>From a reliability standpoint I would never want to bet the farm on one >string. All it takes is the failure of one cell and the system is useless >until it is replaced. Three strings means a cell failure only reduces >capacity by 33% not 100%. I’ve always thought in off-grid systems it is a >good idea to build in as much redundancy as possible whenever possible. Oh, >and always use a buss bar system with multiple strings, it makes for a far >more stable system with less stress on the batteries.
Tom From: Wayne Irwin Sent: Tuesday, May 31, 2011 11:49 AM To: Wrenches Subject: [RE-wrenches] 24 volt Battery Bank comparison Hello Esteemed Battery Gurus, Which of the following do you believe is the better 24 V battery bank? A) 13 - Rolls 2-YS-31 2430 AH @ 20 HR (one string) or B) 9 - Rolls 8-CS-25P 820 AH @ 20 HR (3 strings of 3) Thank you in advance for your input! Wayne Irwin, EE Director of Engineering Pure Energy Solar International Inc. State Licensed Solar Contractor License # CVC56695 mailto:pureenergyso...@hotmail.com http://pureenergysolar.com 352 377-6527 Office 352 336-3299 Fax 352 316-1637 Cell The content of this message is Pure Energy Solar Confidential. If you are not the intended recipient and have received this message in error, any use or distribution is prohibited. Please notify me immediately by reply e-mail and delete this message from your computer system. Thank you. -------------------------------------------------------------------------------- _______________________________________________ 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 -------------------------------------------------------------------------------- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1375 / Virus Database: 1509/3671 - Release Date: 05/31/11
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