I don't have a generator, but when I saw an ad for a Kawasaki 800w inverter for $40 I thought it was worth a shot. Hopefully it would be able to power the fan (2.8 amp on the plate), and maybe run a TV as well. But experiences so far haven't been positive.
I connected the inverter to the car battery using the supplied leads. I used a jumper cable to add the ground lead (why didn't Kawasaki supply one?). Then connected to the gas heater.
Unfortunately the heater doesn't work. Moreover the status lights identify the problem as 'wiring error or high resistance to earth ground'.
I wonder if the car chassis needs to be connected to the house ground. I don't see a ground wire from the gas heater (and the power just comes from a 3 pin grounded cable), but maybe I'm missing something. Would connecting the vehicle ground to the house ground cause any problems? Or perhaps I just need to ground the water heater to the house?