Using the smaller panels as sun shades is a good idea. I have been considering this as a way to augment my 145W roof mount panels with the little 15W Harbor Fright panels, attaching them to the roof side and swinging up on the driver's side. Of course, parking direction will determine their effectiveness. They could also be removed to use remotely, when parking in the shade, and only needing to keep the small devices charged. Be a good way to top off the Jumper Pack.