313
Battery input voltage too high
Fronius · Solar Energy
What does 313 mean?
The battery input voltage has exceeded its permissible limits, leading to a short-term interruption of energy feeding into the grid. The inverter will attempt to restart its routine, and this code can occur sporadically without a persistent fault.
Common Causes
- Battery voltage exceeding safe operating parameters
- Incorrect battery connection
- Malfunctioning battery charge controller
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify the battery is switched on and properly connected
- 2
Check the battery voltage at the inverter input terminals
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Solar Energy