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Some ideas
I thought about it myself and here are my thoughts.
1) Engine in car - if you use an inverter hook to the battery then you will only get about 1KW max from the inverter. Assuming you get a heavy alternator which put out 100A. It is still quite good and just leave the car in idle or rev it up a bit.
2) Engine out of car - You can hook a generator head to it. Rev the engine to 3600rpm, I think most head take 3600rpm. Head is around $300 from Harbor Freight. This will give you may be 5KW or more, enough to run a whole house.
3) Run the coolant to a heat exchanger to heat your hot water or radiator in the house. It is possible but may be messy and need some inventiveness. Never thought of this.
4) Sync the power from the generator head back to the grid to feed surplus electricity to the operator. It is doable and you can sync it manually but it is dangerous and a try and error process. The electricity company may not let you do it. An automatic phase synchronizer is out of the questions. It is very expensive and not within the realm of a DIY.
I think in general it is doable for off grid use. An inverter is the best, and heat your hot water. Any members have other ideas?
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