Battery volts drop - Club Cobra

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#10 (permalink)

03-21-2016, 05:11 PM

DWRAT

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Join Date: Aug 2009

Location: Phoenix, AZ

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Posts: 1,956

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Quote:

Originally Posted by allcarfan

hate to rehash this thread, but it seemed appropriate. is this voltage drop normal?

I have a 140amp powermaster alternator in my new back draft vehicle. all grounds and power leads are good. I get 14.66volts at my battery. I flick on my heater and the volts drop to about 13.4. Turn on electric fans, lights, etc, and I drop to about 12.

I'm guessing your testing at idle, try it around 2,000 rpms.

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