July 22, 2021: RWE is building one of the largest battery storage systems in Germany — a 117MW facility that is being installed at the company’s power plants in Lingen in Lower Saxony and Werne North Rhine-Westphalia, the German utility announced on July 22. The two systems will cost around €50 million ($59 million).
“What is special about this project is that the batteries will be virtually coupled with RWE’s run-of-river power stations along the river Mosel. By raising or decreasing the flow-through at these power stations, RWE can make additional capacity available, also as balancing energy,” says a company official.
“This coupling process raises the total capacity of the batteries by another 15%. The battery and the hydropower stations work hand in hand to help keep the frequency in the power grid stable.”
The system is scheduled to start operations at the end of 2022.
The planned system comprises 420 lithium-ion battery racks, housed in 47 overseas shipping containers spread across the two power stations. The system at Gersteinwerk in Werne will have a capacity of 72MW while the one at the Emsland station in Lingen will have 45MW.
“Battery storage systems are essential to the success of the energy transition. They help balance out fluctuations in the power grid, which are increasing as the share of renewable energies grows. Our project is setting new standards and shows how we can offer the market even more flexibility by intelligently linking up battery capacity with run-of-river power stations,” said Roger Miesen, CEO of RWE Generation.
RWE is also working on projects with new technologies such as redox-flow storage systems and second-life batteries.