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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d">Dave:</span></p><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d">E-gauge will not test for line noise. You need a power quality monitor. The cheapest one and the only one I have used is the Fluke VR1710.</span></p><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d">William</span></p><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><img width="64" height="28" style="width:.6666in;height:.2916in" id="Picture_x0020_1" src="cid:image003.jpg@01D23DF0.276017A0" alt="Gradient Cap_mini"><br>Lic 773985<br><a href="http://www.millersolar.com/"><span style="color:blue">millersolar.com</span></a><br>805-438-5600</span></p><p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1f497d"> </span></p><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",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>Dave Tedeyan<br><b>Sent:</b> Sunday, November 13, 2016 5:37 PM<br><b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br><b>Subject:</b> Re: [RE-wrenches] SMA Arc-Fault</span></p><p class="MsoNormal"> </p><div><p class="MsoNormal">Howie, </p><div><p class="MsoNormal">Yes, we have actually already replaced both inverters on site and the</p></div><div><p class="MsoNormal">issues are still happening. At this point I doubt that we could have </p></div><div><p class="MsoNormal">gotten 4 units with faulty arc fault sensors...</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Drake, </p></div><div><p class="MsoNormal">I am beginning to think that it may be some noise from the utility.</p></div><div><p class="MsoNormal">Would you know of a way to test for this? eGague unit maybe?</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">Cheers, </p></div><div><p class="MsoNormal">Dave</p></div><div><p class="MsoNormal"> </p></div></div><div><p class="MsoNormal"><br clear="all"></p><div><div><div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif">--</span></b></p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif">Dave Tedeyan</span></b></p></div><div><p class="MsoNormal"><b>Project Engineer</b></p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal"><b>Taitem Engineering, PC</b></p></div><div><p class="MsoNormal">109<span style="color:black"> S. Albany Street, Ithaca, NY 14850</span></p></div><div><p class="MsoNormal"><span style="color:black">Voice: (607) 277-1118 x121</span></p></div><div><p class="MsoNormal"><a href="http://www.taitem.com/" target="_blank"><span style="color:black">www.taitem.com</span></a></p></div></div></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal">On Fri, Nov 11, 2016 at 10:15 AM, Drake <<a href="mailto:drake.chamberlin@redwoodalliance.org" target="_blank">drake.chamberlin@redwoodalliance.org</a>> wrote:</p><blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in"><div><p class="MsoNormal">Electrical noise coming in from the utility side can also cause an arc fault code.<br><br>At 07:32 AM 11/11/2016, you wrote:<br><br></p><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><p class="MsoNormal">This array is a ground mount, so not on a roof, and no radio towers nearby.<br><br>As for grounding, The array and the shed with the interconnection point are in the same area.<br>There are a couple ground rods there, which everything on the AC side is connected to, <br>including a #6 wire from each inverter. there is just a #10 ground coming from the array to the inverters. <br>The house is a couple hundred feet away and has its own grounding electrode system.<br><br>Jerry,<br>The inverters are new (replaced 2 months ago), but it is a good idea to check firmware.<br>As for AC loads, nothing stands out as the types of things you mentioned, although there<br>may be a well pump. They also do have a large water storage tank for heating, but they<br>say that they have not needed to use it yet this year. Then there is also the generator...<br><br>Thanks for your recommendations.<br>-Dave<br><br><br><br><b><span style="font-family:"Arial",sans-serif">--<br><br>Dave Tedeyan</span></b><br>Project Engineer<br><br><b>Taitem Engineering, PC<br></b>109 S. Albany Street, Ithaca, NY 14850<br>Voice: <a href="http://??" target="_blank">(607) 277-1118 x121</a><br><a href="http://www.taitem.com/" target="_blank">www.taitem.com</a><br><br>On Thu, Nov 10, 2016 at 9:51 PM, Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a> > wrote:</p><p class="MsoNormal" style="margin-left:.5in">Dave.</p><p class="MsoNormal" style="margin-left:.5in">We have many TL-22 in the field and they will detect faults even when they are normal contactor faults, have you made sure the SW is the latest, last I checked it is 2.65.3R and it may have a patch in there, you can turn off the feature for testing only and see if you melt something down but if you do please be on site as a arc may happen. Do you have a well, AC system with contacts, welders, compressors, anything that has a dry contacts that brakes under load, this is another place I would look. Every time we have had a code out it was real weather from something normal or a wire issue. Not to brag but we have hundreds in the field from the 3's to the 24's and as much as I dread getting a call with this issue I can usually find the problem and it can be either AC or DC.</p><p class="MsoNormal" style="margin-left:.5in"><span style="color:#888888">Jerry </span></p><p class="MsoNormal"> </p><p class="MsoNormal" style="margin-left:.5in">On Thu, Nov 10, 2016 at 8:14 AM, Dave Tedeyan <<a href="mailto:dtedeyan@taitem.com" target="_blank">dtedeyan@taitem.com</a>> wrote:</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">Hi All, </p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">Maybe someone will have some ideas for why a couple inverters keep arc faulting:</p><p class="MsoNormal" style="margin-left:.5in">-There are two SB7000TL-22 inverters, Sunpower branded.</p><p class="MsoNormal" style="margin-left:.5in">-3 Strings of 7 SPR-327's to each inverter. Kept separate until the inverter.</p><p class="MsoNormal" style="margin-left:.5in">-Ground mount about 50' from the shed where the inverters are located (indoors)</p><p class="MsoNormal" style="margin-left:.5in">-Simple grid connected system, no batteries.</p><p class="MsoNormal" style="margin-left:.5in">-There is a whole house generator co-located in the shed.</p><p class="MsoNormal" style="margin-left:.5in">-We interconnect by using piercing taps on the line side of the generator transfer switch</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">-There has been only one power outage there since the system was installed in April, but the generator fires up weekly.</p><p class="MsoNormal" style="margin-left:.5in">-The arc faults have been happening on both inverters. Sometimes only one at a time, sometimes both will go within a day of each other.</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">-The events have been approximately one a month, but sometimes more, sometimes less.</p><p class="MsoNormal" style="margin-left:.5in">-We have already checked every single connection in the system twice, by two different people.</p><p class="MsoNormal" style="margin-left:.5in">-We have replaced the underground wires (and they looked just fine)</p><p class="MsoNormal" style="margin-left:.5in">-We have replaced all home runs.</p><p class="MsoNormal" style="margin-left:.5in">-We have replaced both inverters.</p><p class="MsoNormal" style="margin-left:.5in">-Arc faults are still happening.</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">-Arc faults are not always on the same day/time of the week.</p><p class="MsoNormal" style="margin-left:.5in">I am wondering if this can be caused by the generator? </p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">Has anyone run into a situation like this or something similar?</p><p class="MsoNormal" style="margin-left:.5in">Thanks for your help,</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">Dave</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in"><span class="hoenzb"><span style="font-family:"Arial",sans-serif;color:#888888">--</span></span></p><p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Arial",sans-serif;color:#888888">Dave Tedeyan</span></p><p class="MsoNormal" style="margin-left:.5in"> </p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in"><span class="hoenzb"><span style="color:#888888">Project Engineer</span></span></p><p class="MsoNormal" style="margin-left:.5in"><span class="hoenzb"><span style="color:#888888">Taitem Engineering, PC</span></span></p><p class="MsoNormal" style="margin-left:.5in"><span class="hoenzb"><span style="color:#888888">109 S. Albany Street, Ithaca, NY 14850</span></span></p><p class="MsoNormal" style="margin-left:.5in"><span class="hoenzb"><span style="color:#888888">Voice: <a href="http://??" target="_blank">(607) 277-1118 x121</a></span></span></p><div><div><p class="MsoNormal" style="margin-left:.5in"> </p></div></div><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in"><a href="http://www.taitem.com/" target="_blank">www.taitem.com</a></p><p class="MsoNormal" style="margin-left:.5in">_______________________________________________</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">List sponsored by Redwood Alliance</p><p class="MsoNormal" style="margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a></p><p class="MsoNormal" style="margin-left:.5in">Change listserver email address & settings:</p><p class="MsoNormal" 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