Info What does this mean?
A status message, not a fault. It usually clears on its own and needs no action from you.
Fronius Inverter STATE 107 Error: Meaning, Causes & Safe Fix
STATE 107 means the inverter cannot detect the AC grid — it is waiting for acceptable grid conditions before it reconnects and resumes feeding power.
What should I do first?
Two quick questions — we'll point you to the right starting point.
Is this code still showing on your inverter's display?
Is your system producing power right now?
What this code means
STATE 107 ('No AC grid detected') is a Class 1 status code: the cause lies with the grid, not your inverter. The inverter disconnects from the grid, keeps testing grid conditions, and automatically resumes feeding power once the grid has been back within the permitted range for the required observation period. No device fault has occurred.Common causes
- A grid outage or blackout in your area
- A tripped AC breaker or switched-off grid isolator
- Utility maintenance work on the local network
- A loose AC connection at the inverter or switchboard
Safe steps to try
Work top to bottom, ticking off each step as you complete it. 0 of 5 done.
Is your inverter still under warranty?
Before paying for a repair, check — your installer may fix this free.
Based on typical standard warranty terms — always confirm with your warranty card or installer paperwork, as terms vary by model, region, and purchase date.
When to call an electrician
Contact your system installer if STATE 107 persists while the rest of your home has normal grid power — that points to a connection or inverter issue rather than a grid outage.
Frequently asked questions
Do I need to reset the inverter for STATE 107?
No — it reconnects automatically once the grid is stable. Just make sure breakers and isolators are switched on.
How long before it reconnects after a blackout?
The inverter must observe stable grid conditions for a set period (per your country's grid code) before resuming — typically a few minutes after power returns.
STATE 107 shows but my lights are on — what is wrong?
If your home has power but the inverter sees no grid, check the solar AC breaker and isolator. If they are on and the code persists, call your installer.
Sources: meaning and troubleshooting verified against the manufacturer's documentation — Fronius Operating Instructions (Symo/Primo) — 'Status codes and remedy' / 'STATE CODES' tables (Fronius docs 42,0410,0192 & 42,0410,1909 series)