If the EV can turn a generator (or alternator) to charge the battery up as it goes, the car should be able to go forever, right? Or, at the very least, it should go further, shouldn't it?
. What turns the alternator? A belt driven by the rear wheel. We don’t know for sure why they did this, as there could be some good reason we can’t think of, but it sure looks like they were trying to make a perpetual motion machine.
The problem? You just can’t get something for nothing. The laws of physics keep you from being able to do it. When a machine gets energy from somewhere, it can’t run forever without getting more energy to keep it resisting things like friction and the work you’re trying to get the machine to do. To my shock and dismay , I found that the charger for the power station was drawing 125 watts from the power station, but only putting 118 watts back in! Shouldn’t it be putting in at least what it took out?
Every time the power is converted or changed in any way, some of it is lost as heat energy, or waste heat. I’m surprised that this whole circle of stacking inefficiencies only wasted 7 watts, to be honest. The display is probably not factoring in all that was lost in this transaction.
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