I've used 12 of Jamie's 2V cells in several 24V systems and 6 in a 12V system so far. A bit too soon to tell if they will give much better longevity than 12 6Vs in a series parallel configuration, but I'm convinced that series-parallel is nowhere near as desirable as one series string. Over the years, I've had pretty good luck with 2 parallel strings and moderate to good longevity with 3 parallel strings, but under NO circumstances would I ever install more parallel strings than that. Really bad design, IMO. Bob-O
On Dec 3, 2009, at 12:01 PM, James Surrette wrote: Hi Jeff, Not to plug but we (and some other vendors) have 2V L-16's on offer. So you can get 1000AH (C/20) in a series string in this more manageable size. Regards, Jamie James Surrette Surrette Battery Co. Ltd 1 Station Rd. Springhill, NS, CAN B0M 1X0 Direct: 902.597.4027 Fax: 902.597.8447 >>> "Jeff Yago" <jry...@netscape.com> 12/3/2009 1:16 PM >>> Boy, this string on strings and series of strings is starting to string into a very long list of string related emails! We also avoid multiple strings of batteries, but sometimes this is required to get the right combination of system voltage and amp-hour capacity. We also agree that 3 or more strings is not good, and we have seen many cases where one string stays much less charged than the other strings on older systems as terminals corrode and individual battery cell conditions start to go south. However, for safety reasons we install a catastrophic in-line fuse in each separate string that is sized to help prevent a "melt-down" when one string tries to dump into another string that has a failed battery or shorted cell. Not sure how fail-safe this is and would not protect against small amp flows between strings due to battery temperature differences, but feel its better than nothing. I also point out that for remote off-grid installations you sometimes have to use smaller and easier to handle L-16 size batteries, as its hard to pack in several one-ton tray batteries with no roads using a gater, so this means you still need multiple strings of batteries in parallel. Jeff Yago _____________________________________________________________ Netscape. Just the Net You Need. _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org This email and its attachments have been scanned by iConnection E-Mail Firewall for viruses, spam, and malicious content. The information transmitted in this email is intended only for the entity or person to which it is addressed and may contain confidential/privileged material. If you received this in error, please contact the sender and delete the material from any computer. Any review, retransmission, dissemination, or other use of this information by persons or entities other than the intended recipient is strictly prohibited. %^^% _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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