LEAG Clean Power GmbH and Fluence Energy GmbH announced plans to construct Europe's largest battery energy storage system, a 1 GW / 4 GWh facility in Jänschwalde, Germany. The project, called GigaBattery Jänschwalde 1000, represents Fluence's largest single storage project globally to date and will be powered by the company's Smartstack energy storage platform.

The announcement was made on November 7, 2025, during a signing ceremony attended by key executives from both companies, including Thomas Merker, CFO of LEAG; Markus Meyer, Managing Director of Fluence Energy GmbH; Julian Nebreda, Fluence President and CEO; Adi Roesch, CEO of LEAG; Thomas Brandenburg, Managing Director of LEAG Clean Power; and Carsten Krüger from Fluence.

Project Specifications and Technology

The GigaBattery Jänschwalde 1000 system will utilize Fluence's advanced Smartstack energy storage solution. The technical design incorporates a four-hour storage facility configuration intended to stabilize the grid and enable optimal use of existing grid connections. The system will be designed to deliver essential grid services, support energy trading, reinforce Germany's energy security, and drive the energy transition forward at scale.

LEAG Clean Power operates as an innovative power producer that combines photovoltaic and wind energy systems with flexible power plants and large-scale storage facilities. This combination of different power technologies is termed as GigawattFactory, which is expanding at energy sites in the Lusatian energy region and at other locations throughout Germany.

Executive Statements and Strategic Vision

Adi Roesch, CEO of the LEAG Group, described the project as igniting another growth engine for their GigawattFactory. He emphasized that by constructing gigascale storage facilities, the company is addressing one of the biggest challenges of the energy transition: ensuring continuous energy availability regardless of renewable energy output. Roesch stated that the key to the future energy system lies in combining renewable energies, storage facilities that can be used as needed, and flexible power plants.

Julian Nebreda, President and CEO of Fluence, expressed pride in partnering on a project of this scale and importance, congratulating LEAG Clean Power on this milestone for the energy future of Germany and Europe. He characterized the flagship project as demonstrating that when expertise, vision, and courage come together, major transformation is possible.

Thomas Brandenburg, Managing Director of LEAG Clean Power GmbH, highlighted the project's exceptional size and noted that the technical design as a four-hour storage facility helps stabilize the grid while enabling optimal utilization of existing grid connections. He expressed anticipation for implementing the project with Fluence as an experienced technology partner.

Market Position and Industry Context

The German government reaffirmed the crucial role of energy storage in ensuring a secure, affordable, and sustainable power system during 2025. LEAG and Fluence are applying cutting-edge technologies to strengthen system stability and better integrate renewable energy sources into the power grid.

Markus Meyer, Managing Director of Fluence Energy GmbH, emphasized the company's deep roots in Germany and expressed honor that their technology will play a key role in transforming both the country and the region. He highlighted Fluence's proven expertise in delivering advanced battery storage systems and their strong German software, execution, and services team as positioning factors for supporting LEAG in realizing the GigaBattery Jänschwalde 1000 project.

Company Backgrounds

Fluence Energy, Inc. trades on NASDAQ under the symbol FLNC and operates as a global market leader delivering intelligent energy storage and optimization software for renewables and storage. The company's solutions and operational services help create more resilient grids and unlock the full potential of renewable portfolios. Fluence has gigawatts of projects successfully contracted, deployed, and under management across nearly 50 markets worldwide.

LEAG Clean Power GmbH operates as part of the LEAG Group, which ranks as Germany's second-largest electricity producer and one of the largest private employers in Eastern Germany. LEAG Clean Power focuses its business activities on projects in battery storage and innovative power plants, making decisive contributions to the development of the LEAG GigawattFactory.

The LEAG Group is investing in renewable energy expansion, storage capacities, hydrogen-compatible power plant construction, and energy generation from biomass as part of its transformation from a conventional energy supplier to a future-oriented energy transition company.

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