987
Undertemperature at Fronius Solar Battery
Fronius · Solar Energy
What does 987 mean?
The Fronius Solar Battery has tripped due to an undertemperature condition. Battery operation is no longer possible, but grid feed-in resumes.
Common Causes
- Excessively low ambient temperature around the Fronius Solar Battery
Repair Steps & Checklist
Click steps to track your progress.
- 1
Increase the ambient temperature around the Fronius Solar Battery
- 2
Switch off the Fronius Solar Battery, allow it to warm up for an appropriate amount of time, then activate it again
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Solar Energy