Kinda a loaded question with a lot of variables. In electric it draws 1640 watts, kinda the same as 1 oil filled portable heater on electric. If the temp dips into the 30's, it is going to want to kick the diesel to keep 50 degrees.
If you have true 50amp shore, I would put 2 electric oil filled radiators in the coach, and one in the the basement. On their thermostats. That is 3 times the 1640 watts of energy of the one rig unit.
Then set the diesel aqua hot as the backstop @ 40 degrees, in case the power goes out. Set Propane furnace to 38 degrees and let them fight it out.
That would buy the longest amount of time, using every resource the rig has.
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2006 Fleetwood Bounder 35E Trek pure Trike, electric, 50 mile range, 7000 ,miles the get everything runner. To be toad list Done, Ford E450 toad. Stay & Play active brakes.
Full-time since 2018. LG 4.5 cu ft washer/dryer.
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