# How to calculate wind impact to DIY solar panel array frame?

I'm trying to figure out the calculation for amount of force against the poles/ground I have going up out of the ground, to hold an array of 3 solar panels (9ft by 5ft combined roughly), where each panel is 40lbs, and frame material not 100% defined but likely wood/metal combo, with concrete poured to anchor to (but, again, I'm not sure how much force will be against the panels from wind, versus how much I need secured to the ground).

Highest wind here recorded was 111mph with 123mph gust wind. I read solar panels can handle 140mph winds, however, I need to figure out a strong enough frame for the 3 panels in the wind.

How would I approach calculating this? I have no wind force calculation experience, and I didn't find immediately clear math to solve for it on google.

• The answer to this will depend on your geographical region and which design code you need to build according to. Usually a region will have standard wind pressures you need to design to and they will be based on probability of experiencing that pressure in a given time period. From there you pretty much design it the same way you would a sign, a billboard or fence. Part of your design you will also need to know the nature of the soil you are drilling into. You probably wont be worried about vertical load, but you may wind up needing to resist a lot of horizontal load. Commented Jun 28, 2022 at 23:14
• Instead of duplicating questions, improve the first one: engineering.stackexchange.com/q/51525/10902 Commented Jun 29, 2022 at 8:17
• Commented Jun 29, 2022 at 8:18
• Commented Jun 29, 2022 at 21:40