meter can also be installed. The integration of a Fronius Smart Meter ensures that the load and feed-in data of the PV system are visualized in Fronius Solar.web and are available for analysis.

1. Settings – User interface of the inverter
2. Safety and grid requirements

General
Settings relevant to a grid operator are made under this menu item. An effective power limit in % and/or a power factor limit can be set.

IMPORTANT!
To view and change settings in this menu item, select the user Technician, and enter and confirm the password for the user Technician. Settings in this menu area may only be made by trained and qualified personnel.

Input pattern (assignment of individual I/Os)
1 click = white (contact open)
2 clicks = blue (contact closed)
3 clicks = gray (not used)

• Capacitive
• Inductive

DNO feedback
If the rule is activated, the DNO feedback output (pin 1 recommended) must be configured (e.g., for operating a signal device).

The data format *.fpc is supported for Import and Export.

Controlling Priorities
Used to set controlling priorities for I/O power management (DRM or ripple control receiver), the export limitation, and control via Modbus.

1 = highest priority, 3 = lowest priority

Local priorities of the I/O power management, the export limitation, and the Modbus are overridden by cloud control commands (regulatory purposes and virtual power plants) – see Cloud control on page (→) and by backup power.

The controlling priorities are differentiated internally by power control and inverter shutdown. Inverter shutdown always takes precedence over power control. An inverter shutdown command is always executed, regardless of the priority.

• I/O Powerlimit (DRM/ripple control receiver signal) – according to command
• Export Limitation (Soft Limit) – always active
• Modbus (generation limit) – according to command

• I/O Powerlimit with export limitation = 0% (DRM/ripple control receiver signal) – according to command
• Export Limitation (Hard Limit)
• Modbus (shutdown command) – according to command

1. Settings – User interface of the inverter
2. Safety and grid requirements

The ripple control signal receivers and the I/O terminals of the inverter can be connected to one another as shown in the connection diagram.
For distances of over 10 m between the inverter and the ripple control signal receiver, a CAT 5 STP cable is recommended as a minimum and the shielding must be connected on one side at the push-in terminal of the data communication area (SHIELD).

1. Settings – User interface of the inverter
2. Safety and grid requirements

1. Settings – User interface of the inverter
2. Safety and grid requirements

The ripple control signal receivers and the I/O terminals of the inverter can be connected to one another as shown in the connection diagram.
For distances of over 10 m between the inverter and the ripple control signal receiver, a CAT 5 STP cable is recommended as a minimum and the shielding must be connected on one side at the push-in terminal of the data communication area (SHIELD).

1. Settings – User interface of the inverter
2. Safety and grid requirements

1. Settings – User interface of the inverter
2. Safety and grid requirements

The ripple control signal receivers and the I/O terminals of the inverter can be connected to one another as shown in the connection diagram.
For distances of over 10 m between the inverter and the ripple control signal receiver, a CAT 5 STP cable is recommended as a minimum and the shielding must be connected on one side at the push-in terminal of the data communication area (SHIELD).

1. Settings – User interface of the inverter
2. Safety and grid requirements

1. Settings – User interface of the inverter
2. Safety and grid requirements

The ripple control signal receivers and the I/O terminals of the inverter can be connected to one another as shown in the connection diagram.
For distances of over 10 m between the inverter and the ripple control signal receiver, a CAT 5 STP cable is recommended as a minimum and the shielding must be connected on one side at the push-in terminal of the data communication area (SHIELD).

1. Settings – User interface of the inverter
2. Safety and grid requirements

1. Settings – User interface of the inverter
2. Safety and grid requirements

The grid operator may request the connection of one or more inverters to a ripple control receiver in order to limit the effective power and/or the power factor of the photovoltaic system.

Connection diagram for ripple control receiver with several inverters

The following Fronius inverters can be connected to the ripple control receiver via a distributor (coupling relay):

• Symo GEN24
• Primo GEN24
• Tauro
• SnapINverter (only devices with Fronius Datamanager 2.0)

IMPORTANT!
On the user interface of each inverter connected to the ripple control receiver, the 4-relay mode setting (see Connection diagram - 4 relays and I/O power management settings - 4 relays) must be activated.

1. Appendix

1. Appendix
2. Status codes and remedy

1173 – ArcContinuousFault (operating LED: flashes red)

Cause:	An electric arc has been identified on the PV system, and the maximum number of automatic connections within 24 hours has been reached.
Remedy:	Keep the sensor pressed on the inverter for 3 seconds  (max. 6 seconds).
OR:	On the user interface of the inverter, in the System > Event Log menu area, confirm the status 1173 - ArcContinuousFault.
OR:	On the user interface of the inverter, in the Notifications user menu, confirm the status 1173 - ArcContinuousFault.
CAUTION! Danger from damaged components of the PV system Serious personal injury/damage to property may result. Before the status 1173 - ArcContinuousFault is confirmed, the entire photovoltaic system affected must be checked for any possible damage. Damaged components must be repaired by qualified specialists.

1. Appendix

1. Appendix
2. Technical data

1. Appendix
2. Technical data

1. Appendix
2. Technical data

1. Appendix
2. Technical data