No fan of Mother Jones, but this is an interesting idea just for the shade-producing aspect. Anon has read that producing solar power is not that efficient but I imagine some young brain could come up with a way to make it so.
What if Walmart Turned Its Parking Lots Into Solar Farms?
https://www.motherjones.com/environment/2023/04/walmart-supercenter-parking-lots-solar-farms/