Deka vs. Absolyte Batteries [RE-wrenches]

[Joel Davidson]

Concorde makes a nice battery. Has anyone with a PV system ever had a problem
with Concorde batteries? If so, what?

"Jeffery Wolfe, Global Resource Options" wrote:

> Jeff,
>
> We seem to have had good success with the Concorde batteries. Pricey, but in
> the one off-grid case where we beat them up REALLY hard, most of them have
> come back into good shape. (Drastically over discharged several times, now
> in a good charging regime.) In our other applications, all on grid, we've
> had no problems, but no good quantitative data to report either.
>
> I'm sticking with the Concorde just because my "feeling" is they are
> performing well.
>
> 2 cents for what it's worth.
>
> Jeff
>
> -----Original Message-----
> From: Jeff Yago [mailto:jryago at earthlink.net]
> Sent: Monday, February 10, 2003 4:02 PM
> To: RE-wrenches at topica.com
> Subject: RE: Deka vs. Absolyte Batteries [RE-wrenches]
>
> Several weeks ago I had a post explaining that we were ready to order
> a replacement battery bank for a total off grid solar home (no
> generator and no grid) having a 4.8 kW array.
>
> Brad Bassett and Dan Duffield we kind enough to reply, but we still
> have some concerns on which sealed battery to purchase.  The owner is
> disabled, and wanted a zero maintenance battery, which was leading us
> to a Gel or AGM type stacked battery, at 1,500 amp-hr @ 48 volt.
>
> Several responses indicated that both would be very good for a "float"
> standby application, but on a daily cycling application, some battery
> brands stand out.  Based on a known history of loads, the above
> battery size should help to keep the daily discharge to about 30% on
> average, which should improve battery life.
>
> Several wrenches have indicated that the Deka Unigy II is a lower cost
> choice, but may have a positive plate growth problem in a daily
> charge/discharge application, and suggested that the GNB Absolyte or
> C&D HD series might provide better life.  I read a study that
> indicated the GNB Absolyte had a very low discharge rate for extended
> storage, but that really does not apply here and this is not a "float"
> application.
>
> The main reason we were strongly considering the Daka Unigy II, was
> because they have a large distribution center within 20 miles which
> saves on shipping and handling costs (they can ship direct to job site
> and unload for us!), but I do not want to have an early battery bank
> failure because we tried to save the client a few dollars.
>
> Any final thoughts and past experience would be appreciated.
>
> Jeff Yago
>
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