<font size=2 face="sans-serif">I did a slide on the effect of North facing
modules. For even a fairly aggressive rotation North as shown, the
effect is "only" a 50% reduction.</font>
<br>
<br><font size=2 face="sans-serif">The questions of whether or not to do
it, are,</font>
<br>
<br><font size=2 face="sans-serif">- is the mounting structure simpler,
lower cost</font>
<br><font size=2 face="sans-serif">- security against wind</font>
<br><font size=2 face="sans-serif">- can I put a larger array on the roof
(typically yes, if you make back to back pyramid shaped structures)</font>
<br><font size=2 face="sans-serif">- overall, what is the cost versus benefit</font>
<br><img src=cid:_1_0C8BA1DC0C8B99880052BC8F88257E90>
<br><font size=2 face="sans-serif">JARMO<br>
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Jarmo Venalainen</b> | </font><font size=1 color=#008000 face="Arial"><b>
Schneider Electric </b></font><font size=1 face="Arial"><b> | Xantrex
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<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">"Peter Parrish" <peter.parrish@calsolareng.com></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">"'RE-wrenches'" <re-wrenches@lists.re-wrenches.org>,
</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">07/28/2015 12:22 AM</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">[RE-wrenches] Using the North Facing
Roof</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Sent by:</font>
<td><font size=1 face="sans-serif">"RE-wrenches" <re-wrenches-bounces@lists.re-wrenches.org></font></table>
<br>
<hr noshade>
<br>
<br>
<br><font size=2 color=#004080 face="Calibri">I recently read a short piece
that caught me up short, and I quote:<br>
</font>
<br><font size=2 color=#004080 face="Calibri">“The fast dropping cost
of solar, while a huge boon to the adoption of solar PV, has counter-intuitively
altered design parameters. No longer is the north-facing roof considered
unusable because limited application in less-than optimal orientations
can still show a positive net benefit. Arrays are thus designed now with
elements or sub-arrays in these locations, increasing overall kW installation
while reducing the energy production per capacity installed. This might
have been anticipated based on sheer economic analysis from a users perspective,
but so long has solar been expensive that these less optimal orientations
were never seriously considered.”</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">I doubt that the individual
who wrote this piece came to these conclusions him/herself. Does anyone
know of a recent article that argued this perspective? Is this an emerging
design practice? If so, I’d like to know more about it. </font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">-
Peter </font>
<br><font size=2 color=#004080 face="Calibri"> </font>
<br><font size=2 color=#004080 face="Calibri">Peter T. Parrish, Ph.D.</font>
<br><font size=2 color=#004080 face="Calibri">President, SolarGnosis</font>
<br><font size=2 color=#004080 face="Calibri">1107 Fair Oaks Ave., Suite
351</font>
<br><font size=2 color=#004080 face="Calibri">South Pasadena, CA 91030</font>
<br><font size=2 color=#004080 face="Calibri">(323) 839-6108</font>
<br><font size=2 color=#004080 face="Calibri">petertor@pobox.com</font>
<br><font size=2 color=#004080 face="Calibri"> </font>
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