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Well I agree, free always wins in my book. Plus, as long as you're just commuting, range doesn't really sound like an issue.
Just for argument's sake though, did you figure 10kw with the current weight of the car, or without the batteries? Because if you size it to run the car indefinitely, then you wouldn't need hundreds of pounds of batteries, and without that extra weight it seems like you could get away with something smaller. Even a generator that replaced only half of the energy lost would pretty much double your range? Or am I missing something... Just wondering for my own curiosity.
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