The inexpensive, thin, silvered emergency blankets that can be purchased at outdoors stores have a warning against using them whilst sunbathing as severe burns may be the result. Using that fact, by judiciously rigging them all around the solar panels to reflect & concentrate the sun's rays, they should enhance the generation of electricity. The fact that they also act as downwind sails is just an unforeseen & serendipitous coincidence. They'll be an upwind liability of course, so it's swings & roundabouts! It's how sun tunnels work.
http://www.thesuntunnelcompany.co.uk/
Against the rules? Nah! C'mon,,,,,,,,,,,,, c'mon,,,,,,,,,,,,,,,,,,,,,,,,,,,c'mon.
Wear sunglasses, the sun tunnel interior is blinding as it bounces the light around inside itself.