[RE-wrenches] 24 volt Battery Bank comparison

[Darryl Thayer]

first I am confused 12 each at 2 volts is 24 volts,  also I always like one string over two, I have experianced a battery fire with 4 strings in parallel.   



________________________________
From: Brian Mehalic <brian at solarenergy.org>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Tuesday, May 31, 2011 5:24 PM
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 <james at surrette.com> 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 <wayne at pureenergysolar.com> 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 
>Wayne at 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: RE-wrenches at 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
>
>
>


-- 
========================
Brian Mehalic 
NABCEP Certified Solar PV Installer™ 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

_______________________________________________
List sponsored by Home Power magazine

List Address: RE-wrenches at 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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20110531/8c31361e/attachment-0004.html>