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

ID67Bus undervoltage during grid connection

Name in the manufacturer's documentation (fault list): Bus undervoltage during grid connection[1]

In plain words (editorial)

The internal bus voltage is too low while connected to the grid. If the PV array is configured correctly, the manual says the sunlight may be too weak; the inverter returns to normal operation once irradiation is back to normal.

When to call a service technician: If it appears in good sunlight, 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] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 72 official manufacturer document quote verified Bus undervoltage during grid connection
  2. [2] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 72 official manufacturer document quote verified Once sun irradiation back to normal, inverter will work back normal
  3. [3] SOFAR 3.3~12KTLX-G3 – User Manual (2024-10) , p. 72 official manufacturer document quote verified If the configuration of the PV array is correct, could be the sun irradiation is too low