Grid connected photovoltaic system consists of solar panels, inverters and mounting structure. Conversion of current flowing from the solar panels into alternating current present in the electrical outlets is work of inverter. This current is used by the household. Excess electricity is resold to the public network.
Advantage of the resulting network is connected to the public network. Availability of electricity is without limitation, because during night current flows from the public network. Lack of batteries makes it cheaper solution. Electricity can be sold at higher rates guaranteed for photovoltaics. It makes it a good long-term investment.