you have to disable the total voltage overvoltage protection switch and set the overvoltage in Harging overvoltage protection
and disable this Intermittent charging function, this crap will lock the charging on high soc.
men this bms is so bad translated i have some problems with my sunny island
my soc also dont set to 100%
sometimes it will but sometimes not, most of the time it sits on 98,3% for hours sometimes for minutes
i have recalibratetd the shunt, omg this was a mess
got a steady -25 a measured load then pressed calibrate and the bms calibrated to -29a next try it calibrated to -33a
then i got a lower load and it finaly calibrated spot on after many times i had just luck.
guys dont touch this damn calibrate buttons it will ruin your bms