I’m almost the opposite, I’d swap the caravan out for a motorhome when they finally go full BEV. Imagine the potential of a motorhome with a >100kwh battery which is usable by the cabin space. You could easily fit >1kw of solar on the roof too.
No stinky diesel heater, induction cook tops, running full air on off grid etc.
Unfortunately, I can’t see the caravan industry pulling their head out their behinds any time soon. I mean high end caravans still ship with a 100W solar panel and specced for a led acid battery.
My tiny 2 birth could easily fit 800-1000w of solar on the roof, chuck in 2-4kwh of battery storage and boom, you’ve got 240v off grid, sure not enough to run heating but pretty much everything else you are golden.