The answer to systems not being used is nearly always leave them on float.
However, 2 amps seems a bit high for AGM batteries unless you have some kind
of phantom load.
Equalization for AGM's is different and for a different purpose than with
flooded. The current should be quite a bit less than you would need for a
flooded, since the purpose is not to stir the liquid up but simply to get
all cells in the series up to the same state of charge. AGM's don't usually
need much equalization.
..................................................................................................
Northern Arizona Wind & Sun - Electricity From The Sun Since 1979
Solar Discussion Forum: http://www.wind-sun.com/ForumVB/
..................................................................................................
----- Original Message -----
From: "Peter Parrish" <peter.parr...@calsolareng.com>
To: <re-wrenc...@re-wrenches.org>
Sent: Sunday, January 31, 2010 4:19 PM
Subject: [RE-wrenches] Couple of Qustions about AGM batteries
We have put together a 850 Wdc portable stand-alone PV system. It uses a
Blue Sky 3024DiL charge controller, a pair of SunXtender 250 A-hr AGM
batteries (24 volt configuration), and a Xantrex Prosine 1000 inverter.
We have been using this system for powering "events" and getting some good
marketing from the activities. Everything has worked out well, and the
system is not being used now and probably won't until March or April
sometime.
We have let the system fully charge the batteries through bulk/absorption
and now float. The float conditions are 26.4 V and 2.0 A at a battery
temperature of 21 deg-C.
My first question: is it alright to let the batteries float every day for
the next 6 to 8 weeks, or should I disconnect them from the rest of the
system until we are ready to use the system again?
My second question: since the 3024iL can perform an equalization, is there
a
safe equalization procedure for these AGM batteries?
- 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
peter.parr...@calsolareng.com
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
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