Is it difficult to maintain solar panels? How To clean solar panels?

No, it’s not complicated at all. In reality, it is simpler than servicing indoor appliances. Solar panels need either good rain or pollen, leaves, dust, and other contaminants to be rinsed.

Whoever obstructs the panels will make energy production less efficient.

You will also need to cut branches that could compete with your solar panels collecting UV Ray’s from the sun. That is not that hard.