hmmm well then I'd check your converter's charging lead going to the battery. Check it for a loose ground or check the box to make sure the wire is still screwed down to the unit. They use 8 AGW and sometimes that thick of wire feels like it's screwed in but it's not. Do you smell anything burnt when you are down there.
2007 20BH Jayco JayFlight
2009 F150 5.4L SCrew Cab XLT