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

F57External Box Fault

Name in the manufacturer's documentation (user manual): External Box Fault[1]

In plain words (editorial)

Fault of the external box – during switching from on-grid to off-grid the box relay took too long. The manual says to check that the box works properly and that its communication wiring is correct.

When to call a service technician: 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. 210 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. 210 official manufacturer document quote verified During Switch On- Grid to Off-Grid, the waiting time forBoxrelay switching is too long
  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. 210 official manufacturer document quote verified Check whetherBoxis working properly
  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. 210 official manufacturer document quote verified Check whetherBoxcommunication wiring is correct