The PVC frame would be dimensioned to match the holes on the backside of the panels. And bolted to (2) long vertical steel angle iron rails.
Since the PVC is going to be in the shade of the panels, I'm not worried that it's going to start breaking down during my lifetime.
I will have the PVC Tees and 90deg elbows sticking out on each side, to provide some bump protection.
Maybe I can paint the exposed parts to sun-screen them.?.
Perhaps later on, I can use the PVC frame to experiment with other types of trackers.
Picture this Leaning Rotator mount with 4 panels..