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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'>We regularly see SGs of 1.300 after EQ on very warm banks & banks that are under used in summer periods. It has seemed to lower with the temp of the bank dropping.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'>Dana Orzel - Great Solar Works, Inc - E - <b>dana@solarwork.com</b> - V <b>970.626.5253</b><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'>F - 970.626.4140 C - 970.209.4076 web - www.solarwork.com <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'>"Responsible Technologies for Responsible People since 1988"<o:p></o:p></span></p><p class=MsoNormal><b><i><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:green'>Please consider the environment before printing this email</span></i></b><span style='font-size:11.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'> </span><span style='font-size:10.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'>NABCEP # 051112-136</span><b><i><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#99CC00'><o:p></o:p></span></i></b></p></div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Allan Sindelar<br><b>Sent:</b> Friday, June 01, 2012 2:29 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] Corrective EQ question<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Wrenches,<br>A long-time off grid client has a 48V Outback VFX system, with 1,680 watts of PV and two strings (16 batteries total) of Deka L16s, installed last October. The array is undersized, as the system is running three households; one efficient home and two single-person tiny homes, but still too much for the system. We learned a few weeks ago that the system had apparently stayed at 30-50% SOC for the entire winter (this is approximate, as her TriMetric monitors would eventually drift away from % accuracy if never allowed to get full and reset). Eventually the batteries became sufficiently sulfated that the system began shutting down.<br><br>As the batteries were nearly new, we figured that the sulfation had not yet become permanently crystallized, and they could recover. We initiated a long "corrective equalization" from her combined generator (45A DC from the single inverter) and MX60 controller, for a maximum C/12.5 charge rate; less in proportion to any loads that were on while charging. She ran this procedure for three hours/day for five days, and when that offered only partial recovery (as measured by specific gravity measured with a refractometer), ran for six hours/day for five days. During this time the MX60 was also manually set to EQ each morning, with a 62V EQ voltage and 3 hour EQ time, so that the array would add its amperage to the gennie until the batteries had been above this setting for three hours.<br><br>We went out there yesterday, arriving while the EQ was in process. All of the cells had recovered, as measured by SG. SG readings were all in the 1.280 - 1.300 range, with most above 1.290. We had never seen SG readings this high before. Given the situation and the back story, should we have any concern about the high SG readings?<br><br>Thank you,<br>Allan<o:p></o:p></p><div><p class=MsoNormal>-- <br><b>Allan Sindelar</b><br><span style='font-size:10.0pt'><a href="mailto:Allan@positiveenergysolar.com"><span style='color:#000099'>Allan@positiveenergysolar.com</span></a></span><br><span style='font-size:10.0pt'>NABCEP Certified Photovoltaic Installer<br>NABCEP Certified Technical Sales Professional<br>New Mexico EE98J Journeyman Electrician<br>Founder and Chief Technology Officer<br><b>Positive Energy, Inc.</b><br>3209 Richards Lane (note new address)<br>Santa Fe, New Mexico 87507<br><b>505 424-1112</b><br><a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-right:722.25pt;mso-margin-bottom-alt:auto'><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>