•PV systems are like any other electrical power generating systems, except the equipment used to generate the power is different.
•Specific components required, and may include major components such as a DC-AC power inverter,
batteries, auxiliary energy sources, sometimes the specified electrical load (appliances), wiring, surge protection and other hardware.
•Batteries are often used in PV systems for the purpose of storing energy produced
by the PV array during the day, and to supply it to electrical loads as needed (during the night and periods of cloudy weather).