<html><head></head><body bgcolor="#FFFFFF"><div>Hi Rich</div><div><br></div><div>If there are no AC loads, only the inverters then there is no derate for the panel buss.</div><div>However if you connect any other loads such as a metering device, now you have to apply the 120% rule.</div><div><br></div><div>Jay</div><div><br></div><div>Peltz Power</div><div><br></div><div><br></div><div><br><br></div><div><br>On Jan 22, 2012, at 4:53 AM, "Rich Nicol" <<a href="mailto:rich@solartechvt.com">rich@solartechvt.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@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;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";
color:black;}
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
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";
color:black;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.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]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Good Morning Wrenches,<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’m wondering if anyone has an advice on preferred methods and component/panel recommendations for paralleling multiple inverters. The proposed system will utilize 4 SMA6000 inverters (100 amps) and will be a ground mounted system with inverters located outdoors in the cold frigid temperatures of Vermont in a farmer’s field so the panel where we complete the parallel connections needs to be outdoor rated (although it will be sheltered from the worst of the elements). It will be a standalone system with a dedicated utility power drop/meter for the system. My understanding of using a load center in this applications is that the 120% rule will apply as it does in a typical installation per NEC690.64(B)(2)with the bus amp rating for the load center based upon the inverter feed side as well as the over current device on the utility side. <o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Any input regarding preferred panels and configuration is appreciated.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Rich <o:p></o:p></span></p><div><p class="MsoNormal"><o:p> </o:p></p></div></div></div></blockquote></body></html>