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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

976

Unregistered battery module detected

Fronius · Solar Energy

What does 976 mean?

A battery module is connected but has not been registered or activated, making battery operation impossible. Grid feed-in will resume.

Common Causes

  • New battery module connected without activation
  • Activation key not entered for the battery module

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Enter the activation key for the battery module

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

1Hardware fault102AC voltage too high103AC voltage too low
Source: Fronius Solar Energy
Open Manual (Page 131)Search more codes in this manual