[RE-wrenches] 24 volt Battery Bank comparison

[Bob-O Schultze]

Wayne,
First, let's hope you mean 12 of the 2YS31. A single battery string is always preferable to multiple strings in my book. The only downside is interconnect cables the same size as your inverter cables. That probably means 4/0 CU for most 24V, 3KW and up inverters. Two strings in parallel-not too bad. Three strings- as far as you want to push it. More strings- Don't go there.
Bob-O

On May 31, 2011, at 2:49 PM, Wayne Irwin wrote:

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.com 
352 377-6527 Office
352 336-3299 Fax
352 316-1637 Cell
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