<p dir="ltr">Question, is it the first test where it is checking for noise in the system or is it finding a fault once it is running. Does it have the latest software update, which code do you have test failure or arc failt detected, way different trouble shooting tracks yo follow. If it is a test fail try to remove just the ground wire from the array, because its a metal roof its a big antenna and hears something that is to much for the test to deal with. If it fails due to an arc then there is most likely an arc at a connection.</p>
<p dir="ltr">Jerry</p>
<div class="gmail_extra"><br><div class="gmail_quote">On Jul 22, 2016 3:37 PM, "Glenn Burt" <<a href="mailto:glenn.burt@glbcc.com">glenn.burt@glbcc.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="color:#1f497d">August,<u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">I am currently chasing down unexplained AFCI faults with old SX 160 modules on a metal roof and having replaced two SMA SWR-2500U’s with a SB 5000TL-US-22. So far I have been swapping input strings to see if there is a pattern, however no joy. <u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">Next visit is up on the roof (steep pitch) to see if there is anything obvious. <u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">I hate to simply disable the AFCI functionality without a serious effort, however I am approaching that point. <u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">It is a T&M job for a system installed by others back in 2004, about an hour trip 1 way and I am afraid the customer will soon believe I am stringing out the work.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">Looking forward to hearing more of your experience as it develops!<u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:#1f497d">-Glenn<u></u><u></u></span></p><p class="MsoNormal"><span style="color:#1f497d"><u></u> <u></u></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"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>August Goers<br><b>Sent:</b> Friday, July 22, 2016 10:23 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] Replacing grounded inverters<u></u><u></u></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="color:#1f497d">Glen,</span><u></u><u></u></p><p class="MsoNormal"><span style="color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="color:#1f497d">It’s interesting you mention that you’re having AFCI issues with new TL inverters and old modules. We are too. We have a particular system with BP modules where we’re trying to figure out if we have a warranty claim situation. We’ve cleaned up all the DC-side wiring and still the Sunny Boy is tripping with AFCI errors. We think it is either corroded traces in the modules or perhaps bypass diode issues in the module j-boxes. More to come.</span><u></u><u></u></p><p class="MsoNormal"><span style="color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="color:#1f497d">August</span><u></u><u></u></p><p class="MsoNormal"><span style="color:#1f497d"> </span><u></u><u></u></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"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Glenn Burt<br><b>Sent:</b> Friday, July 22, 2016 5:08 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] Replacing grounded inverters</span><u></u><u></u></p></div></div><p class="MsoNormal"> <u></u><u></u></p><div><div><p class="MsoNormal">If you read some of the proposed changes for the 2017 NEC, it is looking life there will be no problem replacing isolated inverters with non-isolated versions. In fact the proposed wording seems to allow either USE, or PV wire to be used with non-isolated inverters explicitly going forward.<br>It made me feel better about doing recent replacements.<br>I'm having more trouble with the TL inverters and AFCI issues on older systems, however.<u></u><u></u></p></div></div><div><div class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><hr size="2" width="100%" align="center"></span></div><p class="MsoNormal" style="margin-bottom:12.0pt"><b>From: </b><a href="mailto:Gary@SYVSolar.com" target="_blank">Gary at Santa Ynez Valley Solar</a><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br></span><b>Sent: </b>7/21/2016 21:43<span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br></span><b>To: </b><a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><br></span><b>Subject: </b>[RE-wrenches] Replacing grounded inverters<u></u><u></u></p></div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black">We are all facing having to replace the old transformer based inverters when they run out. Really difficult to find replacements. Against code to replace with transformer less ones. I wonder if a DC/DC transformer could be installed just ahead of the transformer less inverter for isolation purposes? Not clear on the concept.</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black">Gary</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black">Gary Gordon</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:4.0pt;font-family:"Gotham Book","serif";color:black"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> <img border="0" width="115" height="39" alt="cid:image001.jpg@01D06621.23813A90"></span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> </span><span style="color:black"><a href="http://www.syvsolar.com/" target="_blank"><span style="font-size:10.0pt;font-family:"Gotham Book","serif"">www.SYVSolar.com</span></a></span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> PO Box 688 </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> Santa Ynez, CA 93460</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> <a href="tel:805%20688-1213" value="+18056881213" target="_blank">805 688-1213</a></span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> NABCEP Certified Installer</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book","serif";color:black"> CA Licensed Solar Contractor</span><u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p></div></div><br>_______________________________________________<br>
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