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[/b]Alternator does for sure take hp. In high school, they had an alternator hooked up to a light bulb, with the alternator being driven by a bicycle. start petaling and turn on the switch, it gets harder, turn it off, nice and easy. But... it wasnt that hard, i could easily keep that light lit and bright.
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Yeah, but I think we can all (even those of us like me that prefer to disagree for the fun of it) that the alternator will have some mechanical draw on the engine. But that doesn't really answer my part of the question.... Yours is an on/off situation. I'm talking about more electrical current vs. less electrical current. In a basic form of the question, would the alternator require more work to turn it if there were two lightbulbs vs. one?

-Chris

Chris Perosi
Isuzu Editor Emeritus
OutdoorWire, Inc.