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GoodWe · PV inverters · GoodWe ET G2 6–15 kW (three-phase hybrid inverter)

F26Generator Frequency Low

Name in the manufacturer's documentation (user manual): Generator Frequency Low[1]

In plain words (editorial)

The generator frequency is too low. The manual says this fault does not affect normal off-grid operation; if no generator is connected, ignore it. If the generator has a fault, the code is normal and clears automatically some time after the generator recovers.

When to call a service technician: If a working generator is connected and the code stays, contact your installer.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 201 official manufacturer document quote verified
  2. [2] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 201 official manufacturer document quote verified When the generator is not connected, ignore this fault
  3. [3] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 201 official manufacturer document quote verified It is normal for this fault to occur when the generator has a fault. After the generator recovers, wait for a period of time, and the fault will be automatically cleared
  4. [4] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 201 official manufacturer document quote verified This fault will not affect the normal operation of off-grid mode
  5. [5] GoodWe Residential Smart Inverter Solutions – ET G2 6-15K (+ LX F / LX D) – User Manual V2.2 (2026-09-30) (V2.2-2026-09-30) , p. 201 official manufacturer document quote verified If the generator and the grid are connected at the same time and meet the safety regulation requirements, the grid will be prioritized for grid connection, and the system will operate in grid- connected state