306
Not enough PV power or no battery power requested
Fronius · Solar Energy
What does 306 mean?
There is insufficient PV power available for feeding energy into the grid, and simultaneously, no power has been requested from the battery. This results in a short-term interruption while the inverter repeats its start-up routine. This is often displayed routinely early morning or evening due to low insolation and may not indicate a fault.
Common Causes
- Insufficient solar insolation (e.g., early morning, evening, cloudy weather)
- No power request from the energy management system
Repair Steps & Checklist
Click steps to track your progress.
- 1
Observe the solar insolation levels and wait for sufficient sunlight
- 2
Verify if any energy management commands are pending or active
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Solar Energy