RWE is making significant strides in energy storage with the construction of three new battery parks at its Westfalen power plant site in Hamm, Germany.
The new facilities will add a total installed capacity of approximately 600 megawatts (MW) and a storage capacity of 1.2 gigawatt hours (GWh), reinforcing RWE’s commitment to supporting grid stability and the energy transition. The company is investing a mid three-digit million-euro sum in the project.
The combined battery storage at the site, including a system that commenced operations in February, will reach a total capacity of 1.35 GWh — enough to charge over 23,000 average electric vehicles. These storage solutions are designed to counteract electricity price fluctuations and improve the efficiency of renewable energy utilization.
“Battery storage systems are an ideal solution for stabilizing the electricity grid. Our expansion at the Westfalen site will position Hamm as Germany’s flagship battery storage location, helping balance supply and demand while contributing to price stability in the energy market,” Nikolaus Valerius, CEO of RWE Generation SE, said.
“The battery storage at Westfalen will ensure grid stability and mitigate short-term fluctuations efficiently. Combined with other major energy projects, Hamm is becoming a key hub for renewable energy infrastructure,” Marc Herter, Mayor of Hamm, said.
The battery systems at Westfalen are designed to provide critical grid services using control technology and high-speed inverters. These innovations enable the systems to supply instantaneous reserve power within milliseconds.
The new battery fields will span over six hectares and incorporate more than 25,000 lithium-iron-phosphate (LFP) battery modules housed in 316 containers. Preparatory construction work is already underway, with the new systems scheduled to come online between 2026 and 2028.
RWE operates storage facilities with a total capacity of around 1,200 MW across the U.S., Europe, and Australia.