...IMHO:...A larger diesel generator is 120/220vac up to 100 amps [about $ 3500] and a smaller gasoline and/or propane generator [$1000] is 120vac also have a good battery charger [$150]that you plug into the small or large generator for 12vdc coach electricity/battery charging etc.......then you are covered all the way around charging the coach batteries/running in the nite to keep cool/warm-running 120/220 vac appliances anytime any place under any conditions and last but the most important your battery charger will charge the truck batteries/the house batteries and will run the 12vdc things very well....cheaper and more reliable... forget the transfer switches and any of that gizmo crap....use plugs and recepticals and there won't be any mistakes and that flash/jolt when you cross things won't happen. The unites will cover for each other-also cross over to take over electrical things under any circumstances....which is a miracle when things go badly these days.....geofkaye
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