My set up is 2 Battleborn Lithium batteries connected in parallel for 200 ah @ 12vdc. Victron Solar Charge Controller 100/50, Victron MultiPlus 3000 ah /12v, Color Display and a Victron BMV-712 battery monitor. This setup is in my 5th wheel RV.
The issue is that the BVM-712 appears to indicate a much higher current discharge while just about everything is turned off. While it is sitting there with everything off the draw is about 2 amps. After 3 days the battery monitor is saying that the battery bank is down to about 50%.
At this point the battery voltage is down from 14.7 to 13.37 volts. On a Battleborn chart it shows that to be about 95% full.
Suspecting an inaccurate reading I disconnected the cable from the negative terminal of the battery to the shunt. I measured the current between the end of the cable and the shunt where it would normally connect. It was 0.37 amps.
I double checked the shunt by removing it and turning it over. It said 500 amps 50 mv which is what my meter is set for.
I know the meter is supposed to be very accurate. Am I doing something wrong?
