Starting batteries dead

[Fred S.]

2002 Fleetwood Discovery with diesel engine.
My starting batteries are dead. They were new in April after being replaced then. They are apparently not getting charged when setting parked for several months.

[twinboat]

If they charged in the past, check the float voltage of the house batteries. They need to be over 13.4 volts to start charging the chassis battery.
Could be a bad battery temp sensor, part of the inverter/charger.

Or, if you have a Lambert L415 charger next to your isolator, see if the green light is on.

[Fred S.]

I have a freedom combi, it's lights are normal. I am persuing replacing the house batteries. Then if I still Have a charging problem I will have the inverter repaired.