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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=blue><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Direct Power & Water (DPW) had SW175’s in the fall of 2010. Or, the Schuco MPE 180 MS05 is single crystal module with similar voltage numbers as the SW.<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'>Dave<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>David Palumbo<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Independent Power LLC <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>462 Solar Way Drive<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hyde Park, VT 05655<b><o:p></o:p></b></span></p><p class=MsoNormal><b><i><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>www.independentpowerllc.com <o:p></o:p></span></i></b></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>NABCEP Certified PV Installer<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Vermont Solar Partner<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>23 Years Experience, (802) 888-7194 <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'><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><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>Peter Parrish<br><b>Sent:</b> Saturday, January 15, 2011 3:33 PM<br><b>To:</b> 'RE-wrenches'<br><b>Subject:</b> Re: [RE-wrenches] Matching modules into Xantrex GT<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Here is the way I figure this kind of problem out.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l3 level1 lfo10'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><span style='mso-list:Ignore'>(1)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Old modules. Figure out the number of cells and the cell size. For example 72 cells, 100 mm (4”) square.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l3 level1 lfo10'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><span style='mso-list:Ignore'>(2)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>New module. If you can, find a module with the same number of modules and same cell size.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l3 level1 lfo10'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><span style='mso-list:Ignore'>(3)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Make sure were are talking the same PV Cell material (crystalline Si, poly or single)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>To first order, the two modules should have nearly the same characteristics: Voc, Isc, Vmp and Imp. You should be able to build a new string with the same number of modules. Caveat: older modules will show lower Isc due to the fact that there have been significant advances in surface treatment (AR coating, surface etching) and in the case of poly special treatment of the wafer (heat treatment plus H2 gas?).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Failing that, try to match up total number of cells in the string, keeping cell size the same. I don’t have the SW data at hand but it doesn’t look like they are a good match.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Don’t give up on SW175s. There may be someone who has some lying around or the precursor Shell Solar 175-PC. You might have to fixture them with new connectors. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><!--[if gte vml 1]><v:shape id="_x0000_s1026" style='position:absolute;margin-left:0;margin-top:0;width:50pt;height:50pt;z-index:251657728;visibility:hidden' coordsize="21600,21600" o:spt="100" o:preferrelative="t" adj="0,,0" path="" filled="f">
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</v:shape><![endif]-->- Peter<o:p></o:p></span></p><p><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Peter T. Parrish, Ph.D., President<br>California Solar Engineering, Inc.<br>820 Cynthia Ave., Los Angeles, CA 90065<br>CA Lic. 854779, NABCEP Cert. 031806-26<br><a href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a> <br>Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 <o:p></o:p></span></p><p><span style='color:navy'> </span><o:p></o:p></p></div><div><div class=MsoNormal align=center style='text-align:center'><hr size=2 width="100%" align=center></div><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>William Miller<br><b>Sent:</b> Saturday, January 15, 2011 10:51 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] Matching modules into Xantrex GT</span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Friends:<br><br>I have a client with a Xantrex GT2.8 inverter. Feeding it are 8 Solar World SW175 modules. This is half the modules that this inverter can handle. The client wants to realize the full potential of this inverter. Adding 8 additional SW175 modules would be ideal, but they are no longer manufactured.<br><br>I need to find a group of modules to match the 175s. I am contemplating 9 SW240s. The specifications for this match up are below. I imagine the IV curves are similar for these two modules as they are the same chemistry and the same manufacturer.<br><br> 8-SW175 9-SW240<br>Voc 403 382<br>Vmp 283 275<br>Imp 4.95 7.87<br>Pcsi 1252 1715<br>Ptotal 2.967<br><br>Might this match be close enough? I know this over-powers the inverter slightly. I imagine that the Xantrex will self regulate this very rare over wattage condition.<br><br>Comments?<br><br>William Miller<br><br><br><br><br><o:p></o:p></p><p><u>Please note new e-mail address and domain:<br><br></u>William Miller <br>Miller Solar<br>Voice :805-438-5600<br>email: william@millersolar.com<br><a href="http://millersolar.com/">http://millersolar.com<br></a>License No. C-10-773985<o:p></o:p></p></div></body></html>