<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">I couldn't agree more. This is where Sketchup shines. (pun intended)</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">Image below shown at Latitude 25 with 25 degree tilt to south on west facing roof with 18 degree pitch at 9:00am on 12/21. I don't mind doing the math, but this is far more fun!</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><img src="cid:ii_148a41f0ce3c8586" alt="Inline image 1" style="margin-right:25px"><br></div><br><br><div id="WISESTAMP_SIG_gmail_session" href="http://WISESTAMP_SIG_gmail_session"><div style="font-size:13px;font-family:Verdana,Arial,Helvetica,sans-serif"><div style="margin:0 0 8px 0"><p style="margin:0"><span><span>Jason Szumlanski</span></span></p><p style="margin:0"><span><span></span></span></p><div class="gmail_default" style="font-family:verdana,sans-serif;display:inline">Fafco Solar</div><br><p></p><div style="clear:both"></div></div><img src="https://wisestamp.appspot.com/pixview.gif?p=chrome&v=3.50.0&t=1411502883129&u=d0c775731865b324" width="1" height="1"></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 23, 2014 at 4:04 PM, William Miller <span dir="ltr"><<a href="mailto:william@millersolar.com" target="_blank">william@millersolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">Drake:<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">I suggest you find a CAD solution.  You can study the shading at specific times and some programs will animate.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">William<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><img width="64" height="28" src="cid:image003.jpg@01CFD72E.59EE2340" alt="Gradient Cap_mini"><br>Lic 773985<br><a href="http://www.millersolar.com/" target="_blank"><span style="color:blue">millersolar.com</span></a><br><a href="tel:805-438-5600" value="+18054385600" target="_blank">805-438-5600</a><u></u><u></u></span></p></div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></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 [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Drake<br><b>Sent:</b> Tuesday, September 23, 2014 7:05 AM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] S Facing Mods on E - W slopes<u></u><u></u></span></p></div></div><span><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt">Hello Wrenches,<br><br>We have an installation where we are putting modules on the east and west slopes of a south facing roof. The roof slopes are 18 degrees. The tops and bottoms of the modules will follow the slope of the roof.<br><br>There will be 3 rows of modules. I have heard that the shading is different in this scenario, that the shadows will be triangular and perhaps longer. How can the shading be calculated with this arrangement?  Is there a rule of thumb to follow other than the normal of three times the height difference?<br><br>Thanks,<br><br>Drake<br><br><br></p></span></div></div></blockquote></div></div></div>