<p dir="ltr">I have these same modules at my home (circa 2002 i believe). I have found issues with two modules (out of 30 mods) that had intermittent connections due to the spot welds opening on the tabs coming from the back sheet, going to the diodes in the j box. I fixed it with very small stainless machine screws and nuts with toothed washers. I woild look carefully at these connections, as they are not easy to see problems. Good luck. </p>
<p dir="ltr">RoyR</p>
<p dir="ltr">Roy Rakobitsch<br>
NABCEP Certified Small Wind Installer®<br>
NABCEP Certified Solar PV Installer®<br>
Certified Advanced Tower Climbing, Safety & Rescue<br>
Wind/PV Design Engineer<br>
Windsine LLC<br>
631-514-4166<br>
<a href="http://www.windsine.org">www.windsine.org</a></p>
<div class="gmail_quote">On Nov 18, 2015 3:38 PM, "Steve Jefferson" <<a href="mailto:Steve.Jefferson@sma-america.com">Steve.Jefferson@sma-america.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Afternoon wrenches,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I have a friend who I helped install second hand modules onto a pergola structure at their home.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">The system is as follows:<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">44 – Siemens SP-150<u></u><u></u></p>
<p class="MsoNormal">1 – SMA SB6000US-12 (XFMR unit)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Since install, they have not produced half of what they should be. I have tested the diodes and they seem to be good, there were a couple that tested questionable, so they were replaced.<u></u><u></u></p>
<p class="MsoNormal">VOC is good, but it seems that under load the system goes to garbage.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I am at a loss of what/how to test anything else that may determine cause.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Would a PV Analyzer help? Would there happen to be anyone in the Sacramento area with one who could come to the site? Obviously the customer will pay for their time.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks in advanced.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">SMA America, LLC<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Steve Jefferson<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Service Line Supervisor<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">3925 Atherton Ave<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Rocklin, CA 95765 - 3714<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">U.S.A.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Tel: <a href="tel:%2B1%20916%20625%203185" value="+19166253185" target="_blank">+1 916 625 3185</a> (direct)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Fax: <a href="tel:%2B1%20916%20625%200871" value="+19166250871" target="_blank">+1 916 625 0871</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Mobile: <a href="tel:%2B1%20916%20622%204253" value="+19166224253" target="_blank">+1 916 622 4253</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d">Email:
</span><a href="mailto:Steve.jefferson@SMA-America.com" target="_blank"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue">Steve.jefferson@SMA-America.com</span></a><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"><u></u><u></u></span></p>
<p class="MsoNormal"><a href="http://www.sma-america.com/" target="_blank"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue">www.SMA-America.com</span></a><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
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