A great deal of effort has been made on installation of photovoltaic generation systems. As a conventional way, the dc power generated by solar panels is converted to ac by a utility interactive inverter just beside the panel. Authors have developed a new installation strategy of them by a dc power line for a streetcar. First, it can reduce the total installation cost because it does not require a lot of the traditional utility interactive inverters. Secondly, it is suitable for collecting and consuming the solar power at the heart of a city because the streetcar carries passengers in day time and its railway is widely spread in the city. In this paper, a power conversion unit which consists of two dc/dc converters bridged by an Electric Double Layer Capacitor is proposed and designed for a sample city. Its performance is also verified by simulation study.