313

Battery input voltage too high

Fronius · Solar Energy

What does 313 mean?

The battery input voltage has exceeded its permissible limits, leading to a short-term interruption of energy feeding into the grid. The inverter will attempt to restart its routine, and this code can occur sporadically without a persistent fault.

Common Causes

  • Battery voltage exceeding safe operating parameters
  • Incorrect battery connection
  • Malfunctioning battery charge controller

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the battery is switched on and properly connected

  2. 2

    Check the battery voltage at the inverter input terminals

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Verified technical data. Last updated: March 2026

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