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. 1

    Check the communication wiring between the Fronius Symo Hybrid inverter and the Fronius Smart Meter

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Verified technical data. Last updated: March 2026

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