A grid-connected photovoltaic power system, or grid-connected PV power system is an electricity generating solar PV power system that is connected to the utility grid. A grid-connected PV system consists of solar panels, one or several inverters, a power conditioning unit and grid connection equipment..
On Grid Solar Power Systems are connected to the mains power supply just like a regular home. This means that mains power can still be used any time your solar panels generate less electricity than is needed, e.g. at night.
In many countries, solar homes can also capitalize on times when the panels generate more electricity than is needed by selling the surplus back to the electricity company -usually at a nice profit.