12pcs Solar Panel Bracket, Aluminum Solar End Clamp PV Mounting Bracket Solar Panel Z Clips for Mounting Solar Panels (30mm)

I did an off grid solar install, using Unistrut to mount the panels to. These brackets worked great, but I had to change the screw out for a longer one, and add a washer to get it to clamp well. I am still giving this a 5 star rating, because they worked and look great, but I was adapting them to my own mounting system.

Good clamp for 30mm solar panels. I switch out the bolts because they were a little short.

Bolts are too short unless you are planning to mount your panels on tinfoil. Bolts aren't long enough to get more than one or two threads hooked up. I wouldn't trust that small amount of threads in the wind. Had to return them for being useless.