Seems like an adapter like this would work for the Cummins. I have an older Champion 3500 inverter (pre-paralell days!) and i can plug a 30 amp direct. I used it with my previous 3 travel trailers. No idea about your “hot” question...someone else will know.
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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