<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.apple-style-span
{mso-style-name:apple-style-span;}
span.apple-converted-space
{mso-style-name:apple-converted-space;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</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'>Thanks for the response David, this is what I was kind of expecting.<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'>I was hoping for some sort of “magic box” that attached to the first, and last module in the string, and would shut the string down if it lost signal from the inverter. Similar to how solar edge works, but with only 1-2 units/string. <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'>I like Solar Edge, but we try very hard to offer US made equipment as our primary offering. Right now it seems that 690.12 is just increasing the US made premium, to the point where I don’t imagine US inverters will be even 5% of our residential installation base next year when 2014 NEC hits the majority of our jurisdictions. Makes me sad.<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><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>With Regards,<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'>Daniel Young, <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>NABCEP Certified PV Installation Professional<sup>TM</sup>: Cert #031508-90<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>NABCEP Certified Solar Heating Installer<sup>TM</sup>: Cert #SH031409-13<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></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:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>David Brearley<br><b>Sent:</b> Wednesday, October 29, 2014 2:26 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] SPI 2014<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Daniel,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Here's some of what I learned about solutions for 690.12.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><u>Residential rapid shutdown</u><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>SMA's TL-US series inverters can meet the 10 second requirement in 690.12 without further mediation. Therefore you can meet 690.12 with these string inverters by adding a ground-level rapid shutdown controller (an e-stop button) and a rooftop rapid shutdown box (a pass-through wiring box w/ contactors to open each source circuit conductor.) <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>While SMA may be working on an in-house solution for these components, Bentek solar has a third-party solution that will be available very soon:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://www.bentek.com/solar-products/disconnect-systems/rapid-shutdown-systems/">http://www.bentek.com/solar-products/disconnect-systems/rapid-shutdown-systems/</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>This same product works w/ ABB UNO-series inverters, which can also meet the 10-second requirement w/out additional mediation. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>It sounds like these products will run about $700 in the short-term, but are expected to sell for less than $500 as demand scales.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><u>Commercial rapid shutdown</u><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Many companies are leading with low-profile inverter skids that allow 3-phase string inverters to be located on a commercial rooftop w/in the array field. In some cases, these mounting products are offered from the inverter company (AE), but there are also many third-party providers (SolarBOS, Bentek, etc.) w/ solutions for ABB inverters, SMA inverters, etc.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The motivation to put string inverters on commercial rooftops is largely driven by the cost of arc-fault & rapid shutdown enabled combiners. If you want to use a central inverter, it looks like you'll have to spend 2X as much money on your source circuit combiners as you are now in order to meet these code requirements.<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'>David Brearley<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'>Senior Technical Editor,<span class=apple-converted-space> </span><i>SolarPro</i><span class=apple-converted-space> </span>magazine<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'>NABCEP Certified PV Installation Professional<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><a href="mailto:david.brearley@solarprofessional.com">david.brearley@solarprofessional.com</a><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'>Direct: 541.261.6545<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'>Check out this AMAZING music video tribute to SolarPro: <a href="http://bit.ly/1qfMCCh">http://bit.ly/1qfMCCh</a><o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Oct 29, 2014, at 12:45 PM, <a href="mailto:re-wrenches-request@lists.re-wrenches.org">re-wrenches-request@lists.re-wrenches.org</a> wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#7F7F7F'><br>From:<span class=apple-converted-space> </span></span></b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'>"Daniel Young" <<a href="mailto:dyoung@dovetailsolar.com">dyoung@dovetailsolar.com</a>><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#7F7F7F'>Subject:<span class=apple-converted-space> </span></span></b><b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'>Re: [RE-wrenches] SPI 14 Post Show Request for Comments</span></b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#7F7F7F'>Date:<span class=apple-converted-space> </span></span></b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'>October 29, 2014 9:34:48 AM CDT<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#7F7F7F'>To:<span class=apple-converted-space> </span></span></b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'>"'RE-wrenches'" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#7F7F7F'>Reply-To:<span class=apple-converted-space> </span></span></b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'>RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'><br><br><span class=apple-style-span>I too am interested. Especially after the teaser from SMA that they would</span><br><span class=apple-style-span>unveil their solution to the 2014 NEC 690.12 fiasco at the show. I see</span><br><span class=apple-style-span>nothing on SMA's website as of yet.</span><br><br><span class=apple-style-span>With Regards,</span><br><br><span class=apple-style-span>Daniel Young,</span><span class=apple-converted-space> </span><br><span class=apple-style-span>NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90</span><br><span class=apple-style-span>NABCEP Certified Solar Heating InstallerTM: Cert #SH031409-13</span><br><br><span class=apple-style-span>-----Original Message-----</span><br><span class=apple-style-span>From: RE-wrenches [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On</span><br><span class=apple-style-span>Behalf Of Bill Loesch</span><br><span class=apple-style-span>Sent: Wednesday, October 29, 2014 8:21 AM</span><br><span class=apple-style-span>To: RE-wrenches</span><br><span class=apple-style-span>Subject: [RE-wrenches] SPI 14 Post Show Request for Comments</span><br><br><br><span class=apple-style-span>Gentlemen & Ladies,</span><br><br><span class=apple-style-span>Anyone who went to the LAS show have any comments? Hopefully, not everything</span><br><span class=apple-style-span>that happens in Vegas stays in Vegas.</span><br><br><span class=apple-style-span>Thanks for sharing,</span><br><br><span class=apple-style-span>Bill Loesch</span><br><span class=apple-style-span>Solar 1 - Saint Louis Solar</span><br><span class=apple-style-span>314 631 1094</span><br><br></span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div class=MsoNormal align=center style='text-align:center'><hr size=1 width="100%" noshade style='color:#A0A0A0' align=center></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>No virus found in this message.<br>Checked by AVG - <a href="http://www.avg.com">www.avg.com</a><br>Version: 2012.0.2247 / Virus Database: 4031/7973 - Release Date: 10/29/14<o:p></o:p></p></div></body></html>