The Oki Island-Nishinoshima Substation – Hybrid Battery Energy Storage System is a 6,200kW energy storage project located in Nishinoshima Town, Shimane, Japan.

The electro-chemical battery energy storage project uses hybrid as its storage technology. The project was commissioned in 2015.


The Oki Island-Nishinoshima Substation – Hybrid Battery Energy Storage System was developed by Mitsubishi Electric . The project is owned by The Chugoku Electric Power (100%).

The key applications of the project are renewable capacity firming and voltage support.

Contractors involved

GS Yuasa , Mitsubishi Electric, NGK Insulators and The Chugoku Electric Power have delivered the battery energy storage project.

Additional information

This demonstration project was selected under the “2014 Storage Battery Demonstration Project to Promote the Introduction of Renewable Energy on Isolated Islands” of the Ministry of Environment. Through the operation of the hybrid storage battery system, The Chugoku Electric Power Company expects to introduce renewables over 10 MW, the minimum demand of the Oki Islands, by adding up approximately 8 MW of new installations on the existing 3 MW, in the entire Oki Archipelago.

About Mitsubishi Electric

Mitsubishi Electric Corp (Mitsubishi Electric) develops, manufactures, and markets electrical and electronics products. The company offers products such as turbine generators, nuclear power plant, and power electronics equipment, motors, transformers, circuit breakers, gas-insulated switchgear, switch control and display devices, surveillance-system control and security systems, transmission and distribution systems, locomotive and rolling stock electrical equipment, elevators, escalators, building security and management systems, and others. It also provides logistics, real estate, advertising, procurement, finance, and other services. Mitsubishi Electric serves information processing and communications, space development and satellite communications, consumer electronics, industrial technology, energy, transportation, and building equipment sectors. The company has operations in North America, Asia, Europe, Australia, and Middle East regions. Mitsubishi Electric is headquartered in Tokyo, Japan.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.