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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For your latitude, you see the same max. average
yearly peak sun regardless of your fixed array tilted at latitude or latitude
-15 degrees.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>See <a
href="http://rredc.nrel.gov/solar/pubs/redbook/PDFs/OH.PDF">http://rredc.nrel.gov/solar/pubs/redbook/PDFs/OH.PDF</a>.
<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Being taught old school we always used latitude,
but now I use latitude – 5 degrees for optimal fixed tilt.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Drake Chamberlin<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, January 04, 2010
8:30 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">RE-wrenches</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> [<st1:PersonName w:st="on">RE-wrenches</st1:PersonName>]
Best angle - direct grid tie</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hello Wrenches,<br>
<br>
My Solar Pathfinder Assistant (SPA) claims that the optimum tilt angle for the
solar modules is latitude. I'm skeptical. The system being designed
is a direct grid tie, ground mount. <br>
<br>
It seems to me that an angle of latitude will give a balanced angle for both
summer and winter charging. Since there is far less energy available in
the winter, is this balance really the best. Also, a flatter angle in the
summer should gain more hours of sun, since the sun goes N of the E-W
axis. <br>
<br>
With ballasted systems, the 15 degree angle is supposed to work just fine, due
to better summer charging. Does anyone have an answer to what really is
the optimum tilt angle for a direct grid tie system? Is the SPA geared
toward off grid systems, or is latitude really the best? <br>
<br>
Thank you and best wishes for the New Year, <br>
<br>
<o:p></o:p></span></font></p>
<x-sigsep>
<p></x-sigsep><font size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'>Drake Chamberlin<br>
<st1:City w:st="on"><st1:place w:st="on">Athens</st1:place></st1:City> Electric<br>
OH License 44810<br>
CO License 3773<br>
NABCEP </span></font><font size=1 color=blue><span style='font-size:7.5pt;
color:blue'>TM </span></font><font color=blue><span style='color:blue'>Certified
PV Installer <br>
Office - 740-448-7328<br>
<st1:City w:st="on"><st1:place w:st="on">Mobile</st1:place></st1:City> -
740-856-9648 </span></font><o:p></o:p></p>
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