I looked at the MOAB blurb in a recent previous thread somewhat carefully. Unbelievably, it appears to have electric heat of the camper with no diesel heating, not even mentioned as an option.
By both observation (I use 2 x 700w Hornet aircraft heaters to keep my camper at ~40F all winter, requires ~ 17-20w per deg F differential) and calculation (Conduction calculated counting walls and also windows and roof vents), at 0F one would need ~1500w to heat my 4.8m (16’) camper to ~70-75F.
That would exhaust a fully charged 20kwh Li battery bank overnight.
This doesn’t even consider domestic hot water.
Solar panels aren’t terribly helpful in winter, when it’s snowing, etc.
Even a modest Webasto or Espar 5kw (17000 btu/h) heater would consume only ~ 1 gal diesel in 24h, heating up to 70-75F in 0F ambient. And on a ~35% duty cycle.
If the thing has a diesel heater, please correct me.
PS: I love solar/induction for cooking, tried my new cooktop crossing Canada recently.