Interesting, thanks gents.
I was pondering that you could drive any variety of common electric motors/pumps for some purpose.
Electric fan, water pump, maybe oil pump, maybe even A/C.
I'll look into invertors. In any case, all the energy would come from, and be limited to, the high current alternator.
Running an AC motor is VERY frequency dependent without a VFD (expensive) so an inverter is definately the way to go. A battery is likely required to be in the system in order to stabilize the current, but of course that’s already there in an automotive application.