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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"'>Yes, I know that that screen shot was only a moment in time. Here it’s only March and clipping is already taking place. Imagine what kind of clipping is going to take place at higher irradiance levels later in the year. Yes, the monitoring program cannot as of now quantify what kind of harvesting losses would take place over time compared to an identical array using Enphase micros. But the principle remains unchallengeable: not allowing for maximum kWh harvesting is plain and simple NOT the best design strategy.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>“Some clipping is good”? You’ve got to be joking. Not being able to harvest usable solar energy is good? What kind of optimal design philosophy is that?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>As module outputs have been going up, Enphase has a vested interest in continuing to move product with little regard for the harvestable energy being essentially lost. Using larger micros that reduce or eliminate that clipping is prima facie a good thing if one cares about maximizing kWh harvest. As more micro products come on the product with higher outputs than the venerable and solid M215, Enphase risks being left behind and losing market share. I for one find that “white paper” overly self-serving.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>marco<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-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Nick Soleil<br><b>Sent:</b> Thursday, March 21, 2013 8:04 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] P1 micro performance<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><p class=MsoNormal>Good points David, we are in peak season for inverters to be limiting power. <br><br>Marco, your diagram shows that the modules are only overproducing the Enphase M215's output of 225 watts for a single 15 minute period during the day. That would only equate to about 3 watt-hours of lost power on a day when the modules are producing more than 1000 watt-hours. That tends to be in agreement with our study, which can be viewed at; <a href="http://enphase.com/wp-uploads/enphase.com/2011/12/Enphase_White_Paper_Module_Rightsizing.pdf">http://enphase.com/wp-uploads/enphase.com/2011/12/Enphase_White_Paper_Module_Rightsizing.pdf</a>. <o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>Averaged across the entire year, this loss of power would total less than 0.1%, and would be less than 0.2% for a 265 watt module. Keep in mind that with degradation accounted for, you will see even less limiting in future years. I'd encourage Wrenches to look closely at the attached document. It is based upon real system production data from Enlighten compared against actual irradiance data.<br><br>Most analysts would agree that some "clipping" is good. You will have a better return on your investment when your DC to AC ratio is greater than one. In this case, bigger is better.<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>