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301

Fronius Symo Hybrid Inverter Code 301 — Overcurrent (AC)

Fronius · Solar Inverters

What does 301 mean?

A temporary overcurrent condition has been detected on the AC side, causing a short-term interruption in feeding energy into the grid. The inverter will automatically attempt to restart its operation.

Common Causes

  • Sudden surge in AC current
  • Temporary grid disturbance
  • Internal inverter AC component issue

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Observe the inverter to see if it successfully repeats its start-up routine and resumes operation.

  2. 2

    Check your electrical panel for any tripped circuit breakers related to the inverter's AC connection.

  3. 3

    If the status code is displayed all the time, notify a Fronius-trained service engineer.

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

Related Faults

1Error 1 (Binary 0001) — Hardware fault10Error 10 (Binary 1010) — General fieldbus error102Fronius Symo Hybrid Inverter Code 102 — AC voltage too high
Source: Fronius Solar Inverters
Open Manual (Page 124)Search more codes in this manual