988
Communication error between Fronius Symo Hybrid and Fronius Smart Meter
Fronius · Solar Energy
What does 988 mean?
A communication error exists between the Fronius Symo Hybrid inverter and the Fronius Smart Meter. This results in no meter data being available, preventing battery operation, but grid feed-in resumes.
Common Causes
- Loose or damaged communication wiring between the inverter and Smart Meter
- Faulty communication interface on either device
- Smart Meter is powered off or malfunctioning
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the communication wiring between the Fronius Symo Hybrid inverter and the Fronius Smart Meter
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Solar Energy