Re: US vs Trojan

["David G. Hawkins" <thehawkeye@earthlink.net>]

Hello Nawaz and All,

>Date: Wed, 27 Sep 2000 12:32:57 -0700
>From: Nawaz Qureshi <nqureshi@usbattery.com>
>My recent cycle life test completed on US2200  showed a cycle life of 934
>cycles to 50% of the rated capacity (100% discharge @75 Amperes). Trojans
>T105's go about 530  cycles with the exception of one time in 1987 when they
>went about 740 cycles under the exact same cycling method. They have been
>claiming that since then. Trojan claims a weight of 62 lb but actually weigh
>59 lb. US2200 weighs 63 lb. Check for yourself. No one can dispute this fact.
>They have also thinned down battery components inside (straps etc.) to reduce
>costs. There is much more but when they hear these truths like these, they
>make a bee line their attorney.
>
>I will be happy to fax you the recent actual cycle life testing curve if you
>send me your fax number off the list.
>
>Sincerely
>
>Nawaz Qureshi
<snip>

When I read this post, I grabbed a catalog from a Trojan battery supplier
that sells them for use with photovoltaic panels in residential
applications.

They sell the L-16 and T-125 models, and show 754 life cycles for Trojan,
477 for Exide, and 452 for US, using a test conducted per BCI test
procedures.

Unfortunately, it doesn't say who performed the test, when, or on what
battery models, but I'm assuming it was from Trojan.

Was your test done per the "BCI test procedure", and if not, can you
explain the BCI procedure?

Do you have data for 80% rated capacity?

Also, do you have a .PDF or .JPG file of your testing that you can e-mail
to me, so that I can share it with our local EV group?

Thanks for your time,
Dave Hawkins
Lyons, CO
thehawkeye@earthlink.net
1979 Mazda RX-7 EV (Back to 144V of flooded cells, but wants the YT's back!)
1989 Chevy S10 Ext. Cab (conversion in progress and taking too long!)