Photovoltaic systems generally consist of six individual components: the solar PV array, a charge controller, a battery bank, an inverter, a utility meter, and an electric grid. The correct installation of all of these components determines how efficient the solar panels are. However, a charge controller and battery bank are optional. Even though these two components help you store and, as such, make better use of your generated electricity, they could also increase the total price of the photovoltaic installation. Even though solar PV arrays produce power when they are exposed to sunlight, the other components are required for properly converting, distributing, and storing the energy that has been produced by the solar panels.