In the Kochi airport in Kerala, India, the water used to wash the solar panels is used to grow fruits and vegetable plants right under the panels and these are harvested and sold.

The plants under the panels also reduces the heat under the panels and thus increases the efficiency of power generation.

This can be a nice way of getting additional income from the land and also tackles the problem of plants growing under the panels.

https://www.newindianexpress.com/states/kerala/2021/dec/13/c...