Читать книгу The Self-Sufficiency Handbook - Alan Bridgewater - Страница 60

A PV system converts sunlight directly to direct current (DC) electricity. A typical PV cell structure—made up in layers—has a back contact, two silicon layers, an anti-reflecting coating, a contact grid, and an encapsulating surface. As to how it works, it is enough to know that when the structure is bombarded by photons from the rays of the sun, a steady flow of electrons produces a minute amount of electricity in the form of a DC. Certainly, the amount that each cell produces is small, but if you connect a series of cells in the form of a panel, and use an inverter to turn DC to alternating current (AC), then you have a relatively simple and inexpensive energy source.