Abstract:  This paper proposes a novel high step-up DC-DC converter with coupled-inductor and voltage multiplier circuits. The proposed converter achieves high step-up voltage gain with appropriate duty ratio and low voltage stress on the power switch. Also, the paper demonstrates the design of photovoltaic system and operation at Maximum Power Point Tracking (MPPT) of PV array on its characteristics curve. Furthermore, the energy stored in the leakage inductor of the coupled inductor can be recycled to the load. Different step-up topologies are compared with the proposed high gain step up converter.