About Solar Energy Print Page Email Page Photovoltaic (PV) refers to the process of turning light into electricity. PG&E would like to help you understand how PV systems work and how to make them best work for you. Below is a brief description of how PV systems capture energy from the sun and convert it into electric energy. Individual photovoltaic (PV) cells are connected to panels. Solar panels convert sunlight into direct current (DC) electricity. Inverter converts DC into alternating current (AC) for electricity in the home. The utility meter records the net amount of energy generated through the PV system. When you're creating more electricity than you're using, your meter will spin backwards and the excess electricity is sent to the electric grid. This helps to offset the cost of your electricity usage at night or on cloudy days when your system is not producing. Take a Class Solar Education Opportunities Search for solar classes.