In this system, the solar panels are connected to your local utility electrical grid to complement your normal power supply from your utility company. Grid-connected systems consist of:
Solar panels mounted on the roof
An inverter to convert electricity produced by the system from direct current (DC) energy into alternating current (AC) energy
A junction box that connects the solar panel wiring to the breaker panel on the home
A power meter that displays how much power the home produces and uses
A disconnect switch that, for safety reasons, prevents the system from sending power to the grid during power outages (this is called islanding).