[RE-wrenches] battery cycle life, US Battery

[Ray Walters]

I agree Larry, I don't have as much confidence in the Dekas, but a cycle 
life chart provided by my supplier shows them equal to the T105. IT took 
a mnth to get that chart to me, so who knows where it came from.
I definitely have seen lower life from the Sam's club batteries, but 
again we need some good comparison data to make the case for spending 
more on the Trojans for instance.
As they say in computing: garbage in, garbage out. So if I use bogus 
cycle numbers  (as I apparently did in an earlier post) my life cost 
calculations are equally bad. I've been trying for over a decade to get 
this to a more exact science, obviously we've a ways to go.
So far I trust my Trojan numbers  ( more or less) Deka not so sure, HUPs 
and other big industrial cells seem to be on target, Rolls I'm still 
waiting on, but I think they're making an effort to get us the numbers.
Do you have Johnson controls or interstate numbers? I had some Exide 
numbers ( I recall under 400 cycles for their GC) and those seemed to be 
right, because they definitely didn't last very long.
I know one thing: My customers with HUPs have had zero complaints and 
I've been selling those for almost a decade. On problematic systems that 
we've upgraded, the HUPs cured the problems, and satisfied the 
customers. Will they last 2100 cycles? I'm not sure if I'll last that 
many cycles at this point.

Ray


On 9/17/2011 5:03 PM, Larry Crutcher, Starlight Solar wrote:
> Ray,
> As a battery-only wrench I stock and sell many brands. Not sure where 
> you saw Deka = Trojan but from years of first hand experience, Deka's 
> are not anywhere near Trojan in life cycles. Also, FWIW dealers, if 
> you sell Deka, check the micro date code on the side of the case. I 
> have received pallet loads of 8D and 4D AGM's that were over 1 year 
> old when delivered.
> Just for the fun of it, my opinion is that Johnson Control (JC) is the 
> worst performer. Just have a look at your JC Sam's Club $68 GC2. A 1-3 
> year battery. About the same for the JC Interstate green top GC2.
> Larry
> *From:* Ray Walters <mailto:ray at solarray.com>
> *Sent:* Saturday, September 17, 2011 1:38 PM
> *To:* Allan at positiveenergysolar.com 
> <mailto:Allan at positiveenergysolar.com> ; RE-wrenches 
> <mailto:re-wrenches at lists.re-wrenches.org>
> *Subject:* Re: [RE-wrenches] battery cycle life, US Battery
> Geez, I got that file on a model specific google search. It has a 
> picture of a 4000 series flooded cell to the side, no other labeling, 
> and it matched my cross check in the AEE catalog (1000 cycles at 50% 
> DOD). I can't seem to get to that page within the website.....
> The chart you sent is labeled series 4000, and is labeled 1280 cycles 
> @50% DOD (very definitive, very different). Did both myself and AEE 
> indeed use the wrong data?(I see the AGM tag) I have another s460 spec 
> sheet claiming 1300 cycle 10 year life with no DOD mentioned.....
> Its like shopping for tires or a mattress, you never know what to 
> believe, other than real experience sometimes. I had a horrible time 
> for instance finding cycle data for Deka, and I'm still not sure if 
> what they sent is right (that Deka = Trojan) I had conflicting charts 
> and numbers from Trojan too.....
> Be nice to have an independent test facility and publish some trust 
> worthy comparison data on a level playing field. I based my Rolls info 
> on almost a decade of literature collected from them, not just that 
> one chart.
>
> Awaiting clarification from Rolls, sorry if I used the wrong data
>
> Ray Walters
>
>
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