Don't know what your solar panel is like but my panels came with 2" or so wide aluminum straps from one side to the other. I drilled these to fit two of the white plastic clamps (with screws to tighten/loosen) used to hold BBQs and the like. I can store the panel folded down or rotated 90* when I want to use it. When it is up I support it with a piece of 1 x 4 cedar with appropriate notches at top and bottom. I also have a light line that goes from the panel to the lower rail although I am not sure it does much.
At first I thought that I would fold the panels down a lot but they are up pretty much all the time unless we are coming into a dock.
Back in the water in Grenada - with new main and #2 and cockpit canvas (Santa came early). Will spend the winter and early spring in the Caribbean and then head to Bermuda and the northeast US. Still trying to decide if we will bring the boat to Canada, either in 2015 or 2016.