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</o:shapelayout></xml><![endif]--></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:#1F497D'>How about 705.20 and 21?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><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:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Corey Shalanski<br><b>Sent:</b> Thursday, June 26, 2014 6:11 PM<br><b>To:</b> re-wrenches@lists.re-wrenches.org<br><b>Subject:</b> Re: [RE-wrenches] Combining Multiple Inverters<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><img id="_x0000_i1025" src="https://mailfoogae.appspot.com/t?sender=aY3NoYWxhbnNraUBqb3VsZS1lbmVyZ3kuY29t&type=zerocontent&guid=4710ea9a-f97d-435f-a3b5-0de6c0b1180d"><span style='font-size:7.5pt;font-family:"Euphemia","sans-serif";color:white'>ᐧ</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>Perhaps I should've been more specific with my scenario. I was imagining a supply side connection, as this would more commonly be the case when combining multiple inverters. In this case it seems like the provisions of 705.12(D) for load side conections don't even apply, no? Rather 705.12(A) becomes the relevant section, and I see very few restrictions there.</span><o:p></o:p></p><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>Even with a load side connection I would tend to agree with Jason's interpretation: Does the "source interconnection" in 705.12(D)(1) refer to each individual inverter, or can it refer to an aggregated "source"?</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>I am interested in pursuing this idea, mainly to understand how/where the NEC forbids it. In lieu of a clear Code reference against it, how is this any different from a branch circuit (in reverse)? ie, as with microinverters.</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div><div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>--</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>Corey Shalanski</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>Joule Energy</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>New Orleans, LA</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><div><div id=":2m1"><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'><img id="_x0000_i1026" src="https://ssl.gstatic.com/ui/v1/icons/mail/images/cleardot.gif"></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div></div><div><div><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>On Thu, Jun 26, 2014 at 9:20 AM, <<a href="mailto:re-wrenches-request@lists.re-wrenches.org" target="_blank">re-wrenches-request@lists.re-wrenches.org</a>> wrote:</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'><br>Message: 11<br>Date: Thu, 26 Jun 2014 09:10:07 -0400<br>From: Jason Szumlanski <<a href="mailto:jason@fafcosolar.com" target="_blank">jason@fafcosolar.com</a>><br>To: RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>><br>Subject: Re: [RE-wrenches] Combining Multiple Inverters<br>Message-ID:<br> <<a href="mailto:CAJJtG3oQGBLzatinUHFp_GhivzYD6dLdsLAnkc1ofG9tR1RFgA@mail.gmail.com" target="_blank">CAJJtG3oQGBLzatinUHFp_GhivzYD6dLdsLAnkc1ofG9tR1RFgA@mail.gmail.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>705.12(D) reads, "... the interconnection provisions for the<br>utility-interactive inverter(s) shall comply with (D)(1) through (D)(7)."<br>That's inverters - plural. The interconnection must be protected by<br>dedicated OCPD, not each inverter individually. Microinverters comply<br>because of this interpretation.<br><br>That said, I've never done it. An accumulator panel is pretty cost<br>effective when you consider the alternative cost of an enclosure and the<br>Polaris connectors. I guess if you are making the Polaris connections<br>inside the main load center or inside an inverter you can eliminate the<br>cost of a dedicated enclosure. There would be some material and labor<br>savings.<br><br>?If the inverter has a maximum OCPD rating, you will be limited by that.<br>?Microinverters "get around" that by the wire and inverter being<br>sized/rated for the entire maximum string.<br><br>Jason Szumlanski<br><br>?Fafco Solar?</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p></div></div></div></div></div></div></div></div></body></html>