Holt,
Feedback re the low tilt angle: Go for it, you're good.
Re wind loading: check out UniRac's Code Compliant Installation Manual,
http://www.unirac.com/pdf/ii227.pdf, especially pages 3-9.
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.
No experience with Enphase.
Allan
hol...@sbcglobal.net wrote:
Searching for opinions.....is this "over
design"?
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?
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?
Lastly, what is a good avg. target derate
factor for Enphase inverters (real world)?
Holt E. Kelly
Holtek Fireplace & Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com
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