Quote Originally Posted by Wallythacker View Post
I I would like to add, if the alternator has to work harder because of the slower speed it turns has anyone calculated the reverse EMF generated by the reduced speed? The alternator is behaving like a brake the more current it provides. Nothing is free.
I'm not sure reverse (or counter-) EMF applies here but I'm pretty sure that the voltage regulator controls how much work the alternator does no matter how fast or slow it spins.