| PV Explained |
 Photovoltaic energy is the conversion of sunlight into electricity through a photovoltaic (PV) cell, commonly called a solar cell which is a non-mechanical device usually made from silicon alloys. Sunlight is composed of photons, or particles of energy. These photons contain various amounts of energy corresponding to the different wavelengths of the solar spectrum. When photons strike a PVcell they may be absorbed, reflected, or pass right through. Absorbed photons produce energy when electrons in the cell become excited and dislodge from the atoms found in the cell's semiconductor material. As they bounce back and forth, the excited electrons create friction and therefore heat. The solar cell merely takes a percentage of these electrons and directs them to flow in a path. This flow of electrons is, by definition, electricity. The resulting electicity produced by the PV cell is"direct current" and can be used to power "DC" off-grid appliances such as car headlights, flashlights, portable radios, etc. These off-grid appliances however are not connected to the electric power utility grid. To run most appliances found in the home, the DC power must be converted to "alternating current" or "AC", to allow connection via electiric wall sockets. This is done by utilizing an inverter which transforms DC electricity into AC. The inverter's AC output powers the circuit breaker box and the common outlets in your home. Advantages of PV Solar Energy PV Solar energy has the following advantages over conventional energy:
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