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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>When it rains it pours… Just got a call from a competitor’s Sunny Boy owner that wants to add Enphase to an existing system.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Anyway, thanks for the tip on the X MPPT80. This higher voltage might make the wire size small enough to run DC back to the existing battery room. I guess the advantage is that this would eliminate the high battery voltage shutdown issue. On the other hand, this would be less efficient as far as grid selling as I understand it.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal style='line-height:normal'><span style='font-size:12.0pt;font-family:"Cambria","serif";color:#1F497D'>Jason<o:p></o:p></span></p></div><p class=MsoNormal><span style='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 style='line-height:normal'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Gary Willett<br><b>Sent:</b> Tuesday, May 03, 2011 10:40 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] AC Coupling Xantrex XWInverters toEnphaseMicroinverters<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Jason, etal<br><br>Another Schneider/Xantrex option to consider.<br><br>Xantrex will be adding the MPPT 80 to their product line (orderable this month). This new charge controller will allow high voltage strings (600V, as opposed to 150V for current CC). It will also integrate into the existing 4024 inverters via the XAN-Bus for charge control.<o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt;line-height:normal'><span style='font-size:10.0pt'>Regards,<br><br><br>Gary Willett, PE<br>Icarus Engineering / Solar Services LLC<br>NABCEP Certified Solar PV Installer # 031310-246</span><o:p></o:p></p></div><p class=MsoNormal style='line-height:normal'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>On 5/3/2011 9:15 AM, Jason Szumlanski wrote: <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Interesting. It’s only “off-grid” when the grid goes down, which is presumably not often in this case. I think the actual Enphase position is that this “may void warranty.” In practice, I doubt they would a) ask, b) know, and c) actually disallow a warranty claim unless there is system-wide damage that can be directly attributed to the off-grid setup.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>But to be safe I would advise the customer of this issue and make a case for using the Xantrex GT or another brand that does not make the same exception.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Thanks for the info!</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><div><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Cambria","serif";color:#1F497D'>Jason</span><o:p></o:p></p></div><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;border-color:-moz-use-text-color -moz-use-text-color'><p class=MsoNormal><b><span style='font-size:10.0pt;line-height:115%;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;line-height:115%;font-family:"Tahoma","sans-serif"'> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Mark Frye<br><b>Sent:</b> Tuesday, May 03, 2011 9:32 AM<br><b>To:</b> 'RE-wrenches'<br><b>Subject:</b> Re: [RE-wrenches] AC Coupling Xantrex XW Inverters toEnphaseMicroinverters</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif";color:blue'>Jason,</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif";color:blue'>My guess is that this will work just fine.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif";color:blue'>My comment is that according to my conversations with Enphase, they would consider this an "off-grid" application for which they do not warranty their product.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif";color:blue'>If this is the case, it is something your customer should understand upfront.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'> <br></span><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>Mark Frye</span><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman , serif ;","serif"'> <br></span><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>Berkeley Solar Electric Systems</span><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'> <br></span><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>303 Redbud Way</span><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman , serif ;","serif"'> <br></span><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>Nevada City, CA 95959</span><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'> <br></span><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>(530) 401-8024</span><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman , serif ;","serif"'> <br><a href="http://www.berkeleysolar.com/"><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>www.berkeleysolar.com</span></a></span><span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'> </span><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman , serif ;","serif"'> </span><o:p></o:p></p><div><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman , serif ;","serif"'> </span><o:p></o:p></p></div><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'> </span><o:p></o:p></p><div class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;line-height:115%;font-family:"Times New Roman","serif"'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;line-height:115%;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;line-height:115%;font-family:"Tahoma","sans-serif"'> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Jason Szumlanski<br><b>Sent:</b> Tuesday, May 03, 2011 6:18 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] AC Coupling Xantrex XW Inverters to EnphaseMicroinverters</span><o:p></o:p></p><p class=MsoNormal>I read the application note here:<o:p></o:p></p><p class=MsoNormal><a href="http://www.global-download.schneider-electric.com/852577A4005D7372/all/8FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note%28976-0240-01-01_rev-a%29.pdf">http://www.global-download.schneider-electric.com/852577A4005D7372/all/8FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note(976-0240-01-01_rev-a).pdf</a><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>…and I contacted Xantrex to make sure the application note applies to other brands of grid-tie inverters. It does according to the rep I spoke with.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I just wanted to find out if there is any real world experience out there with Enphase and the XW series AC coupled. I have a customer with three XW4024’s in single phase configuration set up as a battery backup only now. He wants to add up to 10kW. I suggested Enphase as an AC coupled system (mainly due to the distance to the proposed array). I’m aware of the pitfalls noted in the application note regarding high limit shutoffs. Any thoughts?<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Cambria","serif"'>Jason Szumlanski</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;line-height:115%;font-family:"Cambria","serif"'>Fafco Solar</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>List sponsored by Home Power magazine<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Options & settings:<o:p></o:p></pre><pre><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>List rules & etiquette:<o:p></o:p></pre><pre><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Check out participant bios:<o:p></o:p></pre><pre><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><o:p></o:p></pre><pre><o:p> </o:p></pre></div></body></html>