Solar power is generated when photons from sunlight strike semiconductor cells and knock electrons free, creating direct current. The two dissimilar semiconductors possess a natural difference in electric potential (voltage), which causes the electrons to flow through the external circuit, supplying power to the load. Solar technologies capture this radiation and turn it into useful forms of energy. Learn about the basics of solar radiation. Panel output depends on cell material, bandgap energy, sun exposure, and inverter type chosen. Most. Solar energy is the energy we get from the sun. It is a renewable source of energy that we can use to generate electricity for our homes, businesses, vehicles, and more.