In this chapter, we have developed a simulation model to carry out an analysis for optimizing the dimensions of photovoltaic (PV)–wind and battery systems for a hybrid unit in a place, the use of a distribution of load, wind speeds, and installation . The developed module strategies involve the received information inclusive of the wind speed, sun insolation, load distribution, type of load (commercial or industrial or village), type of supply (alternating current or direct current), type of backup components (fuel cell or diesel generator set), maximum annual capacity shortage constraints (0% or 5%), wind and PV device parameters like latitude and longitude of location, lifetime of PV panel, de-rating factor, slope of PV panel, azimuth angle, ground reflections and hub height, rated speed, and rotor diameter of wind turbine system. The energy generating capacities of PV–wind and battery systems for every second for a location are computed, and we recommend the combination of the hybrid system. The optimal size of the hybrid system is determined based on the calculated values of initial cost, operating cost, and cost of energy.