[RE-wrenches] For Big Bank Off Grid System Connoisseurs

[Mark Frye]

What is the best way to measure cell temp in the situation you describe?
 
Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 <http://www.berkeleysolar.com/> www.berkeleysolar.com  
 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jeff Oldham
Sent: Wednesday, June 23, 2010 9:47 AM
To: re-wrenches at lists.re-wrenches.org
Subject: Re: [RE-wrenches] For Big Bank Off Grid System Connoisseurs


I have several 10 Outback inverter stacks in o-t-g applications and I use
66kW Prime Power gensets for charging. It is common for me to see a total of
25kW of charging w/low battery V although 18kW is about the average. I feel
if the loads dictate 36kW of inverter power and I can charge at 25kW then
supporting charging and loads could be 60kW plus. Most of these are in
tropical environments and controlling battery cell temps has been my biggest
challenge as I try to balance minimized run time/fuel consumption via robust
charge rates and keeping cell temps below 105 F. This is not easy with
diurnal temps about 80F. Generous battery can spacing and big time
ventilation is mandatory in hot climes. 


>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative
SOLutions 

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