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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="color:#1f497d">Glen,</span></p><p class="MsoNormal"><span style="color:#1f497d"> </span></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></p><p class="MsoNormal"><span style="color:#1f497d"> </span></p><p class="MsoNormal"><span style="color:#1f497d">August</span></p><p class="MsoNormal"><span style="color:#1f497d"> </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">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></p></div></div><p class="MsoNormal"> </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.</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">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">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<span style="font-size:12.0pt;font-family:"Times New Roman","serif""></span></p></div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";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></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black">Gary</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black">Gary Gordon</span></p><p class="MsoNormal"><span style="font-size:4.0pt;font-family:"Gotham Book";color:black"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> <img border="0" width="115" height="39" id="Picture_x0020_1" src="cid:image001.jpg@01D1E37E.6CF62470" alt="cid:image001.jpg@01D06621.23813A90"></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> </span><span style="color:black"><a href="http://www.syvsolar.com/"><span style="font-size:10.0pt;font-family:"Gotham Book"">www.SYVSolar.com</span></a></span><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> PO Box 688 </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> Santa Ynez, CA 93460</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> 805 688-1213</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> NABCEP Certified Installer</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Gotham Book";color:black"> CA Licensed Solar Contractor</span></p><p class="MsoNormal"> </p></div></body></html>