Zhengmy Solar Panel Mid Clamps 1.06 Inch Solar Panel Bracket Aluminium Mounting Accessories Aluminum Solar Mid Clamp for Solar Panel Mounting Solar Panel Mid Clamp (48 Pack)

There is not much to this product. They are aluminum channels with a screw hole in the middle, for attaching to your mounting frame and ridges on the bottoms of the tabs to help grip the panels and keep them from sliding.This is the second set I have purchased. I bought a set two years ago for when I did my first solar array. I have not had a single issue with the mounting of that first array, the panels are still tightly in place, it has handled 60 mph wind gusts and noting has loosened. I will be building the second array this month and I wanted to stick with what has worked.If you need hold downs like this for your solar setup, then I highly recommend them. JohnnyF

Did the job! Plenty strong for mounting panels onto the roof of my RV for a custom setup.

I used these clamps to attach SunPower solar panels to unistrut on my roof. They were exactly the right size needed, and clamp the panels down securely. Made of good quality aluminum, and plenty beefy enough that you won't be afraid to tighten them down securely.

Well, first thing I did was drill out the hole to a 3/8", as I used them with the large UniStrut. Does not include bolts, but no biggie...I grabbed the 3/8" spring loaded nuts and some 2" 3/8 bolts and it worked perfectly. They all locked down snug without any distortion or bending of the aluminum.

These kept them in place!

solid holding well made clamp.

Exactly what I wanted and needed

As a mechanical design engineer I can tell you that a component is only as strong as its weakest point. So, when a manufacturer supplies a dimensional diagram and that diagram shows the sides to be 3mm, I expect that the sides really are 3mm. However, EVERYTHING in this part has been scaled down (for extra profit?) such that the dimension they imply is 3mm is actually less than 2.5mm. They don't actually show this dimension in the diagram, but that does not mean the dimension is not important. So, doing the math we get: (28 - 22) / 2 = 6 / 2 = 3mm. Even the proportions in their image shows 3mm. Now, perhaps they have done some analysis and shown that with this dimension their part can still support your panels in 100mph winds without any problems. If so, great - show it in your diagram!Other Problem: The unit shown in the advertised image is much deeper that the actual size (much smaller). Because of this you cannot use the information they give you to determine what bolt size to use. (Yes you have to buy your own bolt.)