the BMV 712, BMS 12/200 and Li-Battery is installed in a trailer.
Input (AB) fuse is 15A.
I'm trying to measure the starter battery voltage. The ground is connected through the BMS (AB) and the shunt (secondary input) is connected to the starter battery .
Is this a firmware bug or isn't it possible to measure the voltage across the BMS, because of the diode reverse current protection? Primary battery measuemend is fine.
The discrepancy is exactly 12V (24,4-12,4 = 12V), that looks a bit like a firmware issiue.