RWE is set to construct a 400 MW battery storage system in Lingen, Lower Saxony, Germany.
The new facility, located on the former Dralon site north-east of the Emsland gas-fired power plant, will be the largest battery storage facility in the region.
It is designed to provide maximum output for at least two hours, equating to a storage capacity of at least 800 megawatt-hours.
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The investment decision has been finalised, with RWE targeting an operational start for the facility in 2028.
The Lingen battery storage system will deliver balancing energy to help stabilise the electricity grid. It will be equipped with technology to provide additional grid services such as instantaneous reserve (inertia), supporting grid resilience and flexibility.
The installation will include more than 200 lithium-ion battery units alongside over 100 inverters, more than 50 medium-voltage transformers, two high-voltage transformers and two switch panels.
The system will connect to the regional electricity grid via Amprion’s Hilgenberg substation less than 50m from the site.
Preparation works will begin on an 8.5-hectare area in the southern part of the industrial estate, with all permits secured. Construction on the facility will commence on 2 February.
RWE Generation CEO Nikolaus Valerius: “With the expansion of renewable energies, the demand for firm capacity is growing.
“New gas-fired power plants and battery storage facilities complement each other perfectly in this regard: while gas-fired power plants step in when wind and solar power fail to supply energy for hours or days, battery facilities primarily bridge short-term gaps or periods of peak load.
“Our new battery storage facility in Lingen will absorb or feed in power within a few milliseconds, depending on demand. It will thus make an important contribution to grid stability and reliable electricity prices.”
RWE currently operates approximately 1.2 GW of battery storage capacity globally as of the end of the third quarter of 2025, with more than 2.7 GW under construction across the US, Europe and Australia. The company plans further global expansion as part of its growth strategy for the energy transition.
In December 2025, RWE signed an agreement with PGE to sell its F.E.W. Baltic II offshore wind project in Poland, which had a planned capacity of 350 MW.
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