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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">William,</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">We have bumped into similar dilemmas when needing remote DC disconnects with TL inverters. I believe the Solectria you are using has two MPPTs? Ideally, you would keep each string separate to benefit from the dual trackers – this would mean four DC disconnects if you went with a standard product like a Square D HU361RB. If you combine each of the two strings out at the array(s) then you could get away with two disconnects, one for each inverter. Neither option is ideal.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">Best,</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">August</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a">Luminalt</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#44546a"> </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>William Miller<br><b>Sent:</b> Monday, October 06, 2014 9:01 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] TL inverter with long DC Feeder</span></p></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal">Friends:</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">If only an SMA would work here. But DC volts too low. We are using Solectria PVI5200TLS. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">We do not use PV wire. We transition to THWN-2 in conduit immediately. </p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">William</p></div><div><p class="MsoNormal"><br>Miller Solar</p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>On Oct 6, 2014, at 8:30 PM, Chris Mason <<a href="mailto:cometenergysystems@gmail.com">cometenergysystems@gmail.com</a>> wrote:</p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><div><p class="MsoNormal">I presumed SMA TL series. </p></div><div><p class="MsoNormal"> </p><div><p class="MsoNormal">On Mon, Oct 6, 2014 at 10:02 PM, Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>> wrote:</p><p>As i read the thread you say TL which TL SMA, AE ect. They have defferent dc input designs</p><div><div><div><p class="MsoNormal">On Oct 6, 2014 12:21 PM, "jay peltz" <<a href="mailto:jay@asis.com" target="_blank">jay@asis.com</a>> wrote:</p><div><p class="MsoNormal">I do believe the outback and midnite combiners have a lock hole to prevent exactly your concern.</p><div><p class="MsoNormal">unauthorized access.</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">jay</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">peltz power</p><div><div><p class="MsoNormal">On Oct 6, 2014, at 11:40 AM, William Miller wrote:</p></div><p class="MsoNormal"><br><br></p><div><div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Wrenches:</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">We are getting up to speed on using transformer-less inverters.  I have advocated long for the additional safety offered by these inverters but I am realizing the trade-offs with the new technology:  The implementation gets more complicated with the requirement for PV wire, OCPD and disconnecting means for plus and minus and plus providing  Arc Flash rated equipment.</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I am currently designing a system that will locate the PV about 400 feet from the residence.  The system will utilize 2 Solectria 5200 watt inverters at the residence.  I would like to provide disconnecting means for the 4 strings at the array, in case of any needed service or excavating.  Preferably I’d like the disconnecting means to be deployable by a lay person (i.e. the gardener).</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Finding an 8 pole, arc flash, 600 VDC rated disconnect is not easy.  I could install an Outback 8 circuit combiner with 8 touch-safe fuse holders.  The new combiners have had dead-fronts for a while now.  The gardener needs only to have a Philips screw driver to open this cover.  Any better ideas out there?</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Thanks,</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">William</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><image002.jpg><br>Lic 773985<br></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a href="http://www.millersolar.com/" target="_blank"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">millersolar.com</span></a></span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><br><a href="tel:805-438-5600" target="_blank">805-438-5600</a></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""></span></p></div><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span></p></div></div><p class="MsoNormal" style="margin-bottom:13.5pt"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a><br><br>Check out or update participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a></span></p></div></div><p class="MsoNormal"> </p></div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a><br><br>Check out or update participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank">www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