Vattenfall Repurposes Nuclear Site for 1 GWh BESS

Swedish energy company Vattenfall has made a final investment decision and awarded a major contract to Fluence Energy for the development of a large-scale battery energy storage system (BESS) in Germany. The 254 MW/1,000 MWh facility will be constructed at the site of the decommissioned Brunsbüttel nuclear power plant. This strategic repurposing of existing energy infrastructure highlights a growing trend in the EU of utilizing former fossil fuel and nuclear sites for new renewable and storage assets.

The four-hour duration facility will leverage Fluence’s advanced Gridstack Pro 5000 platform, integrated with a sophisticated energy management system. Fluence is providing turnkey engineering, procurement, and construction (EPC) services, alongside long-term maintenance agreements. The system will connect directly to the 380 kV transmission network operated by 50Hertz, ensuring high-capacity power injection and grid support.

Expanding Partnership and Market Impact

This agreement significantly expands the ongoing partnership between Vattenfall and Fluence, bringing their collaboration to eight battery storage projects across the region. Construction on the Brunsbüttel site is scheduled to begin in 2027, with commissioning targeted for the end of 2028. As Vattenfall's largest storage project to date, it will play a vital role in integrating renewable energy in northern Germany.

"By repurposing the Brunsbüttel nuclear site, Vattenfall is transforming legacy infrastructure into a modern hub for flexible, zero-carbon energy storage, supporting Germany's ambitious Energiewende goals."

The project will actively participate in wholesale electricity markets, providing essential flexibility to balance the high penetration of wind power in the region. This development reinforces Germany's position as a premier market for utility-scale BESS deployment in Europe.

Source: Energy Monitor / Power Systems Technology

This article was assisted by AI analysis. Please refer to the original source for official information.