Vattenfall continues preparations for huge battery storage facility in Germany

Zuzana Vrbová
Zuzana Vrbová
17 October 2026, 13:09
Vattenfall continues preparations for huge battery storage facility in Germany

Vattenfall has awarded Fluence a contract to build a battery storage facility with a capacity of 1 GWh in Brunsbüttel, Germany. The project expands Vattenfall’s energy storage portfolio with a major development in Europe’s largest economy.

Vattenfall has chosen to work with energy storage specialist Fluence, which will supply a system with a capacity of 254 MW, the RenewablesNow website reported. The project underscores the growing importance of large-scale batteries for integrating renewable electricity and improving flexibility in European energy systems.

On 14 October, the two companies announced that Fluence had won a contract to supply an energy storage system in Brunsbüttel, Schleswig-Holstein. The facility will be built on the site of the former Brunsbüttel nuclear power plant, which is currently being decommissioned, transforming an established energy hub and giving it a new role in the electricity system.

One of Germany’s largest battery storage facilities

With a capacity of 254 MW and storage capacity exceeding 1,000 MWh, the installation is likely to become one of Germany’s largest battery storage projects and the largest project to date for Vattenfall.

Fluence will use its Gridstack Pro 5000 platform, which combines battery systems with energy management software. The company will oversee planning, procurement, construction and commissioning, and will also provide long-term service. Construction is scheduled to begin in 2027, with commissioning and connection to the transmission grid operated by 50Hertz planned for the end of 2028.

According to Vattenfall, the project will almost double its existing battery storage capacity. The company’s investment is part of a broader strategy to expand flexible solutions as wind and solar power generation grows. Battery storage can help balance fluctuations in renewable electricity generation, support grid stability and reduce the need to rely on fossil fuel generation during periods of low renewable output.

Vattenfall’s September investment decision had already established the Brunsbüttel project as a central element of its energy storage strategy. The subsequent contract with Fluence moves the project closer to implementation and shows how existing energy facilities and large-scale storage technology can support Germany’s evolving electricity infrastructure.

Translation disclaimer

This article is a machine translation of the Czech original and has not yet been fully reviewed. In case of any doubt, please refer to the Czech version.