I made a simple frame with my 100W panel, essentially just two aluminum bars bolted to the aluminum frame of the panel, and then two attached at top with a screw pivot and a chain between so it would stand like an easel. It easily attaches to a rack if need be with rope, bungies, etc. Makes it easy to put it in the sun with the vehicle in the shade via an extension cord. I actually used aluminum bars from some Harborfreight 60" clamps; my metal provider was closed and it turned out they were probably cheaper than the bar I was gonna buy raw....