Opening Ceremony Held for the Battery Energy Storage System at the Eurus Tashirotai Wind Farm

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The completion ceremony was held on November 10 at the Eurus Tashirotai Wind Farm (location: Kazuno City, Akita Prefecture, capacity: 7.65MW) for the battery energy storage system constructed by Eurus Energy Holdings Corporation jointly with Toyota Tsusho Corporation. The facility system was installed after the wind farm’s feed-in tariff (FIT) period ended in February 2023.
Local government officials and construction partners attended the ceremony to pray for the safe operation of the wind farm.

With the completion of the facility, a demonstration experiment commenced on November 1 to further the introduction of renewable energy and stabilization of electricity supply and demand. The goal of the project is to work toward resolving the instability of generation issue, common to renewable energy power sources, by operating the battery energy storage system on-site at the wind farm. In addition, verification will be conducted on methods to maximize the value provided by large-scale wind power plants that have reached the end of their FIT periods and ensuring business continuity as long-term power sources.

Through this demonstration project, Eurus Energy aims to promote activities for realizing a decarbonized and recycling-oriented society through the spread and expansion of renewable energy.

【Outline of Demonstration Project】


for several years beginning November 1, 2023


Eurus Tashirotai Wind Farm (Kazuno City, Akita Prefecture)

Details of the Verification

- Maximizing the value provided and ensuring business continuity of large-scale wind power plants whose FIT periods have expired by operating the battery energy storage system
- Optimal operation of charging and discharging of storage batteries

Outline of Battery Energy Storage System

Facility Scale

output: 1 MW
capacity: 3 MWh


Jointly developed by Tokyo Electric Power Holdings, Inc. and Toyota Motor Corporation