SolarEdge · PV inverters · SolarEdge SE3K–SE10K (three-phase inverter with power optimizers, SetApp)
Error 3xAPhase is unbalanced.
Name in the manufacturer's documentation (fault list): Phase is unbalanced.
[1]
In plain words (editorial)
The phases are unbalanced. The manual's remedy is a setting: Power Control → Phase Balance → Disable.
When to call a service technician: Ask your installer to change the setting.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Steps given by the manufacturer (source text)
- Select Power Control -> Phase Balance -> Disable[2]
⚠ 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] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 6 official manufacturer document quote verified
3xA Phase is unbalanced.
- [2] SolarEdge Inverters Error Codes and Troubleshooting – User Guide (Version 1.2, 2026-09) (se-inverter-installation-guide-error-codes (v1.2)) , p. 6 official manufacturer document quote verified
Select Power Control -> Phase Balance -> Disable