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<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:windowtext'>You
got it!<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:windowtext'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:windowtext'>It
boggles my mind to watch the two OB FM60s and see the difference each day and
then to go back and see the data over time. It is a very good argument for
tracking. We have a Durango client that we installed 12 KW GIT tracked and it
is outperforming the expectations of our client too.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:windowtext'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>Dana
Orzel<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>Great
Solar Works, Inc<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>www.solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>E
- dana@solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>V
- 970.626.5253<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>F
- 970.626.4140<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>C
- 970.209.4076<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#4F81BD'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#4F81BD'>I
will be the shift in how the world uses power! - Dana Orzel<o:p></o:p></span></p>
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<p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Allan
Sindelar<br>
<b>Sent:</b> Thursday, December 31, 2009 8:13 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Evergreen<o:p></o:p></span></p>
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<p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'>Dana,<br>
Thank you for this information. I would like to clarify what you wrote. We have
long accepted that trackers may be expected to increase daily output by about
35-40% in the summer and 10-15% in the winter, due to the differences in the
sun's seasonal elevation and the resultant length of the solar day. It sounds
as if you measured the effective increase from approximately summer solstice -
winter solstice and got a 32% gain. You previously got the same gain (33%)
measuring from last winter solstice to summer solstice. This makes sense, as it
averages winter and summer gains over two roughly equal periods, with
variations (summer monsoons, etc.) being within acceptable error. <br>
And whether grid-tied, grid-tied with backup, or off-grid is irrelevant as long
as you can compare and record the outputs of the two otherwise identical
arrays, one tracked and one fixed.<br>
Do I understand this right? If so, it's good real-world data for design
purposes.<br>
Allan<o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><span class=il><b>Allan</b></span><b>
Sindelar</b><span style='font-size:10.0pt'><br>
<a href="mailto:Allan@positiveenergysolar.com" target="_blank"><span class=il>Allan</span>@positiveenergysolar.com</a><br>
NABCEP Certified Photovoltaic Installer<br>
EE98J Journeyman Electrician<br>
<b>Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><br>
<br>
Dana Orzel wrote: <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:14.0pt;
font-family:"Arial","sans-serif";color:#1F497D'>This is for a grid tied with
battery backup Outback system.</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-size:14.0pt;
font-family:"Arial","sans-serif";color:#1F497D'>The 32% increased gain for the
tracker VS. fixed mount production is an average of the last 180 days and I
checked it in the spring for the last 180 days [over the winter] and it was
33%. The 12 – Evergreen 180 watt modules produce about 65 -70% of our
home and office’s electrical requirements.</span><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Arial","sans-serif";
color:#1F497D'>Thanks,</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Arial","sans-serif";
color:#1F497D'>Dana Orzel</span><o:p></o:p></p>
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<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal style='margin-left:.5in'><span style='color:#1F497D'>Dana,</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='color:#1F497D'>That
32% is a very useful number, and it matches with our experience as well. But I
need to verify a couple of assumptions, please:</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='color:#1F497D'>Does
this represent average annual production, rather than peak seasonal? And is it
a grid-tied system?</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='color:#1F497D'>Thanks,</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='color:#1F497D'>Allan</span><o:p></o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='color:#1F497D'> </span><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><span style='font-size:11.0pt;
color:#1F497D'>Allan Sindelar</span><o:p></o:p></p>
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</blockquote>
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