Battery disaster

I'll play with it more tomorrow. I evidently know just enough to be dangerous... any more ideas would be listened to...

Pretend like you are fixing this for someone else. Not a joke. The psychology can make a stunning difference in how you rationalize the problem.

There are a bunch of what is called parasitic drains that are always connected to the 12V battery system. These are all 12VDC drains so seeing 24V will most likely do them in. Here's hoping their individual fuses protected them. These are control boards, sensors, AM/FM radios main chassis and controls, microwave control boards, air conditioner control boards, any 12v lights that were on, your slide motor was operated - that is probably toast now, etc etc etc...

This could be a bunch of money needed to get back to normal...

As my drill Sargent would say "Bend over Son"

Or one of those oldie Classic County Music Lyrics song "What Was I Thinking" comes to mind...

Sure would love to know how this is going to turn out... If it was me that did this I can tell you exactly how it would turn out haha...

Hang in there ... Hopefully the 12VDC fuses saved you big time

I would definitely look for the two large value DC FUSES on your 12VDC Distribution Panel that is marked REVERSED POLARITY fuses... They will open up the 12VDC path feeding the 12VDC Distribution Panel. These will be two ATC fuses off to themself

Roy Ken

When I ran it off just one battery the volt meter read correct (12.5v or so). Then while cranking the generator it initially cranked ok then just stopped entiteky, like a fuse had black wn. Now zero volts on meter.

Time for a complete electrical check up at a good RV repair facility.

Hook all batteries up together positive to positive, negative to negative so that you get 12 volts total and let them charge overnight. See how things work in the morning.