Battery Cycle Life Ratings [RE-wrenches]

[Ray Walters]

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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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