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Old 10-19-2010
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Battery Charger

I have a 1984 C30 with two battery's and would like to add a permanent charger to the boat while at the marina. If I have a TV,DVD,lights ect ect going at the same time what size would it take to keep the battery's charged. The boat has shore power with ac outlets but no converter or would a converter be better. If anyone could offer some help it would be greatly appreciated.
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What size are your batteries. You should generally size a battery charger to suit the batteries you've got. Too large a charger and you're likely to fry the batteries more easily. Too small a charger and it'll take a long time to fully charge them, if ever.

IOTA makes a pretty decent charger with a three-stage regulator and are far more economical than a lot of the other brands.
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Sailingdog I will have to get to the boat and look at the size. I can get my hands on a ProMariner Pro 1000 it is a 10 amp 2 bank 3- stage charger but I did not know if it would do the job for what I wanted.
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Usually, if you have wet cell batteries, you want a charger sized to about 20-25% of the battery bank 20-hour amp-hour rating. So, if you had a battery bank of two 6 VDC T105 golf-cart batteries, you'd want a 45-50 amp charger, since the bank would be rated at 225 amp-hours. A 10 amp charger is really a bit small for most applications. It'd be a good maintenance charger, but that's about it.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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