Operating instructions Fronius Tauro, Fronius Tauro Eco

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

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

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

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

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.

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.

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.

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).

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.

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.

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.

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).

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.

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.

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.

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.

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 (→).

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 (→).

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

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.

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 (→).

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 (→).

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.

		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.

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.

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

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

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.

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.

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

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.

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.

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.

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:

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.

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

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Dimensions of the mounting bracket—all dimensions in mm.

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

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

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

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

Aluminum cables can also be connected to the AC connections.

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.

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.

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!

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

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

1

2

3

4

5

6

7

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

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

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

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.

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:

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.

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.

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.).

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.

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

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.

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.

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.

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

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

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

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.

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.

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.

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.

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.

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.

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

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

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

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

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

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.

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

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

"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"

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

The guided setup wizard can be accessed here.

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.

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.

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

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.

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.

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.

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.

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:

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.

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.

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.

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.

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.

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.

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