a grid-connected photovoltaic (pv) power system is electricity generating solar pv system that is connected to the utility grid. When conditions are right, the grid connected pv system supplies the excess power, beyond consumption by the connected load to the utility grid.salient features a grid-connected pv system will reduce the power bill as the surplus units supplied to the grid are deducted in the electricity bill supplied by local electricity supplier. on-grid systems are less expensive as compared to off-grid system as they don’t require battery.