battery sulfation [RE-wrenches]

[John Blittersdorf, Cent. VT Solar & Wind]

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Marco,
 
I second the opinion that L16's need a monthly cycle at the minimum.   Of all 
the Y2K grid backup installations I did,  the one that was  religiously 
cycled to 50% once a month has done the best (24 Trojan L16G).   I have had 
numerous failures of others including one with a battery top blowing  off..... 
numerous shorted cells.  This one was properly watered but not  cycled.  I think I 
have replaced all or some cells in about 70% of the Y2K  systems.  Definitely 
more toward the 5 or 6 year life.  8 L16G is at 7  years and at about 25% of 
original capacity... need to upgrade. Having been in  business  9 1/2 years, I 
am still waiting for the best longevity numbers  but don't have many still 
going. My first customer upgraded golf carts at about  5 years and 2nd customer 
with Interstate golf cart batteries is still  going.  Had numerous cell failures 
of L16's in grid tie at 2 to 3 years  when not cycled.
 
John  Blittersdorf
NABCEP Certified Solar PV Installer
Central Vermont Solar  & Wind, Inc.
104 River Street
Rutland, VT  05701

802-747-0577
802-773-0924 fax
802-770-8625 cell
_www.cvsolar.com_ (http://www.cvsolar.com/) 


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