A grid-connected solar PV system is one of very simple design.
There are three (3) major components installed :-
Most suburban homes in Australia are connected into the electricity grid network, which uses alternating current electricity (240VAC). However, the electricity generated by solar panels is direct current (DC). That means grid-connected (GC) solar PV systems need an additional inverter to efficiently convert the solar DC electricity into AC electricity that is suitable for ordinary household needs.
During the day, houses with solar systems use the solar power first before sourcing electricity from the grid. At night, when the panels are not producing electricity, power is supplied from the existing electricity grid.