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Title: Discount/wholesale batteries Post by: dguy on October 08, 2009, 09:59:58 am Does anyone know where 12v deep cycle batteries can be had at sub-retail prices?
I'm looking for a sealed 12v 100aH (deep cycle) battery. Vented batteries which meet this spec are easy to find and can generally be purchased for $100ea or less; as soon as the word "sealed" enters the conversation however, the price triples. ::) :( Title: Re: Discount/wholesale batteries Post by: aaron88 on October 10, 2009, 12:29:42 am Have you tried Total Battery or Canadian Battery?
100 Amp Hour is a big battery. How many are you looking for? Aaron . Title: Re: Discount/wholesale batteries Post by: dguy on October 11, 2009, 09:12:13 am Total Battery has what I'm looking for, to the tune of about $350ea taxes-in.
These things are typically used as storage batteries for residential wind & solar rigs, but I'm looking for one to use as the source for a UPS for our pellet stove. I explored hitting Princess Auto's surplus section and running a number of 3-5aH batteries in parallel, but there are no gains as far as cost goes, and space rapidly becomes a problem. Title: Re: Discount/wholesale batteries Post by: aaron88 on October 12, 2009, 01:29:12 am There are very specific limitation as to charge and discharge cycles on a lead-acid (or like) battery. Basically you should never discharge a 12V battery passed 10.5V (or it will never recover fully). So what are your amp-hour calculations based on? Typically you only get about 2/3 of the rated capacity of a battery before you damage it.
Also you can get 3 to 10 times the charge cycles out battery if you never discharge passed half. Aaron . Title: Re: Discount/wholesale batteries Post by: dguy on October 12, 2009, 08:18:56 am The UPS manages the charge/discharge cycle, which given the manufacturer's reputation and the battery life I've experienced with other UPSs of this brand, I suspect is handled reasonably well. The user manual for the thing doesn't go in to specifics, and they do not appear to supply this information online either.
I made no amp-hour calculations; simply selected the battery capacity based on what appears to be a commonly available deep-cycle battery intended for indoor use. It's easy to cut the price by a 1/2 to 1/3 if a non-sealed battery would do. Marine deep cycle batteries are a dime-a-dozen by comparison. I'm not willing to take a chance on electrolyte vapor or hydrogen being vented in to the room however. Title: Re: Discount/wholesale batteries Post by: aaron88 on October 15, 2009, 12:22:22 am Wear a mask :P
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