The optimization results including the costs and reliability indices in two scenarios are presented in Tables 3. According to Table 3, PFWHS costs and reliability indices rate in second scenario is more than first scenario due to considering the components availability and also the PFWHS optimal sizing in first and second scenario is presented in Table 4. It is clear that the storage system due to complete availability of component, especially PV and Wind, less energy is generated in first scenario compared to second scenario considering components availability and uncertainty in wind speed and solar irradiance. Also the curve of OCE versus the reliability of PFWHS in first and second scenario is depicted in Fig. 6. As shown as in Fig. 6, the reliability rate of PFWHS is increased by increasing the OCE rate and vice versa, also the OCE rate in second scenario is more than first scenario.