Today’s renewable energy news includes updates from RWE, Tamagawa Energy, Sumitomo, among others.
RWE Launches Full Operations at Australia’s First Eight-Hour Battery Storage System
RWE has received final approval to begin full operations at the 50MW/400MWh Limondale Battery Energy Storage System in New South Wales, marking Australia’s first operational eight-hour battery storage project. The innovative facility uses 144 Tesla Megapacks with the unique capability to charge at 100MW and discharge continuously for more than eight hours, significantly improving long-duration energy storage performance. The project supports grid stability, renewable energy integration, and evening peak electricity demand management as coal-fired generation declines. Customer-focused benefits include enhanced energy reliability, lower carbon emissions, improved renewable power utilization, and stronger long-term energy security for Australian households and businesses. Co-located with the 249MWac Limondale Solar Farm, the system also minimizes additional infrastructure needs and environmental impact. RWE said the project represents a major milestone in Australia’s clean energy transition and future-ready battery storage innovation.
Tamagawa Energy Acquires 2MW Battery Storage Project in Fukuoka
Tamagawa Energy, a subsidiary of Tamagawa Holdings, has acquired a 2MW/8MWh grid-scale battery energy storage project in Fukuoka Prefecture, Japan, accelerating its entry into the fast-growing energy storage sector. The innovative battery project is scheduled for grid connection in July 2026 and will participate in Japan’s balancing market to support renewable energy integration and grid stability. Valued at approximately JPY 684 million, the facility highlights growing investment in flexible energy infrastructure designed to improve electricity reliability and optimize renewable power usage. Customer-focused benefits include enhanced grid resilience, faster response to electricity demand fluctuations, improved renewable energy efficiency, and stronger long-term energy security. Tamagawa Holdings said the acquisition enables the company to begin monetising battery storage operations earlier than planned while supporting Japan’s broader decarbonisation and clean energy transition goals through advanced grid-scale storage technology.
Sumitomo Invests in 694MW UK Battery Storage Portfolio with Gresham House
Japan’s Sumitomo Corporation will invest in a 694MW battery energy storage portfolio in the UK being developed by Gresham House Energy Storage Fund, strengthening Britain’s renewable energy infrastructure and grid flexibility. The innovative portfolio includes five utility-scale battery energy storage system (BESS) projects across England and Scotland, designed to support renewable integration, stabilize electricity supply, and improve long-term grid resilience. Initial investment will focus on three projects totaling 397MW, including the Cockenzie, Monet’s Garden, and Elland 2 battery facilities. Customer-focused benefits include improved energy reliability, enhanced renewable power utilization, reduced grid congestion, and stronger energy security as the UK accelerates decarbonisation efforts. Sumitomo also entered a strategic partnership with Gresham House to expand large-scale battery storage opportunities globally, combining advanced BESS expertise, operational innovation, and sustainable infrastructure investment to support the transition toward cleaner and more flexible energy systems.
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