751

Time lost

Fronius · Solar Energy

What does 751 mean?

The inverter's internal clock has lost its time setting, resulting in inaccurate timestamps. A warning message is shown on the display.

Common Causes

  • Loss of internal clock power source (e.g., battery, capacitor)
  • Real Time Clock (RTC) module malfunction

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reset the time and date on the inverter

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Verified technical data. Last updated: March 2026

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Fronius Error 751: Time lost — Troubleshooting Guide | ErrorLib