445

Compatibility error / Invalid power stage set configuration

Fronius · Solar Energy

What does 445 mean?

This code indicates either a compatibility error, such as after a PC board replacement, or an invalid configuration of the power stage set. This prevents the inverter from feeding energy into the grid.

Common Causes

  • Incompatible PC board replacement
  • Invalid power stage set configuration

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Update the inverter firmware

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

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