I have the Aux port wired to my generator battery 12vdc starter battery and it was reading correctly. I ran an update and now the voltage is readin 4.5 V ish. The battery is still reading 12.6v at the smart shunt when I use my voltage meter and is fully charged. I assume the update might have cause it to reset something to an incorrect voltage setting but I can’t find anything. Both main and aux batteries are 12v and I verified wiring per diagram from other posts.
Are the minuses of both batteries connected to a common ground?
Yes they are both grounded to Chassi / Frame of trailer
I will try running a dedicated wire as a temp test to dbl check
but currently I see correct voltage at Aux port to ground with my fluke
You might try disconnecting the aux input and disabling the aux input in the shunt configuration. Then try reinstalling and re enabling. Might also try removing the 12v supply power from the shunt and reconnecting. Maybe a power cycle will reset it.
