Generators

Cool stuff

https://www.bostools.nl/aggregaten/diesel_silent_aggregaten/134/

1 gold coin buys you a nice silent 5.5 kw diesel generator with some diesel,

(enough for an electric heater, some lightbulbs and a laptop)

diesel has the advantage of being better storable than gasoline aka petrol aka benzine, and you can blend it with vegetable oils.

~ 2 liter per 5.5 kw/h

the model I watched has variable RPM, it adjusts to the workload (disuse)

bigger engines probably get better mileage.