Put the solar panel on top of it at an angle. The roof will keep radiating heat, and some of it will hit the bottom of solar panel, but that's probably ok. Mayb

Put the solar panel on top of it at an angle. The roof will keep radiating heat, and some of it will hit the bottom of solar panel, but that's probably ok. Maybe can put reflective material on the bottom of the solar panel so it bounces around until it finally escapes.