The Sun is a tremendous source of energy.
Each year, the amount of solar energy received by the Earth corresponds to about 7,000 times that consumed by humankind. It arrives in luminous form (light), conveyed by photons generated by the nuclear fusion of hydrogen within the Sun.
Sunlight has the potential to supply all our energy needs — provided that it is converted efficiently and economically. Hence the development of two main avenues for the exploitation of solar energy, namely photovoltaic and thermal technology. While the latter relies directly on the heat created by the Sun’s radiation, the former — possibly the most familiar to the general public — converts solar radiation into electricity.