Green Battery starts construction of grid-scale battery storage project in Yamanashi
Power & EnergyYamanashipower-gridrenewable-energy
Green Battery Co., Ltd. has begun construction of a 2MW/8MWh grid-connected battery storage facility in Otsuki City, Yamanashi Prefecture, aimed at providing balancing capacity for the power grid amid growing renewable energy adoption. The facility is expected to begin operations in August 2026, participating in Japan's balancing, wholesale, and capacity markets.
GS Yuasa will develop a new manufacturing plant for stationary energy storage systems in Ibaraki Prefecture under its Ministry of Economy, Trade and Industry-approved battery supply security plan. The facility is scheduled to begin supply in October 2028, with production spanning domestically made lithium-ion battery cells through control systems.
Kansai Electric has begun commercial operation of the Borkum Riffgrund 3 offshore wind power project in Germany, in which it participates alongside Gremont Partners and other investors. The offshore facility comprises 83 wind turbines located approximately 70 km from the coast, with total capacity of 913 MW.
Reene Energy and Appletree will jointly develop a grid-connected battery storage facility in Kakegawa, Shizuoka, to store surplus renewable electricity and discharge it during evening demand peaks. Reene Energy will own and operate the facility, while Appletree will provide EPC services; construction is scheduled to start in October 2026, with operations targeted during FY2027.
Kyushu Electric Power has submitted a project-stage environmental consideration document for the planned new Shimousen-Matsubara pumped-storage hydroelectric power station. The submission marks an early planning and environmental-assessment stage; investment cost, capacity and construction schedule were not disclosed in the source.
Kokusai Kogyo, which owns and operates the facilities under an on-site PPA contract with Muko City, completed solar power generation systems designed and installed by SYLA Solar at Muko Municipal Dairoku Koyo Elementary School and Muko Municipal Nishinooka Junior High School in Kyoto. Construction ran from January 19 to February 28, 2026; the project provides renewable electricity and emergency power during outages.