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Holt,<br>
Feedback re the low tilt angle: Go for it, you're good.<br>
<br>
Re wind loading: check out UniRac's Code Compliant Installation Manual,
<a class="moz-txt-link-freetext" href="http://www.unirac.com/pdf/ii227.pdf">http://www.unirac.com/pdf/ii227.pdf</a>, especially pages 3-9.<br>
<br>
Less wind loading is one of the main reasons for going with a lower
tilt angle. Another is closer module row spacing (at 3X height RoT)
without inter-row shading.<br>
<br>
No experience with Enphase.<br>
Allan<br>
<br>
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<p class="MsoNormal" style=""><span class="il"><b style="">Allan</b></span><b
style=""> Sindelar</b><span style="font-size: 10pt;"><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 style="">Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b style="">505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span></p>
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<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:holtek@sbcglobal.net">holtek@sbcglobal.net</a> wrote:
<blockquote cite="mid:50CF01023BB74DA1948CA536CE327489@HoltPC"
type="cite">
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<div><font face="Calibri">Searching for opinions.....is this "over
design"?</font></div>
<div><font face="Calibri">Designing small system (2.35kW). Customer
uses gas for heating. Typical A/C unit. I was thinking of biasing the
tilt to summer production for greater offset of summer demand (lat
31.6, proposing 18). No net metering in this part of the world.
PVwatts shows a drop of 2% /yr. in production , 5% higher production
for A/C months. Feedback?</font></div>
<div> </div>
<div><font face="Calibri"> Also, this array will go on a carport. I
understand that windloading is actually greater for an open structure
than one with walls (another reason for lower tilt) - is there any one
that can direct me to data on finding out how much more? </font></div>
<div> </div>
<div><font face="Calibri">Lastly, what is a good avg. target derate
factor for Enphase inverters (real world)?</font></div>
<div> </div>
<div><font size="2">Holt E. Kelly<br>
Holtek Fireplace & Solar Products<br>
500 Jewell Dr.<br>
Waco TX. 76712<br>
254-751-9111<br>
<a moz-do-not-send="true" href="http://www.holteksolar.com">www.holteksolar.com</a></font></div>
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