Hi, I'm having an issue with the BMV-712 Smart reading approx. 50% charge current, when compared to a (known good) clamp meter reading.
See my (very rough - sorry) schematic. The BMV is reading around 4 amps when the mains charger is on and the aux batts being charged via the Orion 12/12-30, but if I put my clamp meter on the +ve output cable between the Orion and the Aux +ve bus bar, I get around 8 amps.
I know there are couple of "unconventional" methods of connection, but, in theory, these shouldn't make a difference to the way the BMV shunt reads the -ve loads. Unless I've missed something, all -ve connections, in around about way, pass through the shunt, with one exception: my winch -ve connection is excluded from the shunt, this is done deliberately to avoid high winch currents passing through the shunt and possibly overloading it.
What am I missing? What have I done wrong. Many thanks in advance for any help.