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Emerging of hybrid systems comprising of different renewable energy sources and storages needs integrated power converter topologies to provide the possibility of power delivery between renewable energy sources and the electrical grid. In this paper, positive Buck-Boost (BB) converter topology is selected and modified to a multi-input (MI) topology that could be controlled suitably by sliding mode control (SMC) technique. The methodology is based on controlling a MI single output system. Within the SMC method, besides robust dynamic behavior of the closed-loop system, power sharing between different sources of energy is achieved. Simulation results show powerful characteristics of sliding mode technique such as robustness in terms of dynamic stability of the converter.