If you see any of the symbols depicted in the "Safety rules" chapter, special care is required.

1. Safety rules

If you see any of the symbols depicted in the "Safety rules" chapter, special care is required.

1. Safety rules

• Injury or death to the operator or a third party
• Damage to the device and other material assets belonging to the operator

• Be suitably qualified,
• Have knowledge of and experience in dealing with electrical installations and
• Read and follow these Operating Instructions carefully.

In addition to the Operating Instructions, all applicable local rules and 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, pasted or painted over

• Injury or death to the operator or a third party
• Damage to the device and other material assets belonging to the operator

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 protection devices.

For the location of the safety and danger notices on the device, refer to the chapter headed "Warning notices on the device" in the Operating Instructions for your device.

Faults that could compromise safety must be remedied before switching on the device.

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 and leads must be secured, undamaged, insulated, and adequately dimensioned. Loose connections, scorched, damaged or inadequately dimensioned cables and leads must be immediately repaired by authorised personnel.

Repair work must only be carried out by authorised personnel.

It is impossible to guarantee that bought-in 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.

Components that are not in perfect condition must be changed immediately.

1. Safety rules

When installing devices with openings for cooling air, ensure that the cooling air can enter and exit unhindered through the air ducts. Only operate the charger in accordance with the degree of protection shown on the rating plate.

1. Safety rules

The sound power level of the inverter is specified in the Technical data.

The device is cooled as quietly as possible with the aid of an electronic temperature control system; this depends on the amount of converted power, the ambient temperature, the level of soiling 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 grid 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, then the operator is obliged to take action to rectify the situation.

1. Safety rules

The user is responsible for the safekeeping of any changes made to the factory settings. The manufacturer accepts no liability for any deleted personal settings.

1. Safety rules

Copyright of these operating instructions remains with the manufacturer.

The text and illustrations are all technically correct at the time of printing. We reserve the right to make changes. The contents of the operating instructions shall not provide the basis for any claims whatsoever on the part of the purchaser. If you have any suggestions for improvement, or can point out any mistakes that you have found in the instructions, we will be most grateful for your comments.

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 solar modules into alternating current. This alternating current is fed into the public grid synchronously with the grid voltage.
The inverter has been developed exclusively for use in grid-connected photovoltaic systems; it is impossible to generate energy independently of the public grid.

Thanks to its design and the way it works, the inverter is extremely safe both to install and to operate.
The inverter automatically monitors the public grid. In the event of abnormal grid conditions, the inverter ceases operating immediately and stops feeding power into the grid (e.g. if the grid is switched off, if there is an interruption, etc.).
The grid is monitored by monitoring the voltage, frequency and islanding conditions.

1. General information

The inverter transforms the direct current generated by the solar modules into alternating current. This alternating current is fed into the public grid synchronously with the grid voltage.
The inverter has been developed exclusively for use in grid-connected photovoltaic systems; it is impossible to generate energy independently of the public grid.

Thanks to its design and the way it works, the inverter is extremely safe both to install and to operate.
The inverter automatically monitors the public grid. In the event of abnormal grid conditions, the inverter ceases operating immediately and stops feeding power into the grid (e.g. if the grid is switched off, if there is an interruption, etc.).
The grid is monitored by monitoring the voltage, frequency and islanding conditions.

1. General information
2. Description of the device

The inverter transforms the direct current generated by the solar modules into alternating current. This alternating current is fed into the public grid synchronously with the grid voltage.
The inverter has been developed exclusively for use in grid-connected photovoltaic systems; it is impossible to generate energy independently of the public grid.

Thanks to its design and the way it works, the inverter is extremely safe both to install and to operate.
The inverter automatically monitors the public grid. In the event of abnormal grid conditions, the inverter ceases operating immediately and stops feeding power into the grid (e.g. if the grid is switched off, if there is an interruption, etc.).
The grid is monitored by monitoring the voltage, frequency and islanding conditions.

1. General information
2. Description of the device

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. Description of the device

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. Description of the device

With Fronius Solar.web or Fronius Solar.web Premium, the PV system can be easily monitored and analysed by the system owner and installer. If configured accordingly, the inverter transmits data such as power, yields, load, and energy balance to Fronius Solar.web. For more information see Solar.web - monitoring & analysis.

Configuration is carried out via the setup wizard, see chapter Installation with the app on page (→) or Installation using the web browser on page (→).

• Internet connection (download: min. 512 kBit/s, upload: min. 256 kBit/s)*.
• User account on solarweb.com.
• Completed configuration via the setup wizard.

1. General information
2. Description of the device

The inverter can be found via the Multicast DNS protocol (mDNS). It is recommended to search for the inverter by 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 and in 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 damage.

Symbols on the rating plate:
	CE mark – confirms compliance with applicable EU directives and regulations.
	UKCA mark – confirms compliance with applicable UK directives and regulations.
	WEEE mark – 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 mark – tested in accordance with the requirements of Australia and New Zealand.
	ICASA mark – tested in accordance with the requirements of the Independent Communications Authority of South Africa.
	CMIM mark – tested in accordance with 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.
	Before opening the machine, wait for the capacitors to discharge!

Text of the warning notices:

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

1. General information
2. Protection of people and equipment

The wired shutdown (WSD) interrupts the inverter feeding energy into the grid if the trigger device (switch, e.g. emergency stop or fire alarm switch) has been activated.

If an inverter (secondary device) fails, it is bypassed and the other inverters continue operating. If a second inverter (secondary device) or the inverter (primary device) 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 offers the option to use the integrated AC relays as coupling 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 the chapter "WSD (Wired Shut Down)".

1. General information
2. Protection of people and equipment

The inverter is equipped with a universal current-sensitive residual current monitoring unit (RCMU = Residual Current Monitoring Unit) in accordance with IEC 62109-2 and IEC63112.
This device monitors residual currents from the PV module to the AC output of the inverter and disconnects the inverter from the grid in the event of unauthorised residual current.

1. General information
2. Protection of people and equipment

The inverter is equipped with an integrated surge protective device on the DC and AC side in accordance with IEC 62109-2. The surge protective device protects the system against damage in the event of a surge.

1. General information
2. Protection of people and equipment

		The surge protective 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 protective device is triggered, the colour of the indicator changes from green to red (mechanical display). A tripped SPD must be replaced immediately by an authorised 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 protective 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

• Utilisation for any other purpose, or in any other manner
• Making any modifications to the inverter that have not been expressly approved by Fronius
• Installation of parts that are not distributed or expressly approved by Fronius

The manufacturer shall not be liable for any damage resulting from such use. All warranty claims will be forfeited.

Intended use also includes complying with all the instructions in the Operating Instructions.

1. General information
2. Proper use

• Utilisation for any other purpose, or in any other manner
• Making any modifications to the inverter that have not been expressly approved by Fronius
• Installation of parts that are not distributed or expressly approved by Fronius

The manufacturer shall not be liable for any damage resulting from such use. All warranty claims will be forfeited.

Intended use also includes complying with all the instructions in the Operating Instructions.

1. General information
2. Proper use

The inverter is designed to be connected and used exclusively in conjunction with solar modules.
Use of the inverter with other DC generators (e.g. wind generators) is not permitted.

When designing the photovoltaic system, ensure that all of its components are operated within their permitted operating ranges at all times.

Observe all the measures recommended by the solar module manufacturer to ensure that the solar module retains its properties in the long term.

1. General information

The inverter operates fully automatically. As soon after sunrise as there is sufficient energy available from the solar modules, the inverter starts checking the PV system (insulation measurement), and the grid (grid voltage and grid frequency). If all values are within the normative scope, automatic connection to the grid and feeding of energy into the grid takes place.

The inverter works in a way that ensures the maximum power possible is obtained from the solar modules. This is known as "Maximum Power Point Tracking" (MPPT). In the event of shading of the solar modules, the function "Dynamic Peak Manager" can be used to obtain the majority of the local maximum output (LMPP) of the PV system.

After dusk, as soon as the power available has fallen below the level at which energy can be fed into the grid, the inverter disconnects the power electronics completely from the grid and stops running. It retains all its settings and stored data.

1. General information
2. Functional principle

The inverter operates fully automatically. As soon after sunrise as there is sufficient energy available from the solar modules, the inverter starts checking the PV system (insulation measurement), and the grid (grid voltage and grid frequency). If all values are within the normative scope, automatic connection to the grid and feeding of energy into the grid takes place.

The inverter works in a way that ensures the maximum power possible is obtained from the solar modules. This is known as "Maximum Power Point Tracking" (MPPT). In the event of shading of the solar modules, the function "Dynamic Peak Manager" can be used to obtain the majority of the local maximum output (LMPP) of the PV system.

After dusk, as soon as the power available has fallen below the level at which energy can be fed into the grid, the inverter disconnects the power electronics completely from the grid and stops running. It retains all its settings and stored data.

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

If the inverter becomes too hot, it automatically reduces the current output power in order to protect itself. Reasons for the inverter becoming too hot include too high an ambient temperature or inadequate heat dissipation (e.g. when installed in containers without proper heat dissipation measures).

A power derating system restricts the output from the inverter in order to prevent the temperature from exceeding the permissible value.
If a maximum temperature is exceeded, the inverter switches off in a safe state and does not resume feeding energy into the grid until 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. Control elements 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. Control elements and connections

1. General information
2. Control elements and connections

1. General information
2. Control elements and connections

1. General information
2. Control elements and connections

1. General information
2. Control elements and connections

1. General information
2. Control elements and connections

1. General information
2. Control elements and connections

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

1. General information
2. Control elements and connections

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

1. General information
2. Control elements 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. Control elements and connections

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

1. General information
2. Control elements and connections

*Not in use

1. General information
2. Control elements and connections

On the V+/GND pin, it is possible to feed in a voltage of around 12.5–24 V (+ max. 20%) with an external power supply. The outputs IO 0–5 can then be operated with the external voltage. A maximum of 1 A can be drawn per output, with a maximum of 3 A allowed in total. The fuse protection must be located externally.

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

1. General information
2. Control elements and connections

	The status of the inverter is shown via the operating status LED. In the event of faults, carry out the individual steps in the Fronius Solar.web live app.
	The optical sensor is actuated by touching with a finger.
	The status of the connection is shown via the communication LED. To establish the connection, carry out the individual steps in the Fronius Solar.web live app.

Sensor functions
		1x    = WLAN access point (AP) is opened.    Flashing blue
		2x    = WLAN Protected Setup (WPS) is activated.    Flashing green
		3 seconds    (max. 6 seconds) = the service message is acknowledged.    Flashing white (rapidly)

LED status indicator
		The inverter is operating correctly.    Lights up green
		The inverter starts.    Flashing green
		The inverter is in standby, is not operational (e.g. no feed-in at night) or is not configured.    Lights up yellow
		The inverter indicates a non-critical status.    Flashing yellow
		The inverter indicates a critical status and there is no grid power feed process.    Lights up red
		The network connection is being established via WPS. 2x  = WPS search mode.    Flashing green
		The network connection is being established via WLAN AP. 1x  = WLAN AP search mode (active for 30 minutes).    Flashing blue
		The network connection is not configured.    Lights up yellow
		The inverter is operating correctly, a network fault is indicated.    Lights up red
		The inverter is performing an update.    /    Flashing blue
		There is a service message.    Lights up white

All installed components 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 commissioning

All installed components 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 commissioning
2. General

All installed components 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 commissioning

Please note 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 AC disconnector option: -35 °C / +65 °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.

When installing the inverter on the outer walls of cattle sheds, it is important to keep a minimum clearance of 2 m between all sides of the inverter and air vents 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 solar 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. Observe the national regulations.)
• Covered car park 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 resistant to water jets from any direction and can also be used in damp environments.
		The inverter is suitable for outdoor installation. To keep the heating of the inverter as low as possible, it is better not to expose the inverter to direct sunlight. Mount the inverter in a protected location, for example below the solar modules or under a roof overhang.
		IMPORTANT! The inverter must not be installed or used at altitudes above 4000 m.
		Do not install the inverter in: Areas where it may be exposed to ammonia, corrosive gases, acids or salts (e.g. fertiliser storage areas, vent openings for livestock stables, chemical plants, tanneries, etc.)
		Due to the noise generated by the inverter under certain operating conditions, it should not be installed close to living areas.
		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-tight (IP 65). However, in areas with high dust accumulation, the cooling surfaces may collect dust and this may impair the thermal performance. In such cases, regular cleaning is required. Consequently, we do not recommend installation in places and environments with strong dust formation.

1. Installation and commissioning
2. Installation location and position

Please note 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 AC disconnector option: -35 °C / +65 °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.

When installing the inverter on the outer walls of cattle sheds, it is important to keep a minimum clearance of 2 m between all sides of the inverter and air vents 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 solar 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. Observe the national regulations.)
• Covered car park 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 resistant to water jets from any direction and can also be used in damp environments.
		The inverter is suitable for outdoor installation. To keep the heating of the inverter as low as possible, it is better not to expose the inverter to direct sunlight. Mount the inverter in a protected location, for example below the solar modules or under a roof overhang.
		IMPORTANT! The inverter must not be installed or used at altitudes above 4000 m.
		Do not install the inverter in: Areas where it may be exposed to ammonia, corrosive gases, acids or salts (e.g. fertiliser storage areas, vent openings for livestock stables, chemical plants, tanneries, etc.)
		Due to the noise generated by the inverter under certain operating conditions, it should not be installed close to living areas.
		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-tight (IP 65). However, in areas with high dust accumulation, the cooling surfaces may collect dust and this may impair the thermal performance. In such cases, regular cleaning is required. Consequently, we do not recommend installation in places and environments with strong dust formation.

1. Installation and commissioning
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 commissioning

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 commissioning
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 commissioning
2. Transport

1. Installation and commissioning

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 correct type of fixing.

1. Installation and commissioning
2. Mounting 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 correct type of fixing.

1. Installation and commissioning
2. Mounting the inverter

Dimensions of the mounting bracket - all dimensions in mm.

1. Installation and commissioning
2. Mounting 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 commissioning
2. Mounting 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 commissioning

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

Aluminium cables can be connected to the grid connections.

1. Installation and commissioning
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 meet this temperature requirement, pass the protective hose (item number: 4,251,050) over the phases (L1 / L2 / L3) and neutral conductor (N). The earthing PE does not have 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. Two sets of protective hoses are therefore required for the AC Daisy Chain option.

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

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

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

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

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

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

1

2

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

1

1. Installation and commissioning
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 commissioning
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 commissioning
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 commissioning
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 commissioning
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 commissioning

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

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

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

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

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

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

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

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

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

Divide the existing solar module strings evenly between the PV inputs (PV1 / PV2 / PV3) of the inverter.
Start with the odd inputs first and only then fill up the even inputs to divide the power as evenly as possible and extend the service life of the fuses, e.g.: (1.1, 2.1, 3.1, 1.3, 2.3...)

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

1

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

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

1. Installation and commissioning
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 commissioning
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 commissioning
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 commissioning
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 (30A fuses) string 1.1 - 3.5 /
Fronius Tauro Eco 50-3-D string 1.1 - 2.7 /
Tauro Eco 50-3-D (30A 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 (30A 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 commissioning
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 commissioning

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 commissioning
2. Connecting the data communication cable

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 commissioning
2. Connecting the data communication cable

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

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

1. Installation and commissioning
2. Connecting the data communication cable

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

1. Installation and commissioning
2. Connecting the data communication cable

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 commissioning
2. Connecting the data communication cable

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 (primary device). The WSD switch of all other inverters should be in the 0 (secondary device) position.

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, they must be connected in series.

1. Installation and commissioning

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

If the setup process is cancelled before the process is complete, any data that has been input up to this point is lost and the start screen with the installation wizard is shown again. If the process is interrupted, such as in the event of a power outage, the data is saved. Commissioning may be continued from the point at which the process was interrupted once the power supply has been 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, please contact your installer / Technical Support team.

1. Installation and commissioning
2. Using for the first time

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

If the setup process is cancelled before the process is complete, any data that has been input up to this point is lost and the start screen with the installation wizard is shown again. If the process is interrupted, such as in the event of a power outage, the data is saved. Commissioning may be continued from the point at which the process was interrupted once the power supply has been 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, please contact your installer / Technical Support team.

1. Installation and commissioning
2. Using for the first time

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

1. Installation and commissioning
2. Using for the first time

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 commissioning
2. Using for the first time

WLAN:

1Open the access point by touching the sensor   

✓Communication 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 on a Windows 10 operating system, the link "Connect using a security key instead" must first be activated to establish a connection with the password.

4In the browser address bar, enter and confirm the IP address 192.168.250.181. The installation wizard is opened.

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

6Add 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.

Ethernet:

1Establish a connection to the inverter (LAN1) with a network cable (CAT5 STP or higher).

2Open the access point by touching the sensor once   

✓Communication LED flashes blue.

3In the browser address bar, enter and confirm IP address 169.254.0.180. The installation wizard is opened.

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

5Add 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 commissioning

1

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

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

1. Installation and commissioning
2. Switching off current supply and restarting the inverter

1

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

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

IMPORTANT!
Depending on the user's authorization, settings can be executed in the individual menus.

1. Settings - user interface of the inverter

IMPORTANT!
Depending on the user's authorization, settings can be executed in the individual menus.

1. Settings - user interface of the inverter
2. User settings

IMPORTANT!
Depending on the user's authorization, settings can be executed in the individual menus.

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

Load management
Up to four pins can be selected here for load management. Other load management settings 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 enabled and no DRM control is connected, the inverter switches to Standby mode.

1. Settings - user interface of the inverter
2. Device configuration

A value for the apparent power consumption and apparent power output can be entered here for the Australia country setup.

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 the function is activated, the feed-in mode of the inverter is interrupted. This enables a powerless shutdown of the inverter and protects its components. When the inverter is restarted, the standby function is automatically deactivated.

"PV 1" and "PV 2"

"Ripple Control"
Ripple control signals are signals sent out by the energy company to switch controllable loads on and off. Depending on the installation situation, ripple control signals may be attenuated or amplified by the inverter. The settings below can be used to counteract this if necessary.

"Measures against RCD/RCMU false trips"
(when using a 30 mA residual current circuit breaker)

"Iso 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 made available on the product page and in the "Download search" area under www.fronius.com .

The update will start.

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
All configuration data is reset with the exception of the country setup. Changes to the country setup may only be carried out by authorized personnel.

All settings with no network
All configuration data is reset with the exception of the country setup and the network settings. Changes to the country setup may only be carried out by authorized personnel.

1. Settings - user interface of the inverter
2. System

Current Messages
All current events of the connected system components are shown here.

IMPORTANT!
Depending on the type of event, these must be confirmed via the "tick" button in order to be processed further.

History
All events of the connected system components that no longer exist are shown here.

1. Settings - user interface of the inverter
2. System

This menu displays all system information and the current settings.

The PDF is created and displayed.

1. Settings - user interface of the inverter
2. System

The licence file contains the performance data and the scope of functions of the inverter. When replacing the inverter, power stage set or data communication area, the licence file must also be replaced.

The licence activation starts.

The licence activation starts.

1. Settings - user interface of the inverter
2. System

The support user is enabled.

IMPORTANT!
The support user only allows Fronius Technical Support to implement settings on the inverter via a secure connection. The button "Terminate Support User Session" deactivates the access.

The sdp.cry file is saved in the downloads.

Remote maintenance access for the Fronius Support team is enabled.

IMPORTANT!
Remote maintenance access gives Fronius Technical Support exclusive access to the inverter via a secure connection. Diagnostic data is transmitted here that can be used for troubleshooting purposes. Only enable remote maintenance access following a request from the Fronius Support team.

1. Settings - user interface of the inverter

• Tcp fronius-se-iot.azure-devices.net:8883
• Tcp fronius-se-iot-telemetry.azure-devices.net:8883
• Tcp fronius-se-iot-telemetry.azure-devices.net:443
• Udp sera-gen24.fronius.com:1194 (213.33.117.120:1194)
• Tcp cure-se.fronius.com:443
• Tcp firmware-download.fronius.com:443
• Tcp froniusseiot.blob.core.windows.net:443
• Tcp provisioning.solarweb.com:443
• Upd/Tcp 0.time.fronius.com:123

When using FRITZ!Box products, the Internet access must be configured to be unlimited and unrestricted. The DHCP Lease Time (validity) must not be set to 0 (=infinite).

LAN:

After connecting, the status of the connection should be checked (see "Internet Services" on page (→)).

WLAN:

Establishing a connection via WPS:

☐

The access point of the inverter must be active. It is opened by touching the sensor    → communication 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 on a Windows 10 operating system, the link "Connect using a security key instead" must first be activated to establish a connection with the password.

3.

In the browser address bar, enter and confirm the IP address 192.168.250.181.

4.

In Network Settings, click on the "Enable" button under WLAN - WPS.

5.

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

6.

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

7.

Log in to the user interface of the inverter.

8.

Check network details and Fronius Solar.web connection

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 on a Windows 10 operating system, the link "Connect using a security key instead" must first be activated to establish a connection with the password.

3In the browser address bar, enter and confirm the IP address 192.168.250.181.

4In Network Settings, click on the "Enable" button under WLAN - WPS.

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

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

7Log in to the user interface of the inverter.

8Check network details and Fronius Solar.web connection

After connecting, the status of the connection should be checked (see "Internet Services" on page (→)).

Select and connect WLAN network:
The networks found are shown in the list. Clicking on the refresh button    will carry out a second search of the available WLAN networks. The "Find network" input field can be used to further restrict the selection list.

1Select network from the list.

2Select connection type "automatic" or "static".

3For connection type "automatic": enter WLAN password and host name.

4For connection type "static": enter IP address, subnet mask, DNS and gateway.

5Click on the "Connect" button.

✓The connection is established.

After connecting, the status of the connection should be checked (see "Internet Services" on page (→)).

Access point:

The inverter serves as an access point. A PC or smart device connects directly to the inverter. It is not possible to connect to the internet. The "Network name (SSID)" and "Network key (PSK)" can be assigned in this menu.
It is possible to operate a connection via WLAN and via access point simultaneously.

1. Settings - user interface of the inverter
2. Communication

• Tcp fronius-se-iot.azure-devices.net:8883
• Tcp fronius-se-iot-telemetry.azure-devices.net:8883
• Tcp fronius-se-iot-telemetry.azure-devices.net:443
• Udp sera-gen24.fronius.com:1194 (213.33.117.120:1194)
• Tcp cure-se.fronius.com:443
• Tcp firmware-download.fronius.com:443
• Tcp froniusseiot.blob.core.windows.net:443
• Tcp provisioning.solarweb.com:443
• Upd/Tcp 0.time.fronius.com:123

When using FRITZ!Box products, the Internet access must be configured to be unlimited and unrestricted. The DHCP Lease Time (validity) must not be set to 0 (=infinite).

LAN:

After connecting, the status of the connection should be checked (see "Internet Services" on page (→)).

WLAN:

Establishing a connection via WPS:

☐

The access point of the inverter must be active. It is opened by touching the sensor    → communication 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 on a Windows 10 operating system, the link "Connect using a security key instead" must first be activated to establish a connection with the password.

3.

In the browser address bar, enter and confirm the IP address 192.168.250.181.

4.

In Network Settings, click on the "Enable" button under WLAN - WPS.

5.

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

6.

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

7.

Log in to the user interface of the inverter.

8.

Check network details and Fronius Solar.web connection

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 on a Windows 10 operating system, the link "Connect using a security key instead" must first be activated to establish a connection with the password.

3In the browser address bar, enter and confirm the IP address 192.168.250.181.

4In Network Settings, click on the "Enable" button under WLAN - WPS.

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

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

7Log in to the user interface of the inverter.

8Check network details and Fronius Solar.web connection

After connecting, the status of the connection should be checked (see "Internet Services" on page (→)).

Select and connect WLAN network:
The networks found are shown in the list. Clicking on the refresh button    will carry out a second search of the available WLAN networks. The "Find network" input field can be used to further restrict the selection list.

1Select network from the list.

2Select connection type "automatic" or "static".

3For connection type "automatic": enter WLAN password and host name.

4For connection type "static": enter IP address, subnet mask, DNS and gateway.

5Click on the "Connect" button.

✓The connection is established.

After connecting, the status of the connection should be checked (see "Internet Services" on page (→)).

Access point:

The inverter serves as an access point. A PC or smart device connects directly to the inverter. It is not possible to connect to the internet. The "Network name (SSID)" and "Network key (PSK)" can be assigned in this menu.
It is possible to operate a connection via WLAN and via access point simultaneously.

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

Remote control and Profiles
The grid operator/energy supplier can influence the output power of the inverter by means of remote control. The prerequisite for this is for the inverter to have an active internet connection.

*) Cloud Control
A virtual power plant is an interconnection of several power plant operators to form a network. This network can be controlled via the cloud over the internet. The inverter must have an active internet connection for this. System data is transmitted.

1. Settings - user interface of the inverter
2. Communication

The Fronius Solar API is an IP-based, open JSON interface. When enabled, IOT devices on the local network can access inverter information without authentication. For security reasons, the interface is deactivated at the factory and must be activated 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.

When performing a firmware update to version 1.14.x, the setting of the Fronius Solar API is adopted. The Solar API is activated for systems with a version below 1.14.x. Above this version it is deactivated but can be switched on and off in the menu.

Activate the Fronius Solar API
Enable the "Activate communication via Solar API" function on the user interface of the inverter in the "Communication" → "Solar API" menu.

1. Settings - user interface of the inverter
2. Communication

This menu displays information about the connections and the current connection status. In case of problems with the connection, a short error description is shown.

1. Settings - user interface of the inverter

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

The selected country setup for the respective country contains preset parameters according to the nationally applicable standards and requirements. Depending on local grid conditions and the specifications of the energy provider, adjustments to the selected country setup may be necessary.

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 authorised specialist companies. To request the access code required for this menu area, see chapter Requesting inverter codes in Solar.SOS.

The selected country setup for the respective country contains preset parameters according to the nationally applicable standards and requirements. Depending on local grid conditions and the specifications of the energy provider, adjustments to the selected country setup may be necessary.

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 authorised specialist companies. The inverter access code required for this menu area can be requested in the Fronius Solar.SOS portal.

Requesting inverter codes in Solar.SOS:

1.

Go to solar-sos.fronius.com in a browser

2.

Log in with your Fronius account

3.

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

4.

Select the menu item Show inverter codes

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 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

1Go to solar-sos.fronius.com in a browser

2Log in with your Fronius account

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

4Select the menu item Show inverter codes

✓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 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 visualised in Fronius Solar.web and are available for analysis.

1. Settings - user interface of the inverter
2. Safety and grid requirements

General
In this menu item, settings relevant for a distribution network operator (DNO) are made. An effective power limitation in % and/or a power factor limitation can be set.

IMPORTANT!
Select the "Technician" user for settings in this menu item, enter and the password for the "Technician" user and confirm. Settings in this menu area must 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 = grey (not used)

"Power factor (cos φ)"
"ind" = inductive
"cap" = capacitive

"DNO feedback"
When the rule is enabled, output "DNO feedback" (pin 1 recommended) must be configured (e.g. for operating a signalling device).

For "Import" or "Export", the data format *.fpc is supported.

Control priorities
For setting the control priorities for the ripple control signal receiver, the export limitation and control via Modbus.

1 = highest priority, 3 = lowest priority

1. Settings - user interface of the inverter
2. Safety and grid requirements

The ripple control signal receiver and the I/Os terminal of the inverter can be connected to one another in accordance with the connection diagram.
If the distance between the inverter and the ripple control signal receiver exceeds 10 m, at least a CAT 5 cable is recommended and the shield must be connected at one end to the push-in terminal of the data communication area (SHIELD).

The settings for 4-relay mode are stored.

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 receiver and the I/Os terminal of the inverter can be connected to one another in accordance with the connection diagram.
If the distance between the inverter and the ripple control signal receiver exceeds 10 m, at least a CAT 5 cable is recommended and the shield must be connected at one end to the push-in terminal of the data communication area (SHIELD).

The settings for 3-relay mode are stored.

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 receiver and the I/Os terminal of the inverter can be connected to one another in accordance with the connection diagram.
If the distance between the inverter and the ripple control signal receiver exceeds 10 m, at least a CAT 5 cable is recommended and the shield must be connected at one end to the push-in terminal of the data communication area (SHIELD).

The settings for 2-relay mode are stored.

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 receiver and the I/Os terminal of the inverter can be connected to one another in accordance with the connection diagram.
If the distance between the inverter and the ripple control signal receiver exceeds 10 m, at least a CAT 5 cable is recommended and the shield must be connected at one end to the push-in terminal of the data communication area (SHIELD).

The settings for 1-relay mode are stored.

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 showing ripple control receiver with multiple inverters

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

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

IMPORTANT!
The "4-relay mode" setting (see Connection diagram - 4 relay andI/O power management settings - 4 relays) must be enabled on the user interface of each inverter connected to the ripple control receiver.

1. Appendix

1. Appendix
2. Status codes and remedy

1173 - ArcContinuousFault (operation LED: lights up red)

Cause:	An arc on the PV system was detected and the maximum number of automatic switch-ons within 24 hours was reached.
Remedy:	Press and hold the sensor on the inverter for 3 seconds  (max. 6 seconds).
OR:	Confirm the status "1173 - ArcContinuousFault" in the "System” → "Event Log" menu area on the user interface of the inverter.
OR:	Confirm the status "1173 - ArcContinuousFault" in the "Notifications" user menu on the user interface of the inverter.
CAUTION! Danger from damaged components of the photovoltaic system This can result in severe personal injury/damage to property. Before the status "1173 - ArcContinuousFault" is confirmed, the entire photovoltaic system in question must be checked for possible damage. Have damaged components repaired by qualified personnel.

1. Appendix

1. Appendix
2. Technical data

1. Appendix
2. Technical data

1. Appendix
2. Technical data

1. Appendix
2. Technical data