Solar · Error codes
What is F13 on a Sunsynk inverter?
Short answer
F13 means the working mode changed: the grid type or frequency changed, the battery was set to 'No battery', or older firmware logged a work-mode change. Sunsynk says it normally clears itself; if not, the documented fix is DC and AC switches off for one minute, then on (Sunsynk fault codes document, March 2024, checked 24 September 2026).
Last checked 24 September 2026 · 1 source
In more detail
- Ask whether anyone changed settings in the app.
- Only follow the switch-off sequence if your installer showed you how.
- Deye-branded inverters use the same F13 meaning.
The facts, dated
- 01Sunsynk: 'Generally, this fault will automatically disappear'.
manufacturer · UK · checked 24 September 2026 · hg-technical.herholdts.co.za
Sources
- hg-technical.herholdts.co.za — hg-technical.herholdts.co.za/Technical/02%20Sunsynk/Technical/Fault%20Codes%20Ca…
Last checked: 24 September 2026