Abstract
In the paper the small decentralized system is proposed as a hybrid power generating system with a fuel cell and a solar panel. The solar panel is set up on the roof of the system. In the daytime electricity is generated by the sunlight, and water is separated into hydrogen and oxygen by the remained electricity. In the nighttime electricity is generated by the fuel cell with the hydrogen and the oxygen. The hybrid system is proposed to be applied to traffic signals. The signal system is advantageous at the time of the power failure due to emergency such as the earthquake and so on.
