Why can an electric car, not have a generator instead of a motor on one wheel, so that as that wheel turns it generates energy for the battery? I totally understand that it isn’t possible, but I don’t know why. I also understand that regenerative energy is taken from breaking.
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Actually, there are electric cars where turning the wheels generates electricity: The Rivian trucks can be towed and load the batteries while being towed.
But there will always be more nergy necessary to move the vehicle with the motor than can be gained by moving the vehicle from the outside, generating electric energy. A perpetuum mobile (generate a little more electricity than you get from a generator moved by the same car) is not possible..
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