In this study, a novel large-scale stand-alone solar/wind/battery hybrid power generation system is designed and constructed. It consists of a photovoltaic (PV) array, a wind energy conversion system (WECS), a battery bank, a bidirectional DC/DC converter, two unidirectional DC/DC converters, a unified maximum power point tracking (MPPT) controller, a control unit, and a DC/AC inverter. The stand-alone solar/wind/battery hybrid system presented in this study combines two renewable resources (solar and wind) with a back-up battery bank used as a standby power source to produce electric energy. Moreover, it maximally converts solar and wind energies into electric energy because it uses a novel fast and highly accurate unified MPPT technique that concurrently tracks the maximum power points of both PV system and WECS. Other works reported in the literature are mostly simulation based works (models), and moreover, there is not any new MPPT consideration in them. It is experimentally verified that the large-scale constructed system is a high-efficient stand-alone solar/wind/battery hybrid power generation system that produces electric energy under different environmental conditions such as cloudy sky, so it can be widely used in remote areas.