The energy to spin a generator (and alternators) is horsepower. If generators produced electricity without any effort, we could have tiny steam engines turning the powerstation's big generators. The electricity is made by draging magnetic lines of force through a coil of wire. This takes mechanical energy. That comes from the shaft going in, that trys to slow the shaft, that slows (your) wheel. What if there were dragging brakes on the trailer you discussed in your remarks above! Would your milage remain the same? No it would be reduced by the amount of (heat) energy being wasted. The same applies to the generator hooked to the fifth wheel. It drags on the axle, taking power from the pull vehicle. All of the methods of making electricity (or any source of power) comes from the conversion of other sources. An alternator of high efficiency might make 60% of its output in electricity and the remainder in heat and bearing friction (heat). Wild, I hope this explains why people are reacting to your idea in the way they are. with respect, Jim
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