In grid-connected or grid-tied systems, solar energy is used during the day by the system owner. At night, the owner draws on the previously established electricity grid. An addition benefit of the grid-tied system is that the solar system does not need to be sized to meet peak loads— overages can be drawn from the grid

Net metering is an electricity policy for consumers, who own / plan to setup a Renewable Energy facility, which allows them to produce electricity (using wind and solar) for their own use and supply the excess produce to the national grid setting -off units of electricity consumed during Off -peak hours or at times when the production from RE facility is not enough to meet the consumer load. Solar electricity produced by households using rooftop systems is referred to as ‘distributed solar’. This contrasts with centralized generation where solar electricity is produced by a large plant and then distributed to consumers through a power distribution network