I know you wish to fully understand the operation of an alternator, but please don't get yourself confused. The amount of amps drawn from the alternator varies between, say 5amps to its maximum output, depending on what load is connected. For example: battery charge, ignition lights, air conditioner, windscreen wiper and stereo, etc. The regulator is designed to keep the voltage constant, even with varied engine speeds. So the short answer is, no, a fully functioning regulator should not overcharge a battery.




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