I'd say the old batteries are worth at least their recycle value up to
maybe
double that. Might make some one a great set, but then they might be
barely worth the trouble of moving and hooking them up.
I always try and not make too much on something like that, so there's no
hard feelings if they don't last very long.
A solid load capacity test would tell you a lot more about them.
Ray Walters
On 11/12/2012 3:55 PM, Allan Sindelar wrote:
Wrenches:
First question: for a large grid-tied with battery backup system (9.8
kW array, two SB5000s, dual Sunny Islands), we have offered the
customer the choice of either one 48V string of 24 2V Concorde
SunXtender PVX-121HT, for 1,200 A/hr, or a set of Absolyte GP 100G23s,
for 1,260 A/hr (at the 20 hour rate), the closest match. The prices,
surprisingly, are quite close - the Absolytes are a bit less
expensive, given the additional cost of battery enclosures and labor
for the Concordes. I have avoided recommending one or the other on the
basis of battery service life, as we haven't enough experience with
the Absolytes. The question: which of these battery options would you
recommend to the customer, and why?
Second question: Four years ago, well before we got involved, the
customer purchased a 24V set of used Absolyte IIP telecom batteries
and we agreed to incorporate them into this system. I contacted Direct
Power on their behalf to inquire about obtaining a second 24V set of
batteries to add to their set of 3-100A33s to make a 48V bank. I
learned that they have no more of these sets in stock and have no firm
expectation at present of getting any more. I had asked here about
finding a set and about mixing new with old but received no responses.
We will be going with a new set of batteries, either Absolyte or
Concorde. This leaves the old set up for resale. But in the process we
learned via the date codes that the customer's set was eight years old
when he got them, and have been in their possession unused in a barn
since then. See below for the customer's description of them. The
question: what is the expected remaining life of these 12 year old
cells, assuming the best - that they were left fully charged and in
float for eight years and seldom if ever cycled? What might they be
worth today, if anything?
Thank you,
Allan
-------- Original Message --------
Hi Allan,
Here is that note regarding batteries. I have 4 Absolyte batteries
manufactured in 2000, model # 589 508 kkc 7667,7668,7670,7674. They
have been used for back up in the telecommunication field. I have
owned them since 2008 and they have been float-charged on a monthly
basis to keep them topped-up. I think their condition is good---
although I have not load-tested them. They were purchased for a
project that is no longer in play and so I would like to pass them along.
Ted
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