Micro Air

I occasionally run our Truck Camper’s 11kbtu Coleman via 400a/h LFP’s, 2000w P/S pass-thru inverter, concurrent with 660w solar (expandable to 1020w via 3 ground deployable PV’s), but as per your closing point of “4 days in 5yrs” (likely due to latitude?), it’s kinda hard to justify my kinda effort and expense, unless of course you’re like me and love to tinker, in which case I’d likely give you an affirmative answer - lol

I’d opt for the portable genny route..

3 tons