[RE-wrenches] Surrette AGM's

[Jason Szumlanski]

If it's "survival mode" only, why do you need 1,200 cycles?! How many
hurricanes/tornados/riots are you getting around there? :)

The S-460 is a great battery, but it's rated for 1200 cycles to 50%. I
don't have a cycle curve handy, but you can probably expect about half
the cycles at 80% DOD. 

Based on the price, it looks like you are talking about 8 of the S-460's
for 350aH @ 48V. Maybe go to 8 of the Concorde PVX-2580L and use a 50%
DOD factor instead. I'm not sure how that compares to the GNB price for
the same capacity. That also gives you the option for occasional deep
discharges to 80% DOD. The point is, it might be cheaper to increase
capacity and decrease DOD than to buy a "higher quality" battery that
can handle more cycles to 80% DOD. 

Jason Szumlanski
Fafco Solar
Cape Coral, FL
www.FafcoSolar.com

----------------------
Date: Thu, 16 Sep 2010 11:28:39 -0500
From: <holtek at sbcglobal.net>
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Subject: [RE-wrenches] Surrette AGM's
Message-ID: <8F9976AE8B824FD3BA899E857C202272 at HoltPC>
Content-Type: text/plain; charset="iso-8859-1"

Getting a few "survival mode" system requests...and of course they want
"no maintenance" battery bank.....I have to smile when I see them flop
around on the floor when I show them the GNB Absolyte
pricing......Surrette's ain't that much cheaper (about $2000 in this
case).... any one out there spec'd the S-460-AGM that can give me some
feedback?...looking for GNB- like performance (1200 cycles @ 80%dod
tested) for just a bit less money (or am I just imagining those are
oinking noises coming from above?)

Holt E. Kelly
Holtek Fireplace & Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com