[RE-wrenches] Fully discharged AGM battery

[Maverick Brown [Maverick Solar]]

Concorde's Technical Manual describes a low discharge recovery process.
 
http://www.sunxtender.com/pdfs/Sun_Xtender_Battery_Technical_Manual.pdf
 
See section 5.6. The jist of which is to blast them with voltage, etc.
Please see the details. I have done this once and it works fairly well to
fix the battery. Use a charge controller where you can program Absorb and a
few PV modules.
 
Good Luck!
 
Maverick
 
 
Maverick Brown
BSEET, NABCEP Certified Solar PV Installer R # 091209-26
President & CEO
Maverick Solar Enterprises, Inc.

Corporate:  <http://www.mavericksolarenterprises.com/>
http://www.mavericksolarenterprises.com
 
 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Peter
Parrish
Sent: Thursday, April 21, 2011 4:51 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Fully discharged AGM battery


I have a client who fully discharged a pair of SunXtender PVX3050T 6V
batteries. They were about one year old. They had no load voltages of 1.77
and 0.87 V respectively. I have ordered him a new pair but I wondered if
they could be resuscitated to some degree and be used for some odd purpose
around the shop.
 
I tried to charge them using a Vector VEC1095A charger on the AGM setting:
they took about 7.5 A at 14.4 V for about 5 minutes and then shut down. I am
now desulphating them, which I think takes the better part of a day. And I
then plan to run them through another charge cycle
 
Is there any thing else that I can do to get them in some sort of
serviceable shape?
 
- Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
 <mailto:peter.parrish at calsolareng.com> peter.parrish at calsolareng.com  
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885

 
 
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