Today’s renewable energy news includes announcements from Green Flexibility, Akaysha, RWE, among others.
Green Flexibility Acquires 750-MW Battery Storage Portfolio in Germany
German energy storage developer Green Flexibility has acquired a portfolio of battery energy storage system (BESS) projects totaling 750 MW/3 GWh from local developer Kajoni, significantly expanding its presence in Germany’s rapidly growing energy storage market. The transaction strengthens Green Flexibility’s position as a long-term developer, investor, and operator of utility-scale battery storage assets. Under the agreement, Kajoni will c ontinue developing the projects until they reach ready-to-build (RTB) status. The battery projects are currently participating in Germany’s maturity assessment process for high-voltage grid connections, a competitive framework used to allocate scarce grid capacity. Green Flexibility will provide the financial backing required for participation, including grid connection-related costs and security requirements. Once grid connection approvals are secured and the projects reach RTB stage, Green Flexibility will assume responsibility for construction, operation, and commercial optimization. The 3-GWh portfolio will play an important role in supporting Germany’s renewable energy expansion by storing excess wind and solar power and releasing it during periods of high demand. The acquisition highlights the growing importance of large-scale battery storage in improving grid stability, energy security, renewable energy integration, and power system flexibility, all of which are critical to Germany’s transition toward a low-carbon and renewable-powered energy system.
Akaysha and Partners Break Ground on 20-MW Battery Storage Project in Japan
Akaysha Energy Japan, Tokyu Land Corporation, and IBeet Inc. have commenced construction of a 20-MW/82-MWh Battery Energy Storage System (BESS) in Fukuoka Prefecture, Japan, marking another step forward in the country’s efforts to strengthen grid flexibility and renewable energy integration. The project is being developed by Iizuka Seta Energy Storage LLC, a joint venture formed by the three partners. The battery facility will be located in the Seta district of Iizuka City and is designed to support the electricity network on Kyushu Island by providing balancing services and helping manage fluctuations in renewable energy generation. The project has received support through subsidies from Japan’s Ministry of Economy, Trade and Industry (METI) under its programme to expand renewable energy and grid-scale storage capacity. A key advantage of the project is its ability to store excess renewable electricity and dispatch it when needed, improving grid stability, energy security, and renewable energy utilization. Akaysha will provide technical expertise and commissioning support, leveraging its experience in developing and operating large-scale battery projects globally. The development also reflects growing investment in Japan’s energy storage sector as the country accelerates the deployment of batteries to support its clean energy transition. The project forms part of a broader pipeline of grid-scale storage investments aimed at enabling a more flexible, resilient, and low-carbon power system
RWE Receives Approval for 320-MW Solar Park with Battery Storage in England
German energy company RWE has received development consent from the UK government to construct the 320-MW Peartree Hill Solar Farm in East Riding of Yorkshire, England, alongside a Battery Energy Storage System (BESS). The approval marks a significant milestone for one of the UK’s largest proposed solar and storage projects and supports the country’s clean energy ambitions. The Peartree Hill project will install large-scale solar photovoltaic panels capable of generating enough renewable electricity to power approximately 167,000 homes. A key feature of the development is the integration of battery storage, which will enable excess solar energy to be stored and dispatched when demand is highest, improving grid flexibility, reliability, and renewable energy utilization. The solar farm has been designed with a dual-use land strategy, allowing around 95 percent of the site to remain available for sheep grazing, supporting both renewable energy generation and agricultural activities. Electricity generated by the project will be transmitted to the national grid through an existing substation via underground cable connections. The project is expected to contribute significantly to the UK’s energy security, carbon reduction targets, and transition away from fossil fuels. By combining large-scale solar generation with battery storage, Peartree Hill will help deliver a more resilient, sustainable, and low-carbon electricity system for the future. FAHEEMA P
