Nan,
RVs vary tremendously in how and why they are wired the way they are. Clearly, underpinning what the Inverter powers is dependent on how large the battery-bank ("house" batteries) is (where "large" means amperage capability). What I replied earlier was for a large, Class-A coach. What do you have?
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Robi & Dale ---- Go Navy ----
2016 Winnie TOUR 42'
Tow: '19 Buick Envision
or: '08 Buick Lucerne
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