You have the solar panels protecting the lower ponds of azolla which don’t like direct sun. The solar panels provide excess electricity and power any machinery used to harvest the azolla. The azolla grows over TEN TIMES as fast as grass or any other plants, so you are cycling it rapidly producing truckloads of green biomass on a monthly basis.

I also added a concept image of a soybean farm with vertical solar fences. The idea being that you can harvest solar energy using very little horizontal space, while the plants still get full mid day sun. These images were generated using AI.