Victron Energy BMV-712 Smart Battery Monitor With Orion DC DC - Not registering power input

[pwfarnell]

The usual reason for this is that the negatives of the 2 battery banks are connected together, or via the chassis/hull ground. The starter battery negative and/or the chassis/hull ground must go the the system/load side of the shunt.

See https://community.victronenergy.com/t/shunt-battery-monitor-not-reading-the-correct-soc-amps-missing-solar-decreasing-daily-or-other-misreading-problems/87