<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:w="urn:schemas-microsoft-com:office:word"><head><META content="text/html; charset=us-ascii" http-equiv="Content-Type">
<META content="text/html; charset=us-ascii" HTTP-EQUIV="Content-Type"><meta content="Microsoft Word 14 (filtered medium)" name=Generator><!--[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: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;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"\0027Franklin Gothic Medium\0027";
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* 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
{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";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@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>
<DIV><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dan,<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'>Thank you SO much for that post. You are absolutely right on.<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'>EVERY component in a circuit can be the weak link. Component quality, design margin, and actual use conditions really dictate what is going to fail, and when.<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:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'>See ya!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'>Marv<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Director of Technology and Support, North America<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>SolarEdge Technologies, Inc.<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Tech Support North America: +877.360.5292<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Mobile: +530.392.0356<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><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-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Exeltech<br><b>Sent:</b> Thursday, January 12, 2012 3:59 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] SolarEdge v Enphase<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><table border=0 cellpadding=0 cellspacing=0 class=MsoNormalTable><tr><td style='padding:0in 0in 0in 0in' valign=top><p class=MsoNormal style='margin-bottom:12.0pt'>Wrenches,<br><br>I wish this urban myth about electrolytic capacitors would<br>die, but it won't. It's been a wonderful marketing ploy for<br>some time now.<br><br>Simply stated, existence of electrolytic capacitors in inverters<br>does NOT mean the inverters are less reliable. Satellites<br>have been using electrolytic caps for decades, and look<br>how long THEY last! (I know, because I've helped to design<br>power supplies for aerospace applications.)<br><br>What it boils down to is this: if a quality electrolytic capacitor<br>is used within its specifications, you can expect 60+ years<br>of life from it in an inverter application. Conversely, if a<br>circuit is poorly designed, you can ruin any electronic part<br>in a very short time.<br><br>What defines capacitor "life"? It's defined as the doubling<br>of the internal effective series resistance of the capacitor<br>from the value it had when it (the cap) was new.<br><br>This is energy lost. It also causes the capacitor to operate<br>at a slightly higher internal temperature than when it was<br>new (all other factors being the same).<br><br>Result? It all depends on how the circuit is designed. In<br>our case, the inverter efficiency decreases approximately<br>a quarter to one half of a percent. The waveform distortion<br>also increases, but it takes lab grade equipment to detect<br>the change. If you're worried about a 1/2 percent drop in<br>the inverter efficiency, your concern is misplaced. After all,<br>PV degrades over time much more than that!<br><br>So why the bad rap on capacitors?<br><br>Like tires, they DO wear out. 40 years ago, "premium"<br>tires were rated for 30,000 miles. Could you wear them<br>out in less? Absolutely! Drive like a 16 year old kid with<br>a muscle car, and it's easy. On the other hand, I just bought<br>a new set of tires. The old ones still had tread, but at 88,000<br>miles, they'd seen their better days. This is a far cry from 30k<br>mile tires.<br><br>Capacitors have progressed in the same manner. A long time<br>ago, capacitors wore out in 5 to 10 years. Today, it's an entirely<br>different story.<br><br>As long as the circuits in which the electrolytic capacitors are<br>used are well designed, you have nothing to worry about.<br>Electrolytic capacitors in a well-designed application will outlive<br>all of us.<br><br><br>Dan Lepinski<br>Senior Engineer<br>Exeltech<br><br><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>From: Andrew Truitt <atruitt@gmail.com><br>Subject: Re: [RE-wrenches] SolarEdge v Enphase<br>To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org><br>Date: Thursday, January 12, 2012, 12:25 AM<o:p></o:p></p><div id=yiv763444694><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Does anyone have any experience installing SolarEdge? The advantage that I see over microinverters from a reliability standpoint is that the power optimizers do not contain electrolytic capacitors. The inverter is also supposed to last longer since it does not handle the MPPT duties so the electronics are less complex.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Marv - Do you have any SolarEdge reliability and / or performance data you can share beyond the white paper on the SolarEdge website? Also, one issue that I've had with Enphase is an occasional loss of data transfer between inverters and the monitoring system - does SolarEdge have that issue? If not, how have you overcome it? Can you share a link to a live SolarEdge system monitoring interface?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Andrew Truitt<o:p></o:p></p></div><div><p class=MsoNormal>Truitt Renewable Energy Consulting<o:p></o:p></p></div><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>On Thu, Jun 9, 2011 at 12:40 PM, Mark Frye <<a href="/mc/compose?to=markf@berkeleysolar.com" target="_blank">markf@berkeleysolar.com</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:blue'>Indeed.....</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:blue'>Yes it is 1v per module when not operating, but still >250V when operating. That means that all code requirements for >250V still apply to the DC wiring such as bonding bushings for conduit as required etc.</span><o:p></o:p></p><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:blue'>SolarEdge is making hay off of this safety feature, but this feature is inherent in microinverters as well. </span><o:p></o:p></p></div><div><p><br><span style='font-family:"Arial","sans-serif"'>Mark Frye</span> <br><span style='font-family:"Arial","sans-serif"'>Berkeley Solar Electric Systems</span> <br><span style='font-family:"Arial","sans-serif"'>303 Redbud Way</span> <br><span style='font-family:"Arial","sans-serif"'>Nevada City, CA 95959</span> <br><span style='font-family:"Arial","sans-serif"'>(530) 401-8024</span> <br><a href="http://www.berkeleysolar.com/" target="_blank"><span style='font-family:"Arial","sans-serif"'>www.berkeleysolar.com</span></a><span style='font-family:"Arial","sans-serif"'> </span> <o:p></o:p></p><div><p class=MsoNormal> <o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><div align=center class=MsoNormal style='text-align:center'><hr align=center size=3 width="100%"></div><p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-family:"Tahoma","sans-serif"'> <a href="/mc/compose?to=re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a> [mailto:<a href="/mc/compose?to=re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>benn kilburn<br><b>Sent:</b> Thursday, June 09, 2011 10:54 AM<br><b>To:</b> Wrenches<br><b>Subject:</b> Re: [RE-wrenches] SolarEdge v Enphase</span><o:p></o:p></p><div><p class=MsoNormal>Mark, <o:p></o:p></p><div><p class=MsoNormal>I thought that the SolarEdge reduced the 'string' voltage to 1V per unit/module, reducing the high DC voltage risk factor, until the inverter switch was turned on?<o:p></o:p></p></div><div><p class=MsoNormal><br>The fact that by hitting the "off" switch on the inverter will reduce the potentially high DC voltage to 1V per unit/module could be an advantage from a safety perspective (maintenance, firemen/utility workers)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Labor/time-wise, it is like installing both a microinverter system and a string inverter system together, soooooo....<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>benn<o:p></o:p></p></div><div><p class=MsoNormal><br><span Franklin Gothic Medium style='font-family:"'>DayStar Renewable Energy Inc. </span> <o:p></o:p></p><div><div><p class=MsoNormal><span Franklin Gothic Medium style='font-family:"'><a href="/mc/compose?to=benn@daystarsolar.ca" target="_blank">benn@daystarsolar.ca</a></span><o:p></o:p></p></div><div><p class=MsoNormal><span Franklin Gothic Medium style='font-family:"'>780-906-7807 </span><o:p></o:p></p></div><div><p class=MsoNormal><span Franklin Gothic Medium style='font-family:"'>HAVE A SUNNY DAY </span><o:p></o:p></p></div></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="/mc/compose?to=RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & 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://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</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 participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br><br><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>-----Inline Attachment Follows-----<o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="/mc/compose?to=RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & 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://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><o:p></o:p></p></div></td></tr></table><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><br><br><br>************************************************************************************<br>This footnote confirms that this email message has been scanned by<br>PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses.<br>************************************************************************************<o:p></o:p></span></p></div></DIV>
<DIV STYLE="FONT-FAMILY: Courier New; FONT-SIZE: 9pt">
<P CLASS="MsoNormal" STYLE="MARGIN: 0cm 0cm 0pt"><FONT FACE="Calibri"><SPAN STYLE="COLOR: navy; FONT-SIZE: 10pt">CONFIDENTIALITY NOTICE: This e-mail and its attachments are intended only for the use of the individual or entity who is the intended recipient and may contain information that is privileged, confidential and exempt from disclosure or any type of use under applicable law. If the reader of this e-mail is not the intended recipient, or the employee, agent, or representative responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this e-mail is strictly prohibited. If you have received this e-mail in error, please reply immediately to the sender.</SPAN></FONT> </P><FONT FACE="Calibri"><SPAN STYLE="COLOR: navy; FONT-SIZE: 10pt">
<P CLASS="MsoNormal" STYLE="MARGIN: 0cm 0cm 0pt"><B><SPAN LANG="DE" STYLE="FONT-FAMILY: Webdings; COLOR: green; FONT-SIZE: 13.5pt; mso-ansi-language: DE">P</SPAN></B><SPAN STYLE="COLOR: green; FONT-SIZE: 10pt"> Please think of the environment before printing this email</SPAN><SPAN STYLE="COLOR: #4f81bd"></SPAN></P></SPAN></FONT></DIV><br><br>
<br> <br>************************************************************************************<br>This footnote confirms that this email message has been scanned by<br>PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses.<br>************************************************************************************<br><br>
</BODY></HTML>