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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.

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: April 2026

Related Faults

1Hardware fault102AC voltage too high103AC voltage too low
Source: Fronius Solar Energy
Open Manual (Page 126)Search more codes in this manual