Thanks Gary.
Coming from the sailboat world, I'm used to converters with dual outputs - house and engine. The manuals I got from the PO were missing a couple pages of schematics - like the ones I need...
While this still seems odd... I guess it's "normal" in the Land Yacht world...
Kind of like ventilation fans with roof framing support on only two sides...
I like your solution. When I'm working on the RV, I usually have the radio blasting away - which is fed from the engine battery. .Guess I'll add another charger short term, and when I get to electric projects make sure I get a converter (or inverter with built in charger) with a dual output.