Battery Cycle Life Ratings [RE-wrenches]

[Matt Tritt]

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  Ray,

  Actually, I have it on good authority that the HC ACTUALLY has 25 to 30 % 
lower cycle life than the standard L-16. Kind of sucks, don't it?

  The reeason for this outrage is that they packed so much lead and 
seperator material into the L-16 case that there isn't sufficient room left 
for the acid. The result is that the plates crap-out from acid starvation.

  On the other hand - as if it helps us - these things are actually made for 
floor scrubbers, in which application they do a very nice job.

  Matt T
  ----- Original Message ----- 
  From: "Ray Walters" <ray at solarray.com>
  To: <RE-wrenches at topica.com>
  Sent: Tuesday, November 02, 2004 10:34 AM
  Subject: Re: Battery Cycle Life Ratings [RE-wrenches]




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  Hi Bruce;

  That's backwards from what my info says. I have both cycle life charts and
  old brochures for both the T105 and the L16. I'd be curious which 
brochures
  you have, and what the latest word from Trojan is. Also, where did the 
info
  stating that L16HC is 20% less cycle life than the regular L16 come from. 
I
  would have not sold the HC, if I had known that. Once again this list is
  probably one of the best info resources on the planet.

  Ray

  At 01:34 AM 11/2/2004, you wrote:
  >
  >
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  >My (older) Trojan brochure states T105 500-600 cycles to 80% DOD.  L16
  >600-700 cycles.  The traction cells I use (Exide) are rated at 1500 
cycles
  >to 80% and practical field experience tends to bear this out.
  >
  >I guess part of the problem is cycle life and DOD are non-linear so the 
10%
  >or so most solar batteries would be subjected to can be difficult to 
compare
  >to the heavier cycle figures.
  >
  >Ambient temperature also has a big influence and this may be where some 
of
  >you guys are getting widely varying results from the same batteries.
  >
  >At the end of the day it comes down to lead.  The more of it per Ah, the
  >longer the battery life.
  >
  >Bruce Geddes
  >PowerOn
  >
  >----- Original Message -----
  >From: "Ray Walters" <ray at solarray.com>
  >To: <RE-wrenches at topica.com>
  >Sent: Tuesday, November 02, 2004 9:32 AM
  >Subject: Re: Battery Cycle Life Ratings [RE-wrenches]
  >
  >
  >
  >The numbers from my Trojan brochures are T105 750 cycles to 100%DOD. L16
  >(from chart) is about 600 cycles. My supplier claims no difference in 
cycle
  >life between the L16 and the L16HC. I'm skeptical.
  >
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  Ray Walters
  ray at solarray.com
  President, SolarRay, Inc.
  NABCEP Certified Solar PV Installer
  BS Mechanical Engineering, UT Austin 88
  Returned US Peace Corps Volunteer

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