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Beau388 · 07-03-2020, 12:29 AM

Quote:

Originally Posted by BlossomStein

Hi Folks.

I have some folks with a 2018 28A with a 450 chassis. One chassis battery, one onboard Onan generator, and one group 31 deep cycle house battery.

Both batteries test good.

All fuses and breakers are good.

The generator charges the house battery at just under 14v.

They use the house battery until it dies, then (of course) they can't start the generator.

Running the engine does NOT charge the house battery or enable the generator to start.

I have not found a battery disconnect switch anywhere and the rental company (yes, a it's a rental and the folks are 800 miles from home... you have NO idea the shape this thing is in) midnight tech support girl said that the RV does not have a battery disconnect switch.

Anybody know of a switch on this model?
Anybody know if the engine is wired to charge the house battery?
Anybody have any other ideas?

Thanks.

I am not a Class C person but from previous post there should be a BIM (battery interconnect module) near the chassis battery. The BIM replaced the old Trombetta module and relay (BIRD) in the house battery compartment.