Thor Forums

[16ACE27]

Originally Posted by Jimbo56

In mine, I can start the engine and drive it with the use/store switch in store. House batteries don’t charge. Leaving the switch in store position, plugging it into shore power, overrides the use/ store switch and charges all the batteries. So check the use/store switch first.

We’ll see if the OP comes back.

If you say so.

That's not the way Thor wires their Class A MHs. The chassis and house batteries are connected directly together through the BIRD or BIM and some breakers - no path through the house latching relay. The alternator will charge the house batteries but the converter will not charge any batteries if the latching relay/disconnect is open.

How do you think the latching relay is overridden by plugging into SP? Many people have that misconception because of the "indicator" light near or on the USE/STORE switch. That light is only an indication that the house DC buss has 12 VDC power to it, either through the batteries, or by the converter. If the USE/STORE switch is in STORE (latching relay open), no batteries will charge despite the fact that "indicator" light is on.