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Justus3


Canada
74 Posts

Posted - 07/24/2008 :  1:39:58 PM  Show Profile Send Justus3 a Private Message  Reply with Quote
My start battery bank consists of two 12 volt deep cell batterries connected in series (- to +) which I believe generates a 24 volt output. Can anyone explain why a start system would be set up this way?

Thanks.

Ron

Rockmeister



USA
307 Posts

Posted - 07/24/2008 :  3:37:13 PM  Show Profile Send Rockmeister a Private Message  Reply with Quote
Hey Ron,

Yes, that will provide a 24v start voltage to the starters. They usually do this to make the starters spin faster with a bit less current.
You can run a 12v DC starter motor on 24v as its a low duty cycle motor.
In most cases, 24v isn't needed though.
Maybe they had a starting problem in the past?

I take it you have a separate house battery?
How do they charge the batteries?

79 28' Mariner twin inboard V-drive.
SW Lake Erie: Maumee Bay & The Islands
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Justus3



Canada
74 Posts

Posted - 07/26/2008 :  1:17:07 PM  Show Profile Send Justus3 a Private Message  Reply with Quote
My main concern was that the double voltage might be hard on the starter so I really appreciate your thoughts.

The house bank consists of three more deep cells. I assume the charger is hooked in to both banks. Five batteries is a lot of weight to carry but the previous owner took the boat up to Desolation Sound regularly so I'm sure he needed the extra capacity.

Ron
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