If the demand for power from the facility is greater than the power provided by thesolar system, the switchgear will draw the additional power required from the utility feeds.

Circuit breakers are made in varying sizes, from small devices that protect an individualhousehold appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.

Switchgear is any of several devices used for opening and closing electric circuits, especiallythose that pass high currents.