PVstudent - Solar Education Resource
RSS Follow Become a Fan

Delivered by FeedBurner

Recent Posts

Advancement and Development of Electricity and Technology
Building Integrated PV
Bypass diodes
Determining low temperature that caused the inverter to go over voltage
Another NABCEP PVIP Certificate in the mail!

Most Popular Posts

Feeder PV Connections 705.12(D)(2)(1)(b)
Crimping MC4 Connectors without the tool
PV Temperature coeficcients in V/C, mV/C and %/C with conversion examples
NEC 310.15(A)(2) Exception, 10% or 10 feet or less for sizing conductors
Converting kWh to pounds of CO2


Advanced PV Course
NABCEP PV Installation Professional Exam Prep Course
NABCEP PV Technical Sales Exam Study Group (which will evolve into a full course)
PV Boot Camp and NABCEP Entry Level Exam Prep Course
powered by

HeatSpring PV Course Blog

Ground Mount Tilt Angle vs. Hold Depth

From HeatSpring.com PV Boot Camp


Using Ironridge's ground mount Design Assistant, an array tilt angle of 35° (close to local latitude of 38°) the minimum hole depth is 7.5' but with tilt angle of 15°, the hole depth is just 5'.
Is it cost effective to dig a deeper hole, using more concrete in able to use latitude as the tilt angle?


That is a question with many answers and some of them do not have to do with the cost of the concrete.
Many people tilt at an angle less than optimal, so that they have less inter-row shading and can fit more in a smaller space. Also lower tilt angles work better in the summer when electricity is often more valuable. Another thing is that some people like the aesthetics of a lower slope.
With a steeper tilt angle, there are more wind forces at work on the array and concrete is required. The question here is how much does the deeper hole filled with concrete cost vs. the extra kWh produced from the PV? How efficient is your PV? If the PV was expensive, it makes more sense throwing money into a hole (concrete) in order to squeeze all you could out of that PV. If the PV is less expansive, like it is now compared to 10 years ago, then the lower tilt angle starts to make sense.
Personally, I would probably look at how much space I had and wanted to use. If I want my array compact, I would look more into the lower tilt angle.
I am at latitude 38 myself right now in the San Francisco Bay Area. So is Athens Greece. We should all get together on the 38th day of the year.
Or perhaps you should use a human pile driver and forget the concrete, like this:
Sean White

0 Comments to Ground Mount Tilt Angle vs. Hold Depth:

Comments RSS

Add a Comment

Your Name:
Email Address: (Required)
Make your text bigger, bold, italic and more with HTML tags. We'll show you how.
Post Comment
Website Builder provided by  Vistaprint