Hi Mr Wizard,
I did heat electrically without shore power when I was not full time. Now that I am I can't do more than 2 nights--and in the extreme cold of -20 I can only do one. Shore power or generator would be a must do, but it is far cheaper to go to a campground--or at least to somewhere that I have twin 15 amp shore power outlets I can hook up to.
I can heat from the chassis when in motion by moving the air with fans.
MrWizard wrote:
And do use the generator at mealtime, and more depending on weather
Piano... has less solar, uses electric heating, and hardly ever uses his generator