The global installed capacities of photovoltaic and wind power are growing rapidly. To maintain the quality of grid power and balance between power supply and demand, the integration among photovoltaic, batteries, and fuel cells is necessary. The characteristics of these electric power productions are different. To achieve the balance between power supply and demand, mutual compensation among these power generations, scheduling and power regulation becomes very important. In-situ power monitoring, energy management and power dispatching is vital to power quality and their stability. The power rating and capacity of renewable energy, fuel cells, and storage subsystems are also depending on the variation of load and weather. The photovoltaic and fuel cell, and storage system at a particular scenario are simulated.