LEAG and Fluence Energy (NASDAQ: FLNC) have announced plans to build Europe's largest battery energy storage system (BESS) at the site of the former Boxberg coal power plant in eastern Germany. The project will have a total capacity of 4 GWh and marks a major step toward transforming the region's energy infrastructure from coal to renewables.

Key takeaways

• Massive scale: The project will deploy 2 GW / 4 GWh of battery capacity, enough to stabilize the grid and store excess renewable power for later use.

• Phased development: Construction is expected to begin in 2026, with phased commissioning leading up to full operation by 2028.

• Strategic purpose: The system will support Germany's energy transition by integrating wind and solar generation, replacing fossil baseload power with flexible storage.

• Partners' roles: Fluence will provide its Gridstack Pro technology and digital optimization software, while LEAG leads site development and grid connection.

• Energy park transformation: The battery installation is part of LEAG's larger "Green Power Plant" initiative -- a plan to convert its lignite-based power assets into renewable and storage hubs across the Lusatia region.

Street view

Analysts view this as a flagship moment for European grid transformation and a commercial validation for Fluence's large-scale BESS solutions. The project underlines both firms' leadership in grid modernization and positions Germany as a global benchmark for utility-scale energy storage.

Catalysts / what's next

• Final investment decision (FID): Expected in 2026 following permitting and grid studies.

• European energy policy tailwinds: EU funding and Germany's push for storage infrastructure could accelerate rollout.

• Technology milestones: Fluence's AI-driven platform will be tested at an unprecedented scale, potentially setting new efficiency and stability benchmarks.

• Future expansion: LEAG plans to add up to 7 GWh of additional capacity across its brownfield sites by 2030.

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COMTEX_470091336/2927/2025-11-07T10:31:07