Sumitomo Electric will put the next-generation large-scale storage and generation system into practical use. The system has higher generation efficiency than the existing silicon photovoltaic panel, and the installation cost is expected to remain the same. The new system adopts the photovoltaic power generation called concentractor photovoltaic system (CPV) that has two times higher generation efficiency than the silicon photovoltaic panel. The company combined it with redox flow battery whose electrode is hard to deteriorate. The system stores power generated by the photovoltaic generation in the storage battery and discharge it depending on the requirements of the production equipment inside the plant.
Sumitomo Electric decided to install the system in its Yokohama plant. It has the photovoltaic generation with the maximum output of 200 kW and the storage battery with the capacity of five hours of 1 MW. The company says that it is the world’s largest system of this kind. The system is expected to reduce power consumption about 10% in peak period. Total investment is 1 billion yen. Part of the system will start operation in July, and the total system will start operation within the year. The generation cost is expected to be the same between the existing system and the new system.
Sumitomo Denko's micro smart grid demonstration system