Major BESS Milestones in Germany: LEAG Starts Boxberg Construction, Alpiq Acquires Bollingstedt
The German battery energy storage market continues to accelerate, marked by massive greenfield construction on former fossil fuel sites and strategic acquisitions of operational assets. Recent developments from LEAG Clean Power and Alpiq highlight the robust growth of the BESS sector in Europe's largest power market.
LEAG Transforms Coal Site with GigaBattery Boxberg
LEAG Clean Power has officially started construction on the GigaBattery Boxberg 400, a massive 400 MW / 1.6 GWh battery energy storage system located at the former Boxberg coal-fired power plant site in Saxony. This project is a cornerstone of LEAG's GigawattFactory strategy, which aims to transform legacy lignite-based sites into modern renewable energy hubs. HyperStrong International (Germany) will supply the lithium iron phosphate (LFP) battery systems using its HyperBlock III platform, while Siemens Energy will provide a new 380 kV gas-insulated switchgear to ensure seamless and high-capacity grid integration.
Alpiq Expands Portfolio with Bollingstedt Acquisition
In the operational asset space, Swiss energy company Alpiq has acquired the Bollingstedt BESS project from ECO STOR. Located in Schleswig-Holstein, the facility boasts a total capacity of 103.5 MW and a storage capacity of 238 MWh. Having been operational since June 2025, it stands as one of Germany's largest and most established BESS projects. The transaction was advised by Watson Farley & Williams (WFW). This acquisition significantly boosts Alpiq's flexible generation portfolio in Germany, allowing the company to capitalize on the country's highly volatile electricity markets and the growing need for frequency containment reserves and peak shifting.
Source: Voice of Renewables / WFW
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