Screw each stanchion through the roof and into a roof rafter.
Install solar panel on roof rack.
Have a helper press a piece of wood up from the inside of the shell to brace it against the pressure of the drill.
Mark the position of these holes on the solar array and then drill a hole through the board not the solar panels that is going to be big enough to run a bolt down through.
Drill a slightly larger 1 32 hole than your bolt or screw size.
So are thousands of other diyers.
Also be sure the stanchion flashing fits beneath the roof shingles to prevent leaks.
Now find a bolt that can be screwed into the attachment point on the roof rack of your car and equip it with a big fat washer.
Learn about diy solar.
Installing the solar panels is done by using unistrut cone connectors 1 4 inch or 3 8 inch to attach to the slotted steel l brackets.
It was tough to get the bolt through several layers of washer shell gasket rack without a little wiggle room.
200w of solar panels on the roof rack.