Solar and wind energy are renewable sources of energy that can be used for renewable electricity generation. Solar and wind energy sources are intermittent sources of energy. They are not available on demand and backup systems are needed to obtain a reliable supply. By implementing a hybrid system where both the solar and wind plants supplement each other can further enhance their energy harvesting capability, thus improving the supply reliability and overall performance. The aim of this project is to study the feasibility of using a hybrid plant as compared to standalone solar and wind power plants in areas pertaining to the reliability and sustainability of our energy sources. In addition to combining both power sources, the efficiency factors of solar powered systems were studied to further improve the overall performance of the hybrid system. The modeling equations were formulated for sizing simulations at the theoretical development stage. Results obtained from this study includes data indicating factors, such as solar positioning, P V operating temperatures, PV efficiency, solar irradiance and operating locations that affect solar power output of PV arrays and comprehensive sizing data for local implementation, while at the same time, addressing issues pertaining to reliability and sustainability of existing standalone solar power plants. © 2011 Asian Network for Scientific Information.