GoodWe · PV inverters · GoodWe ET G2 6–15 kW (three-phase hybrid inverter)
F85N-Bus Overvoltage (Auxiliary CPU1)
Name in the manufacturer's documentation (user manual): N-Bus Overvoltage (Auxiliary CPU1)
[1]
This page only quotes the original English documentation. A plain-language explanation has not been written yet, so the page is not indexed by search engines.
For technicians
Possible causes (source text)
- PVvoltage is too high;[2]
- InverterBUSvoltag e sampling is abnormal;[3]
- The isolation effect of the dual- split transformer at the inverter rear end is poor, causing two inverters to affect each other when connected to the grid; one of the inverters reports DC overvoltage when connected to the grid;[4]
⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.
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] 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. 217 official manufacturer document quote verified
- [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. 217 official manufacturer document quote verified
PVvoltage is too high
- [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. 217 official manufacturer document quote verified
InverterBUSvoltag e sampling is abnormal
- [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. 217 official manufacturer document quote verified
The isolation effect of the dual- split transformer at the inverter rear end is poor, causing two inverters to affect each other when connected to the grid; one of the inverters reports DC overvoltage when connected to t…