Sealed battery choices [RE-wrenches]

[Bob Ellison]

Look into Power Battery. They have design that is supposed to cure some of
the previous problems with gels and AGM batteries. I will be using some of
their single cells but have had such bad experiences with gels that I just
avoid them..

Web site:  www.powerbattery.com
POWER BATTERY CO.INC			
25 McLEAN BLVD.			
PATERSON, NJ 07514 USA			
973-523-8630			
973-523-9553 (FAX)

Hope this helps,
Bob Ellison			 

-----Original Message-----
From: Jeff Lahl [mailto:jefflahl at yahoo.com] 
Sent: Friday, May 19, 2006 3:13 PM
To: RE-wrenches at topica.com
Subject: Sealed battery choices [RE-wrenches]


Hi Wrenches,
  Have recently rejoined the group after a long absence so please excuse if
this is an old, already-covered topic.
   
  We're going to need sealed batteries for several dozen rural health
centers in East Africa and are trying to figure out the best to use.  Up to
now, we've mostly used standard wet batteries so we're on a learning curve
here.  My reading seems to indicate that AGM is more state-of-the art than
gel but I am getting conflicting reports on specific products: for instance
in the 12v 250ah class, I'm hearing that the Deka gel has better cycling
life than the Concorde AGM.  Anyone have alot of experience with either, and
especially with comparing the two?  What kind of life are you seeing under
what DOD?
   
  In a heavier, industrial class, does anyone have favorite sealed
batteries?  I'm aware of Unigy and Absolyte - are there any others to
consider?
   
  Finally, I'm more than a little concerned about a charge controller
failure resulting in overcharging and ruining these $4,000 battery banks in
remote locations.  Has anyone tried integrating a voltage-tripped relay that
would open the charging circuit - as a kind of fail-safe mechanism?
   
  Will appreciate input on any of the above.
  Thanks much,
  Jeff Lahl
  Project Director, Solar Electric Light Fund
   
   

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