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  #1  
Old 06-21-2007
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Battery size info...

Ive found some batteries for a good price that i want to use, but i cant figure out how many amp hours they are. Ive got a link with the info on them, but i cant figure out how many amp hours it is. It doesnt say outright, but it says 280 minutes at 25amps.

Trojan Battery Company - ProductSpecification
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Old 06-21-2007
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The capacity varies with the discharge rate, which is why they give you twp sample cases:
280 minutes at a 25 amp rate, and 102 minutes at the 56 amp rate.

Read a few columns further and they also show you "5 hr rate AH 120" and "20 Hr Rate AH 150".

Meaning, if you drain the batttery 100%, you can suck 120 amp hours out of it in five hours. But if you don't suck as hard, you can pull 150 amp hours out of it. That's normal for all battery types, to supply more power under lower demand rates.

Remember those are also 100% discharge rates, if you're planning to cycle the batteries to 40-50% depth, cut them down to match.
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Old 06-21-2007
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Hello Sailor is right. But the simple answer to your question is: 150 amp hours.

Deep-cycle batteries are normally sized by the 20-hour discharge rate. In this case, that's 150AH.

Bill
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Old 06-21-2007
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What was the good price ? I couldn't find it on the posted site.
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Old 06-21-2007
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My good price is at a local golf cart shop on 1-yo used batteries. $30 each. I got one that im going to use for now, and might get 2 more in a week or so for the boat. My current battery bank took a total dump on me a week ago, but thats what i get for the PO buying Walmart batteries.
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Sams club carries a good golf cart battery. If I remember correctly it's 225 ah and cost around $65.
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Old 06-21-2007
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For now im just going to use these. The same place can get Trojan T-105's for $100 each, so when i redo the whole boat im going to use 6 of them. For now i just want something cheap that will work. At $30 ea, i cant go too wrong, plus when i do stick the new Trojans in the Pearson, that leaves these batteries for my Hunter and Columbia.
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