Twelvebears

I know this is an old thread now but it’s reassuring to know that I’m not alone in being frustrated by Deye/Sunsynk inverter to battery comms. In my case the BMS is sending a 56.1v charging voltage until the pack resets to 100% at which point it falls back to the PackFull voltage of 55.2v As far as I can tell, the 56.1v is hardcoded to the Sunsynk specific firmware because a) it doesn’t align to any Pack Voltage setting on the BMS (or x16 any Cell Voltage setting either) and b) this is (by amazing coincidence) the specific charge voltage stated on the specs label on the batteries themselves. I my case this hard coded 56.1v is still a relatively modest 3.5v per cell but it’s still irritating to not be able to control the charge voltage correctly and to allow absorption at 55.2v as I would prefer.