Rooftop Solar Plants need not be just Solar panels, a few pillars, and rafters to support the solar panels. With a little effort and innovation, Rooftop solar power plants can be 

1.Visually pleasing.

2. A beautiful vegetable garden (Growing plants below the Solar panels is technically called agri-Voltaics

3. A green space to enjoy the openness of the roof.

4. A micro-local hotspot for bio-diversity.

Some vegetables like cauliflower grow easily under partial sunlight below the panels.

The Pillars can be used as support for growing creepers like Bitter gourd, Ridge gourd, etc

The solar panels together with the garden can reduce the temperature inside the building significantly.