Hokkaido Electric Power Co Inc (HEPCO) and Sumitomo Electric Industries (SEI) Ltd announced Dec 25, 2015, that they have completed a large-scale storage battery system at Minamihayakita Transformer Station in Abira-chou, Hokkaido, and started to test the system.

The two companies installed a redox flow battery manufactured by SEI. It has a rated output of 15MW and a capacity of 60MWh and is one of the world's largest redox flow batteries in operation.

In the verification project, which will last for about three years, HEPCO and SEI will verify the performance of the system as a new system for adjusting the output fluctuation of wind and solar power generation facilities and develop optimal control technologies.

Vanadium Redox Flow Battery