General Information

When should I update my inverter and how do I do this?
Updates should only be carried out when recommended by Fronius or a Fronius Service Partner. The latest version of Fronius Solar.update/IG can be downloaded from our website.
When you run the file, you are guided through the entire, self-explanatory update procedure.
The update may be carried out by the installation engineer using an update card or by the customer using the Datalogger.
Installation engineers can order an update card from the Service Hotline.

What points should I note when running an update on my inverter?
The update should only be carried out in constant irradiance and good weather conditions.

What is the distortion factor of an inverter?
The distortion factor is an indication of the residual ripple of the output current from the inverter, i.e. the extent to which the current delivered by the Fronius IG deviates from the ideal sinusoidal mains current.

What is the difference between the maximum efficiency and the Euro efficiency?
The maximum efficiency is the highest efficiency that can be achieved by a unit. The Euro efficiency, on the other hand, relates to the efficiency of the inverter under various partial loads.

Where can I look up the meaning of an error code on the display?
The operating instructions contain a list of all the error codes that can occur while the unit is in use.

Who is my contact in the event of a fault?
If, contrary to expectations, a fault does occur in your inverter, please contact your system installer, who can arrange all the necessary steps using the Fronius Service Hotline.

Who may open my inverter in the event of a fault?
In principle, any electrician can open the unit and troubleshoot with support from the Fronius Service Hotline. If a defective board in the unit has to be replaced, this must only be done by licensed Fronius Service Partners (FSP).

Why does my inverter not display at night?
The inverter is powered by the solar modules, so there is no display at night. The DATCOM components, on the other hand, are powered off the mains supply, but have a very low power consumption.

The mains fuse upstream of my inverter constantly trips. What can I do?
This is very likely caused by a fault in the power module. Please contact your electrical installation engineer, who will arrange for the unit to be replaced or serviced, if necessary (Fronius Service Partners only).

How can I tell if my inverter is working?
Units from the Fronius IG series have a self-diagnosis system that outputs a status message on the display in the format “STATE XXX” in the event of a fault. A list of all the codes that can occur during operation is given in the operating instructions.
If everything is working correctly, the display contains information about all the important system data.

Why are the readings on the electricity company’s meter and the inverter display different?
The electricity company's meters are legally calibrated measuring instruments that must fulfil certain criteria with respect to their tolerances. The inverter, on the other hand, is not a legally calibrated measuring instrument. The displayed energy is calculated from the measured current and the measured voltage and is intended to provide an overview of the amount of energy supplied.

My inverter outputs an insulation message when it starts up that I have to acknowledge. Is it still working in feed-in mode?
If the di-electric resistance of your PV system is less than 1 MW, but greater than 500 kW, the unit outputs an information message that does not affect feed-in mode. However, if error code 502 appears on the display, this indicates that the dielectric resistance of the PV generator is too low. Please contact your installation engineer in order to check the insulation of your PV generator.