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<font size="3" face="Lucida Grande">Morning Jay,</font> </p>
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<font size="3" face="Lucida Grande">I don't have a lot of good news for you - but maybe others do? Years ago, I visited a commercial fishing client that had a 6 week old 32VDC bank of batteries that were "not performing". Once we reviewed, we noticed a tap 6 cells in.....for 12V radios. Boat had been out for a 6 week run, which meant 6 weeks of charging at ~2.3VPC and the 10 non tapped cells were toasted (red cases were actually black). Of course, client wanted warranty but that is another story.</font> </p>
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<font size="3" face="Lucida Grande">Your only hope is to separate the "low" 12V bank and charge to 100% SOC. Then charge the "hi" 12V bank to 100% (probably already there or beyond). Finally, marry the banks again and "balance" with a 2.35 - 2.4VPC until cell voltage stabilizes. Current acceptance will be low but voltage will ultimately stabilize across the bank.</font> </p>
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<font size="3" face="Lucida Grande">The problem is, the "low" bank has been undercharged for 2 years and the "hi" bank has been severely overcharged. As a result the capacity / corrosion differences between the two "sides" will be great - leading to charging difficulties going forward, which may result in the bank needing to be replaced. However, I would recommend attempting to bring the bank into line before replacing.</font> </p>
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<font size="3" face="Lucida Grande">I hope this is of assistance,</font> </p>
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<font size="3" face="Lucida Grande">Jamie</font> </p>
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<br>James Surrette<BR><BR>Surrette Battery Co. Ltd<BR>1 Station Rd.<BR>Springhill, NS, CAN<BR>B0M 1X0<BR><BR>Direct: 902.597.4027<BR>Fax: 902.597.8447<BR><BR><br><br>>>> jay peltz <jay@asis.com> 09/04/08 1:25 AM >>><br>HI All,<br><br>A guy has 1/2 loaded his big surrette 24v battery,  yep put 12v loads <br>onto only one side of the 24v battery.<br><br>Now after 2 yrs 12v side is low voltage, 24v side is boiling like crazy.<br><br><br>System is charged via SW4024, big genny and good size array.<br><br>so my question is can/should I<br><br>1. remove the 12v by installing a Vanner or similar.<br><br>2. put a 12v charger onto the lower 12v side to put an equal charge <br>into the batteries.<br>( I have never had success trying to charge up a highly unbalanced <br>battery)<br><br><br>thanks,<br><br>jay<br><br>peltz power<br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: RE-wrenches@lists.re-wrenches.org<br><br>Options & settings:<br><a href="http://lists.re">http://lists.re</a>-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<br><br>List-Archive: <a href="http://lists.re">http://lists.re</a>-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br>
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