The article discusses grid-connected solar PV system, focusing on residential, small-scale, and commercial applications. A grid connected PV system is one where the photovoltaic panels or array are connected to the utility grid through a power inverter unit allowing them to operate in parallel with the electric utility grid. On the other hand, when the user needs electrical power from which the PV solar panels generate, they can take energy from the utility company. It covers system configurations, components, standards such as UL 1741, battery backup options, inverter sizing, and microinverter systems.