all the electric power needed for an RV?

tubular might be their wording for spiral wound, like Optima ?

a tiny little LP flame produces about 400w of heat energy, used to power a fridge
what i would love to see, is an lp powered heat converter, that takes that little flame and produces electricity to charge batteries and/or power RV systems

the campfire thermo battery chargers for cell phones, only produce fractions of watts