This paper presents a design scheme of controlling/optimization system for hybrid solar — wind renewable energy sources, its transmission, charging — discharging battery energy storage system and connectivity to the grid distribution. The voltage base self — intervention technique is employed for hybrid solar — wind renewable energy sources and battery energy storage system. The hierarchical switching control process technique is employed to switch, control, manage — supervise, optimize the hybrid solar — wind renewable energy sources and battery energy storage system charging — discharging process. Therefore, this paper's aims and objectives are to use the modern power electronics technology to integrate all the subsystem together to perform control and optimization. The simulation results of the proposed design scheme using the PIC Microcontroller shows controlling the hybrid solar — wind renewable energy sources intelligently perform the switching between the hybrid solar — wind renewable energy sources. Also, the hierarchical switching control process technique which act as the expert system effectively manage to optimize the hybrid solar — wind renewable energy sources, battery energy storage system charging — discharging process and load supply output. Simulation results presented successfully demonstrated the design scheme of controlling/optimization using voltage base self — intervention technique and hierarchical switching control process algorithm for hybrid solar — wind renewable energy sources and battery energy storages system.