I have 2 deep cycle coach batteries and they are able to keep the heater up and still have enough to start generator in the morning. Only one morning did the frig say low DC, but that was just while heater was running, and voltage came back up once heater went off.
I just got back from Albuquerque to Cincinnati and back trip for Thanksgiving, it was mid-high 20's many nights. Burned through propane on many evenings, as several overnight stops without any electric.
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2005 Kenworth Showhauler 45 ft total length
twin screw, 450 hp ISX, 10 speed Ultrashift
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