I mean there’s Welding setups that can be run off a car, but those require a lot of modification.

Most likely that persons minivan isn’t capable of more than 240W, but the engine would certainly capable of running a kettle. It just needs a bigger alternator/generator on it.

And the cars battery could also provide enough amps for a beefy inverter, at least for a while.

Who knows, maybe it was modified?