DIY Unistrut Solar Panel Rail Mid and End Clamps! 

Good idea! Keep up the good work!!!

Great idea. Simple, cheap and effective. I've used the Signature Solar claps before and I was thinking of using some unistrut in a particular place instead of the 6" mini rail they sell also. I'll still use the flashing, just replace the mini rail with a long length of unistrut. They sell two different thread adapters for the unistrut but a washer will be much cheaper I'm sure. The clamps also come in different heights for different thickness panels.

Just an additional idea. Put a spring between the nut and clamp/washer. Works greats for the ones between the panels to keep the clamps up and not fall over when you try to position the 2nd panel.

I just used the hokey washer, 3/4” gray pvc spacer way on my 47kWp.