Large-scale storage to relieve grid load in windy region

15.09.2025

Source: E & M powernews

A large-scale battery storage facility with a capacity of 20 MW is being built in Reußenköge. Project developer Dirkshof and the EWE subsidiary "be.storaged" want to put the facility into operation by the end of 2025.

A large-scale battery storage facility is currently being built in Reußenköge (Schleswig-Holstein). The project is being implemented by the project developer Dirkshof and the EWE subsidiary "be.storaged", announced the Oldenburg-based energy supplier EWE. The storage facility has an output of 20 MW and a capacity of 40 MWh. The components will be delivered in mid-September and commissioning is scheduled for the end of 2025.

The battery storage facility will complement the existing wind turbines in the region and demonstrate how renewable energies can contribute to security of supply in combination with storage solutions. The large storage facility is being built on an area of around 500 square meters. In purely mathematical terms, it could supply around 4,000 households with electricity for a day. The site is in the immediate vicinity of existing wind turbines, which will feed the storage facility directly.

The EWE storage subsidiary is responsible for the planning, construction, operation and maintenance of the facility. The construction in Reußenköge is part of EWE's larger storage strategy. The Group has announced that it will invest around 16 billion euros in the conversion of its energy supply by 2035. In addition to storage facilities, this also includes renewable generation, grid expansion, hydrogen projects, heating networks and electromobility.

Be Storaged specializes in the planning, implementation and operation of large-scale battery storage systems; the company plans to put large-scale battery storage systems with a total storage capacity of more than 300 MWh into operation this year. For Reußenköge, the company is relying on components from the system provider Sungrow.

Battery storage systems are considered an instrument for cushioning the volatility of renewable generation. They can absorb generation peaks and feed them back into the grid as required. In a region with high wind power, the system is intended to help stabilize the grid frequency. Project partner Dirkshof sees the storage system as a supplement to existing wind power projects.

Author: Heidi Roider