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<DIV><FONT size=2 face=Arial>William,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Kyocera has info and diagrams about shading at <A
href="http://www.google.com/imgres?imgurl=http://www.kyocerasolar.com/images/SI_shading2.gif&imgrefurl=http://www.kyocerasolar.com/solar/modules.html&usg=__yf6KqK_dUhhzxPEz7cw-kfYIu0E=&h=284&w=465&sz=9&hl=en&start=16&itbs=1&tbnid=6DoggLWqADx8LM:&tbnh=78&tbnw=128&prev=/images%3Fq%3Dpv%2Bshading%26hl%3Den%26sa%3DG%26gbv%3D2%26tbs%3Disch:1">http://www.google.com/imgres?imgurl=http://www.kyocerasolar.com/images/SI_shading2.gif&imgrefurl=http://www.kyocerasolar.com/solar/modules.html&usg=__yf6KqK_dUhhzxPEz7cw-kfYIu0E=&h=284&w=465&sz=9&hl=en&start=16&itbs=1&tbnid=6DoggLWqADx8LM:&tbnh=78&tbnw=128&prev=/images%3Fq%3Dpv%2Bshading%26hl%3Den%26sa%3DG%26gbv%3D2%26tbs%3Disch:1</A></FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>(if this long address doesn't work, then go to
google images for pv shading)</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Premier Power's brochure at <A
href="http://www.docstoc.com/docs/29007477/Residential-Solar-Power/">http://www.docstoc.com/docs/29007477/Residential-Solar-Power/</A> page
6 shows similar images and says shading the bottom row of a portrait module
knocks out 100% of the module's output.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Joel Davidson</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=william@millersolar.com href="mailto:william@millersolar.com">William
Miller</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, April 22, 2010 8:40
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] Inter row shading:
Portrait V landscape</DIV>
<DIV><BR></DIV>Friends:<BR><BR>99% of the time, we install modules in portrait
mode. We find ourselves installing a set in landscape with some short
inter-row spacing, due to roof vents. We are using Solarworld SW230
modules.<BR><BR>It is my understanding that shading the short edge of this
type of module is much more detrimental to the output than shading a long
edge. This is because of the manner in which the cells within the module
are arranged in series. I understand that one string is on the bottom
half of a module and the other on the top half of a module in the landscape
orientation. In order for the module to cease power production, you have
to shade at least one cell from each of the two internal strings.
Therefore, you need to shade more than half of a module in the landscape mode
before the module before the output declines drastically.<BR><BR>Is my
understanding here correct? I will be testing this tomorrow if weather
permits.<BR><BR>Thanks in advance.<BR><BR>William Miller<BR><BR><BR><X-SIGSEP>
<P></X-SIGSEP><FONT size=3><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/"
eudora="autourl">http://millersolar.com<BR></A>License No.
C-10-773985<BR></FONT>
<P>
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