<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Ron,<div><br></div><div>I had a similar experience. </div><div>Customer had a similar battery, industrial, 1200 amp hrs at 48v, IBE that sat for a few years.</div><div><br></div><div>I hooked them up to a dual stack outback, and just turned it on. The voltage was brought up with some solar and then we ran the generator for a few days straight. </div><div>Amazingly they did come back to life.</div><div>He did get about 3 years before they did die for real.</div><div><br></div><div>You won't need a lot of current, they won't take it, at least initially ( if they react anything like sulfated batteries I've dealt with)</div><div><br></div><div>jay</div><div>peltz power</div><div><br></div><div><br></div><div><br></div><div><br></div><div><div><blockquote type="cite">
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Ron,<br>
<br>
Before hitting them with a lot of current, I'd put groups of six on a
lower charge with an external charger for a while. It'll give you a
chance to see how each one is doing. Then re-wire them for 24-volts
and connect the Outback inverter. If they are to come back to life
they'll need a long long time.<br>
<br>
Kent Osterberg<br>
<br>
<br>
<br>
Ron Young wrote:
<blockquote cite="mid:FC61EEF9-C549-4665-8DCD-2E00E2DB2E6D@solareagle.com" type="cite"><font class="Apple-style-span" color="#0f4987" face="Verdana, Helvetica, Arial, sans-serif" size="3"><span class="Apple-style-span" style="font-size: 11px; white-space: pre;"><span class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: 'Trebuchet MS',Verdana,Helvetica,Arial,sans-serif; font-size: 13px; line-height: 18px;">I
have just acquired a 24v set of 1400a/h 2v cells that have been in
storage without a charge for several years. They were connected up in a
system that was never turned on (long story). I believe these batteries
can be recovered if I can get a high enough amp charge into them. The
battery mfg. recommends putting a 200 amp charge on until internal temp
rises to 40 degrees C then let them cool and do it again, maybe 15
times, to blow the sulphates of the plates. Unfortunately I don't have
a 200 amp charger but I do have an Outback 3524 inverter with an 85 amp
charger. I'm wondering if I can force the inverter to maximum charge to
accomplish this.<br>
<br>
I hooked the inverter up but the batteries only have about 10.5 v
output from the batteries (hooked up 12 in series for 24v). For this
reason the Outback won't power up. I am wondering about using a
standalone charger to provide power to the batteries -- which will also
provide power to the inverter -- and allow it to come on and charge. <br>
<br>
Anyone suggest a better way?</span></span></font>
<div><font class="Apple-style-span" color="#333333" face="'Trebuchet MS', Verdana, Helvetica, Arial, sans-serif" size="3"><span class="Apple-style-span" style="font-size: 13px; line-height: 18px;"><br>
</span></font></div>
<div><font class="Apple-style-span" color="#333333" face="'Trebuchet MS', Verdana, Helvetica, Arial, sans-serif" size="3"><span class="Apple-style-span" style="font-size: 13px; line-height: 18px;">Ron
Young</span></font></div>
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