Battery Cycle Life Ratings [RE-wrenches]

Matt Tritt solarone at charter.net
Sun Oct 31 23:08:52 PST 2004


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  HC's are notorius for being short-lived. The standard L-16 is way better 
for longevity and should be as least as good as a T-105. After all, it has 
more lead.

  Matt T
  ----- Original Message ----- 
  From: "Drake Chamberlin" <solar at ecoisp.com>
  To: <RE-wrenches at topica.com>
  Sent: Sunday, October 31, 2004 7:31 PM
  Subject: Re: Battery Cycle Life Ratings [RE-wrenches]




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  One bank was, and one was not.

  At 06:55 PM 10/31/2004 -0800, you wrote:

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  >
  >  Drake,
  >
  >  These must have been Trojan HCs, right?
  >
  >  Matt T
  >  ----- Original Message -----  From: "Drake Chamberlin" 
<solar at ecoisp.com>
  >  To: <RE-wrenches at topica.com>
  >  Sent: Sunday, October 31, 2004 3:31 PM
  >  Subject: Re: Battery Cycle Life Ratings [RE-wrenches]
  >
  >
  >
  >
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  >  At 12:01 PM 10/31/2004 -0800, you wrote:
  >  >
  >  >
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  >  >
  >  >Drake,
  >  >
  >  >What kind of cycle DOD do your customers put these cells through? I am 
very
  >  >curious why my experience would be so radically different from yours.
  >
  >  Two recent systems that I serviced with dead L 16s were Y2K systems 
that
  >  were not really used,
  >
  >  One person did cycle his down once a month.  I believe he went down 50% 
of
  >  the theoretical amp hours.
  >
  >  I think that is both cases, an individual battery would go bad in the
  >  series sets and then take the rest with it.  If closer track of the
  >  batteries were kept, likely a majority of the bank would have lasted 
longer
  >  by replacing a few batteries.   In one case we tried to revive the bank
  >  with EDTA.  It did bring over half the batteries up to barely usable.
  >
  >  >One negative of smaller amp hour batteries means more paralleled 
series
  >  >strings,
  >  >which can also lead to difficulties.
  >
  >  True.  I have used bus bars, which might be the answer.  Bigger 
batteries
  >  for big banks is certainly the way to go.
  >
  >  Drake
  >
  >
  >  >Todd
  >  >
  >  >
  >  >
  >  >Drake Chamberlin wrote:
  >  >
  >  > > My experience supports the superiority of golf cart batteries. 
The T-
  >  > > 105s and T-125s seem to be much better than the L -16s.  The  10
  > year rated
  >  > > L -16s, in my experience seldom last longer than 5 years, while 
many
  > of the
  >  > > 5 year rated T - 105s and 125s go close to 10 years.
  >  > >
  >  > > I don't recommend L - 16s to customers any more.  I've gone to the
  > Surrette
  >  > > line.
  >  > >
  >  > > -Drake
  >  >
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