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post #8 of Old 10-04-2012
chef2sail
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Re: HO Alternator & Serpentine Pulley Kit Install

Great article and explanation.

We outfitted Haleakula with an
80 amp Electromax.largest which would fit in the engine space..no serpentine though. The bulk charge at idle or low rpm is over 60 amps vrs the old Hitachi -25, or a Bamar 600 series -40. We rarely allow our bank of 720 ah under 450 ( roughly 5days without engine) . At running speed 2700 rpm the eMaax puts out 83 amps at 77 degrees. We can get back to 80% (575) usually in 1.5 hours of motoring. Have noticed that the alternator also runs 30 degrees cooler than previous Hitachi. Love it's dual fans. I knows it's somewhat undersized so we are getting at least one large photo cell to help. We spend enough time at dock keeping them topped off too.

I got the electromax at MS recommendation and have been very happy with it.


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