Fronius Inverter Error Code 105
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Fronius error 105: AC frequency too high
Fronius error code 105 usually means the AC grid frequency is too high for the inverter to safely operate and export power. When this happens, your inverter may temporarily disconnect from the grid to protect the system.
This is usually not an internal inverter fault. It is a safety response that stops the inverter from feeding power into the grid when grid frequency falls outside the permitted operating range.
Grid frequency issues are typically related to conditions within the wider electricity network rather than the solar inverter itself. In some cases, temporary fluctuations can occur due to instability within the local grid.
Let e-Solar check your inverter and grid frequency
If the code appears once and clears by itself, your inverter may simply be reacting to a temporary grid condition. The inverter will usually continue monitoring the grid and resume normal operation once frequency returns to the permitted range.
If Fronius error code 105 keeps returning, it is worth having the system checked. Our Perth-based solar team can inspect the inverter, review your system settings and help determine whether the issue is linked to grid frequency, inverter configuration, site wiring or wider network conditions.
Contact e-Solar and let us know:
- The exact error code on the screen or app
- When the code appears
- Whether your solar production has dropped
- Your inverter model, if you know it
Do not open the inverter or attempt electrical testing yourself. If the issue is persistent, a qualified technician may need to inspect the inverter settings, test the grid supply and review whether the issue should be raised with the network provider.
Get In Touch Today
Not sure what the error code means? Send us a quick message with a photo of your inverter screen. We’ll help identify the issue and guide you towards the safest next step.
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Fronius Inverter Repairs and Fault Support
We understand that every solar system is different, which is why our repair and fault-finding services cover a wide range of Fronius inverter models. If your inverter is showing error code 105, our experienced technicians can help determine whether the issue is linked to grid voltage, inverter settings, site wiring or wider network conditions.
With over 22 years supporting Perth solar systems, e-Solar has seen all kinds of inverter faults and performance issues. We’ll assess your system safely, explain what the code means, and recommend the right next step to help get your solar running properly again.
Trust e-Solar for reliable Fronius inverter support backed by local experience, honest advice and long-term solar care.