<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body><div>Andrew</div><div>Correct, its is all about time, temp cycles will all effect modules, arial IR testing generally will not show new fractures.</div><div>Jerry</div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:85%;color:#575757" dir="auto">Sent from my Verizon, Samsung Galaxy smartphone</div></div><div><br></div><div style="font-size:100%;color:#000000"><!-- originalMessage --><div>-------- Original message --------</div><div>From: Andrew Truitt <atruitt@gmail.com> </div><div>Date: 11/18/18 8:20 PM (GMT-08:00) </div><div>To: RE-wrenches <re-wrenches@lists.re-wrenches.org> </div><div>Subject: Re: [RE-wrenches] Microfractures </div><div><br></div></div><div dir="ltr"><div><br></div><div>Jerry - Thanks for the input! No snail trails or burn marks at his point as the system has yet to be commissioned. There will be an aerial IR inspection once we're operating and if anything shows up it'll be addressed for sure, but my understanding of microfractures is that the effects often don't show up for years (save for what can be seen with EL testing). </div><div><br></div><br clear="all"><div><div dir="ltr" class="m_-6911164847223828320gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><br></div><div><div dir="ltr"><b style="font-size:10pt;font-family:ArialMT,serif,EmojiFont;color:rgb(64,64,64)">Regards, </b><br></div><div dir="ltr"><b style="font-size:10pt;font-family:ArialMT,serif,EmojiFont;color:rgb(64,64,64)"><br></b></div><div dir="ltr"><br></div><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;color:rgb(68,68,68);width:400px;font-size:9pt;font-family:Arial,sans-serif;line-height:normal"><tbody><tr><td style="padding:0px 0px 6px;font-size:12pt;color:rgb(23,147,206);width:259px"><font face="Tahoma, sans-serif"><b>Andrew Truitt</b></font><span style="font-family:Arial,sans-serif"> <table cellpadding="0" cellspacing="0" style="color:rgb(68,68,68);font-size:9pt;border-spacing:0px;border-collapse:collapse;width:400px;line-height:normal"><tbody><tr><td colspan="2" width="400" style="font-family:Arial,sans-serif;padding:0px;font-size:10pt;color:rgb(44,44,44);width:400px"><div style="color:rgb(136,136,136);font-family:arial,sans-serif;font-size:12.8px"><span style="color:rgb(68,68,68)"><span style="font-family:verdana,sans-serif">www.dr.ventures</span></span></div><span style="font-family:arial,sans-serif;font-size:12.8px;color:rgb(68,68,68)"><span style="font-family:verdana,sans-serif">d: 202.486.7507</span></span><span style="font-family:Tahoma,sans-serif"><br></span></td></tr><tr><td colspan="2" width="400" style="font-family:Arial,sans-serif;padding:0px;font-size:10pt;color:rgb(44,44,44);width:400px"><div 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6px;width:141px;text-align:right"><img border="0" alt="Logo" src="https://s8.postimg.cc/vbfqwedet/DRV_-_1920.png" width="200" height="83" class="m_-6911164847223828320gmail-CToWUd" style="border:0px;vertical-align:middle" onmouseover="imageMousePointerUpdate(true)" onmouseout="imageMousePointerUpdate(false)" id="1542608238309"></td></tr><tr><td colspan="2" width="400" style="padding:0px;width:400px;border-top:1px solid rgb(23,147,206)"> <br></td></tr><tr><td colspan="2" width="400" style="padding:0px;font-size:10pt;width:400px"><div style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color 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It is strictly forbidden to share any part of this message with any third party, without a written consent of the sender. If you received this message by mistake, please reply to this message and follow with its deletion, so that we can ensure such a mistake does not occur in the future.</font></span></td></tr></tbody></table><div class="m_-6911164847223828320gmail-yj6qo"></div><br class="m_-6911164847223828320gmail-Apple-interchange-newline"></div></div></div></div></div></div><br><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 16, 2018 at 5:27 PM Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Andrew, Wrenches<div dir="auto">While in Hawaii, l had modules that had fractures, some showed up in low performance, some did not and l don't recall there being a wobble on the high side. I would suggest inspecting what the modules look in question. Most of the time the cracks are visable and may look like worm tracks, they will be across the modules. Also look for what appears to be cigarette burns, this is trace arcing or at least overheating of the trace and they can appear at the interconnecting trace or main traces mostly at the change in direction of the trace. I have also had bad bypass diode connections have issues effecting performance curves.</div><div dir="auto">Jerry</div><div dir="auto">NABCEP Inspector</div><div dir="auto">NABCEP Installer</div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 16, 2018, 12:03 PM Andrew Truitt <<a href="mailto:atruitt@gmail.com" target="_blank">atruitt@gmail.com</a> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div><div><br></div><div>Wrenches - Does anyone have experience getting electroluminescence (EL) test results from module manufacturers? I just shot some module IV curves as part of an acceptance test and they all show some irregularities on the vertical slope that Solmetric says are indicative of microfractures:</div><div><br></div><div><div><div><img src="cid:ii_jokc8y121" alt="image.png" width="542" height="265" onmouseover="imageMousePointerUpdate(true)" onmouseout="imageMousePointerUpdate(false)" id="1542608238310"><br></div></div></div><div><br></div><div><br></div><div>It seems the optimal course of action here is to perform EL testing on a random sample of mods in the field and compare with images from the factory to hone in on the root cause. However field EL testing is not cheap and even if we do determine that the damage occured after modules left the factory, how could it be proven if its the shipper or the EPC at fault? I foresee everyone pushing back and invoking the performance warranty as the backstop if issues pop up in the future (assuming nothing shows up during performance testing next month), but the last thing we want deal with is a massive (or worse, piecemeal) warranty claim in 5 years. Or the array may mildly underperform year over year, not enough to trigger warranties but still costing thousands in lost revenue. The system is a 200kW ground mount in CO using tier 1 (top 5) Chinese modules. Anyone dealt with this type of situation before?</div><div><br></div><br clear="all"><div><div dir="ltr" class="m_-6911164847223828320m_8029084646628279421m_-8677645943017189415gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><br></div><div><div dir="ltr"><b style="font-size:10pt;font-family:ArialMT,serif,EmojiFont;color:rgb(64,64,64)">Regards, </b><br></div><div dir="ltr"><b style="font-size:10pt;font-family:ArialMT,serif,EmojiFont;color:rgb(64,64,64)"><br></b></div><div dir="ltr"><br></div><table cellpadding="0" cellspacing="0" style="border-spacing:0px;border-collapse:collapse;color:rgb(68,68,68);width:400px;font-size:9pt;font-family:Arial,sans-serif;line-height:normal"><tbody><tr><td style="padding:0px 0px 6px;font-size:12pt;color:rgb(23,147,206);width:259px"><font face="Tahoma, sans-serif"><b>Andrew Truitt</b></font><span style="font-family:Arial,sans-serif"> <table cellpadding="0" cellspacing="0" 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