Hitachi, Ltd. has announced the start of operations at the newly constructed Matsuyama Battery Energy Storage System (BESS) in Matsuyama City, Ehime Prefecture, Japan. Delivered to Matsuyama Mikan Energy LLC—a joint venture between Shikoku Electric Power Company, Incorporated, and CHC Japan K.K.—the project is Hitachi’s first domestic delivery of a grid energy storage system.
The Matsuyama BESS features an output of 12 MW and a rated capacity of 35.8 MWh. Official operations began on August 1, 2025. The initiative was managed as a fully integrated “One Hitachi” process, covering design, procurement, installation, and testing, utilizing Hitachi Energy’s proven power conversion solution platform.
The system is engineered to balance electricity supply and demand by storing power during high generation periods and supplying it during peak consumption. This enhances the integration of renewable energy sources and supports Japan’s 2050 carbon-neutral target.
Hitachi Group played a key role in system design and project management, while Hitachi Power Solutions handled the commissioning of power distribution equipment. Matsuyama Mikan Energy selected Hitachi’s solution based on its strong track record, reliability, and ability to operate in fluctuating renewable output conditions.
According to Matsuyama Mikan Energy LLC, the facility will store and supply electricity in line with demand, provide balancing power, and maximize renewable energy use. Hitachi plans to continue supporting Japan’s renewable energy expansion and grid stability, with a focus on advanced power conversion technologies for both renewable and hybrid BESS applications.
