Hello.
I have a BMV-712 installed in the house battery on my boat and it measures load well, however, it is not measuring charge from the two engines alternators. Here is the current diagram.
I believe that the issue is that the negative of the alternators are connected directly to the start batteries and no way for the shunt to see what goes "in" into the battery. Correct?
What would be the best way to correct this? Move the negative jumper that connects Start Battery 2 to House Battery to the Negative load side of the shunt? Any implications on doing this that might damage the system?
The shunt measures the charge when connected to the on-shore charger since the negative lead of the charger is connected to the load side of the shunt.