Sure sounds like you lost a cell... what's the resting voltage of that battery compared to the other three? (-1/6?) db
Dan Brown
Foxfire Energy Corp.
Renewable Energy Systems
(802)-483-2564
www.Foxfire-Energy.com
NABCEP #092907-44
-------- Original Message --------
Subject: [RE-wrenches] Bad Cell
From: "Mark Frye" <[email protected]>
Date: Sun, June 20, 2010 1:12 pm
To: <[email protected]>
On a battery back with 4 - 12v HUP 1690 Ah wired for 48VDC, I went out the other day and "charged" up the bank and give it a fair amount more at an equalizing voltage.I checked the specific gravity pretty much right away with the batteries still warm and bubbling. All cells read about 1.260, except a single cell that appears to have an graivity of 1.000.Is this normal for a single cell in a bank to crap out completely while all the others remain in fairly good condition?The bank is 6 years old and has been equiped with a Watermaster system from day one.I can't believe that I have somehow washed out 3 gallons of electrolyte by overfilling or something.
Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City, CA 95959
(530) 401-8024
www.berkeleysolar.com
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