The short answer
Check the inverter-BMS comm cable and battery protocol settings; BMS_Err-Stop can be disabled only if no BMS comms is intended.
Plain explanation
From the Deye manual for the SUN-SG04LP1 hybrid: F58 appears when BMS_Err-Stop is active and inverter-BMS comm fails. Installer checks the comm cable between inverter and battery BMS. The rest of the checklist is below; work through it in order. Installer only: DC and AC work on a live PV system is dangerous, so owners should note the code and call their installer.
Steps from the source
- F58 appears when BMS_Err-Stop is active and inverter-BMS comm fails
- Installer checks the comm cable between inverter and battery BMS
- Check battery protocol/type settings
- If no BMS comm is intended, BMS_Err-Stop can be disabled on the LCD (installer)
Source
Deye SUN-3.6-6K-SG04LP1 Manual V4.0.0, Chart 7-1 Fault information, Chart 7-1 F58www.deyeinverter.com ↗
Where installers ask this
- Deye inverter BMS communication issue (r/solar)
- reddit.com/r/solar/comments/1hwhinr/
- reddit.com/r/Deye/comments/1ul9iq2/
- reddit.com/r/SolarDIY/comments/1b7fz4a/
- reddit.com/r/SolarDIY/comments/1kmnbqf/
General guidance based on the manufacturer's manual or the named source. Always follow the current manual for your exact model and your national code. DC and AC electrical work is for qualified installers only. Not affiliated with or endorsed by any brand named; trademarks belong to their owners.