HI Allan, As to the old batteries, They are worth what it will cost to move, install and remove when they die in short order. To me only worth it for a DYI.
As to the other part of your question. I'd take the GP's any day. Why? no cables to buy/make can replace individual cells if needed. longer warranty smaller installed space, no case needed. and while I can't prove it probably a better battery jay peltz power On Nov 12, 2012, at 1:55 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 > > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
