Tokyo, Japan --- (METERING.COM) --- August 7, 2013 - A large scale battery storage demonstration is to be undertaken in Japan by Tohoku Electric Power Co., Inc., Hokkaido Electric Power Co., Inc. and Sumitomo Electric Industries, Ltd., the country’s Ministry of Economy, Trade and Industry (METI) has announced.

The aim is to examine the installation and utilization of large scale storage batteries in electricity grid substations in managing the integration of renewable energies, as well as to develop the technology to optimally control and manage such batteries.

The demonstration has two themes – lithium-ion batteries and redox flow batteries – and is focused on measures for dealing with frequency variation and for adjusting the supply-demand balance in cases of demand decrease with the integration of variable wind and PV power generation.

Tohoku Electric Power Co., Inc. will install a 20 MWh Li-ion battery in its Nishisendai substation in Sendai, Miyagi Prefecture, in northeastern Japan.

Hokkaido Electric Power Co., Inc and Sumitomo Electric Industries, Ltd. will install a 60 MWh redox flow battery in the Minamihayakita substation on the island of Hokkaido in the northern prefecture. These companies will also develop the battery control and management technology.

In both themes the aim is to boost the capacity of the supply-demand adjustment function by around 10% and for the companies to expand the introduction of renewable energy in their respective supply areas.

This project is Japan’s first effort to introduce large scale storage batteries in electricity grids, and METI aims to rapidly acquire the necessary technology and know-how so as to utilize such batteries in electricity grids, the ministry said in a statement.