102
AC voltage too high
Fronius · Solar Energy
What does 102 mean?
The AC voltage from the public grid is detected as excessively high. The inverter temporarily disconnects from the grid and will resume feeding energy once grid conditions return to the permissible range.
Common Causes
- Excessively high AC voltage from the public grid
- Poor grid connection quality
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check all AC grid connections at the inverter and point of common coupling
Verified technical data. Last updated: March 2026
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Source: Fronius Solar Energy