I won't load you with scientific terms and will bring you a normal understanding of what solar energy is.
This is the sunlight heat which is collected by special equipment/devices which, in turn, convert this heat into electricity.
The solar energy is a natural energy, not an artificial one. It needs no chemical or mineral resources for generating electricity. Therefore it's harmless for the environment and our health. It would be so elementary if it wasn't so sophisticated.
The point is that the devices and equipment used for converting the solar energy are too much expensive. Besides, one device can't give a lot of electricity. However, today Europeans tend to implement them wherever possible.
What do you think and know about these devices?