My one string of 1476 AH IBE 2 V cells went 19 years before retiring them to a neighbor's off grid system, where they are now working.
One string has my vote! Sincerely, Chris Worcester Solar Wind Works NABCEP Certified PV Installer Phone: 530-582-4503 Fax: 530-582-4603 www.solarwindworks.com <http://www.solarwindworks.com/> [email protected] "Proven Energy Solutions" From: [email protected] [mailto:[email protected]] On Behalf Of Brian Mehalic Sent: Tuesday, May 31, 2011 3:25 PM To: RE-wrenches Subject: Re: [RE-wrenches] 24 volt Battery Bank comparison Hi Wayne- While I think a lot of folks will agree that a single string is better for the long term health of the batteries as it results in more even charging, I still like the idea of at least two strings. That way if a single battery fails, that string can be removed and the end-user can at least get by on half of the pack until a replacement can be installed. Brian On Tue, May 31, 2011 at 10:19 PM, James Surrette <[email protected]> wrote: Hi Wayne, I look forward to the input from the wrenches. My recommendation, regardless of the brand, would be for one string. Regards, Jamie >>> Wayne Irwin <[email protected]> 5/31/2011 6:49 PM >>> 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 [email protected] <mailto:[email protected]> http://pureenergysolar.com <http://pureenergysolar.net/> 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. 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: [email protected] 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 -- ======================== Brian Mehalic NABCEP Certified Solar PV InstallerT R031508-59 IREC ISPQ Certified Affiliated Instructor/PV US-0132 PV Curriculum Developer and Instructor Solar Energy International Carbondale, CO 81623 http://www.solarenergy.org
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