My MH has VDO gauge, it is reading just a little over 11 volt while running , today i started my coach and the battery read 11.7 volts, once i started the engine it dropped to 11.4 , i started the gen...
I have an OBDII gauge and monitor my charging voltage continuously while on the road. When my alternator is charging properly, the output is just over 14 volts. On my coach there is an electronic circuit that directs the alternator charging current to the house or chassis batteries as needed.