Abstract: This paper introduces grid-connected PV system to provide electricity for loads fractions of the governmental building in "Qena Al-Gadida" through two plans with different prices of electricity according to consumption rates. The first plan assuming the price of electricity purchased from the grid is equal to the price paid by the utility for electricity sold to the grid (sellback price). The second plan assumes that the sellback price is higher than the grid power price. HOMER package used for simulation.

Keywords: Photovoltaic, Modules, Inverter, NPC, COE, Grid, Sale, Sellback, Electricity, Simulation, Load, Consumption, Homer, Kwh, Prices, Connected, Temperature, Governmental, Buildings, City, Qena Al-Gadida, NUCA, Diesel.