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SOFAR (Shenzhen SOFARSOLAR) · PV inverters · SOFAR 3.3–12KTLX-G3 (three-phase grid inverter)

ID05GFCI Fault

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

In plain words (editorial)

GFCI fault (residual/leakage current). If it is occasional, the external circuit was briefly abnormal and the inverter returns to normal automatically. If it is frequent and long-lasting, the manual says to check the insulation resistance between the PV array and earth and the insulation of the PV cables.

When to call a service technician: Have your installer check the PV insulation if the fault recurs.

✎ 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] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 69 official manufacturer document quote verified ID05 GFCIFault GFCI Fault
  2. [2] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 69 official manufacturer document quote verified is that the external circuits are abnormal occasionally
  3. [3] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 69 official manufacturer document quote verified check whether the insulation resistance between the PV array and earth(ground) is too low, then check the insulation conditions of PV cable
  4. [4] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 69 official manufacturer document quote verified normal operating status after the fault is rectified