The dual 3000W inverters is a clue. Some high-end coaches like your Sig have the capability, but it is mainly for traveling down the road where the batteries are being charged from the alternator. None of them can sustain for any reasonable amount of time while parked. Not even with 16 batteries of their equivalent.
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Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Lifeline AGM's
2019 F250 King Ranch 4x4 Powerstroke - SOLD
2022 F350 DRW King Ranch 4 x 4
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