<html><head><base href="x-msg://12/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">What is the Spg (use a good refractometer)of each cell 1.11?1.15? that temp is not to hi especially w/ the temp comp. Charging w/ the unit in bulk, the inverter will see voltage rise quickly and decide that they are charged. disconnect the batteries and check as individual units Eq at high voltage `32 v and a low charge rate 10 amps, watch the temp Spg . I would suggest that if at all possible remove 2 sets and eq from the grid for ~week on /off.DO use a temp sensor and watch the spg. See Surrette's tech bulletin re/ highly sulfated batteries. <a href="http://www.surrette.com">www.surrette.com</a>.<div>Anything over 2 strings will cause a headache, BUT thats more the norm w/ the cheep off grid, I'm going to manage my gen run time kinda of folks!<div><div><div>On Dec 19, 2013, at 1:28 AM, frenergy wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Times; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div bgcolor="#ffffff"><div>Gentlemen and women,</div><div> </div><div> I have been called in to deal with a pack of 16 (4 strings of 4 for 24V), L-16s, 6 years old. She is having to run her generator 2 times a day. Here in N.E. CA. its been cold, mostly clear, little wind. Her inputs are about 1 KW of PV, and small wind machine and of course a serious generator. Cables and terminals looked clean, were tight. The bulk setting on the Trace 4024 was 28.0 V for 2 hrs with RTS, however, she would manually turn off the generator soon after it reached 28V. Recipe for suphation.</div><div> </div><div> Rather than getting into too much detail, here's my quandary. When I fired up the generator, the input amps in each of the 4 strings were.... string #1:29A, 2:34 A, 3:25 A, 4: 13 A. A survey of IR temps throughout the pack gave temps ranging from 63 to 92 degrees. The highest temps were in the string pulling highest amps. In trying to find shorted/failed and/or sulphated cells which data are most relevant? Temps, amp draw during charge, disconnect strings from each other and check volts of each 6 volt batt?, active bubbling? ...all the above? </div><div> </div><div> I'm thinking I should have (1) checked the amp draw with batts under load/genny off in each string AND (2) check amps between strings with the pack at rest, no input or output. I would love to EQ the pack but with a temp already in the 90's and uneven currents in the strings I don't want to risk too high of temp or worse, a runaway situation and fire. I'm thinking I'd like to yank a few bad batts and run on 3 strings and then carefully EQ. </div><div> </div><div>I appreciate any insights.</div><div> </div><div>Thanks in advance,</div><div> </div><div>Bill</div><div><span><FRS_working_logo.jpg></span></div>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address:<span class="Apple-converted-space"> </span><a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Change email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive:<span class="Apple-converted-space"> </span><a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br><br></div></span></blockquote></div><br><div>
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