Good day,
I have installed the Victron BVM 712 in a Battery box, and it correctly displayed both battery voltages.
I have since rebuilt the battery box with a LiFePo4 battery and have also installed a Orion DC-DC charger, 2 x Busbars (+ and -), as well as a 60A Trip switch inline with the Main battery Positive cables.
Now the AUX battery is displaying 0.3v.
This is the strange part: The 60A trip switch is installed on a plastic case, splitting the Positive cable from the House Battery (LiFePo4) between the battery and the Postiive Bus bar.
When I touch any one of the + points on the inline Trip switch, the voltage jumps from 0.3 v to 19v, depending on how hard I press, and touch on any metal object.
I have checked my wiring and nothing is earthed as all of my Battery Box is Isolated. No Earth points anywhere. I run separate cables for earth. Even die DC-DC charger is the Isolated type.
I did use the Positive (from the AUX battery) at the + INPUT port of the DC-DC charger as a feed into the 1st ferrule port next to the 'network' port.
What am I missing here?
Thanking you in advance!