German energy company LEAG Clean Power GmbH and HyperStrong International (Germany) GmbH, a subsidiary of Beijing HyperStrong Technology Co., Ltd. (688411.SH), have signed an engineering, procurement and construction (EPC) contract to deploy a 1.6 GWh utility-scale battery energy storage system (BESS) project in Germany. This major project represents one of the most significant developments in European energy storage infrastructure to date, positioning Germany at the forefront of the global energy transition.
The GigaBattery Boxberg 400 project, set to be built at the former site of LEAG’s Boxberg gas plant on a six-hectare area, with construction beginning immediately and completion targeted for 2026, demonstrates the strategic transformation of Germany’s traditional energy infrastructure. The facility will be constructed in Saxony, eastern Germany, where LEAG’s coal-fired power generation facilities once dominated the regional energy landscape.
Technical Excellence and Innovation
The project will deploy HyperStrong’s advanced HyperBlock III technology, featuring up to 5MWh battery capacity with a 34.5% increase in energy density. The system utilizes intelligent liquid cooling technology to ensure optimal performance of the battery and PCS throughout the life cycle, with the long-life, high-capacity 314Ah cells providing a capacity of 104.5kWh per pack.
The smart liquid cooling system maintains the optimal performance of cells and PCS throughout their lifecycle, while thermal control strategies adapt to various conditions, enhancing energy efficiency and cutting costs. This advanced thermal management system is particularly crucial for Germany’s variable climate conditions, ensuring stable operation year-round.
HyperStrong’s comprehensive EPC solution encompasses the entire project lifecycle. The Chinese integrator will provide engineering design, equipment supply, system integration, commissioning, grid connection, and long-term operation support. The company’s proprietary AI-optimized power trading platform will further enhance the project’s operational efficiency and market participation capabilities.
Strategic Significance for LEAG’s GigawattFactory
The Boxberg project forms a cornerstone of LEAG’s ambitious GigawattFactory concept, which represents one of Europe’s most comprehensive energy transition initiatives. LEAG announced plans to bring 7 GW of solar and wind capacity online by 2030, with ambitions potentially expanding to 14 GW by 2040.
By 2023, these ambitions expanded to include up to 14 GW of renewable energy generation, complemented by 2–3 GWh of battery storage and 2 GW of green hydrogen production. This integrated approach aims to create a net-zero baseload energy system that can reliably replace traditional fossil fuel generation.
“With this project, we continue to accelerate our GigawattFactory strategy and expand the foundation for a carbon-neutral energy system,” stated Adi Roesch, CEO of LEAG Group. “Battery energy storage plays a crucial role in balancing renewable fluctuations and ensuring energy remains available when it is needed. Working with a technology-driven partner like HyperStrong enables us to deliver on this vision efficiently and at scale.”
Recent Project Momentum
The HyperStrong partnership follows closely on LEAG’s recent announcement with Fluence Energy for an even larger project. LEAG enlisted US-headquartered system integrator Fluence last week for the larger, 1GW/4GWh GigaBattery Jänschwalde 1000 BESS, set for completion in 2027-28. Together, these projects position LEAG as a leader in European energy storage deployment.
LEAG’s two recently-announced BESS projects are by far the largest in the country to be entering construction, significantly exceeding previous German records. The rapid acceleration of these mega-scale projects reflects Germany’s urgent need for grid flexibility as renewable penetration increases.
HyperStrong’s Global Expertise
HyperStrong, with the EMEA regional headquarter in Frankfurt, Germany, is a Tier-1 global energy storage solution provider with extensive project experience across utility-scale and commercial & industrial applications. The company’s track record speaks to its capability to deliver complex, large-scale projects.
Founded in 2011, with more than 14 years of research and development, as well as experience garnered through more than 400 energy storage projects and 45 GWh of deployment, HyperStrong offers a portfolio of ESS products and one-stop solutions. The company has established five smart manufacturing bases, three R&D centers, two testing labs, and a global marketing center.
Most recently, HyperStrong demonstrated its rapid deployment capabilities in China. The company commissioned a 250MW/1000MWh standalone energy storage station in Jiuquan, Gansu province, equipped with 200 units of HyperBlock III 5MWh liquid-cooled energy storage system. Leveraging its end-to-end project management system, the company delivered and installed all 200 energy storage units and auxiliary equipment in just two months.
Strategic Supply Chain Partnership
Last week, HyperStrong announced that it had signed a 10-year Strategic Cooperation Agreement with CATL, the world’s largest lithium-ion battery OEM, that secures at least 200 GWh of energy storage batteries between 2026 and 2028. This partnership ensures HyperStrong’s ability to deliver on large-scale commitments like the LEAG project with secure battery supply.
Dr. Jianhui Zhang, Chairman and CEO of HyperStrong, emphasized the project’s significance: “This collaboration represents not only an important achievement for our global strategy but also a significant contribution to Germany’s and Europe’s renewable energy transition. Together, we are unlocking the potential of energy storage to power the next era of clean energy.”
Industry Leadership Comments
Pingyang Wang, Senior Vice President of HyperStrong International and President of EMEA Region, added: “We are truly honored that LEAG Clean Power has selected HyperStrong as their partner for the Boxberg project. This trust inspires us to bring our full expertise and commitment to deliver a project of the highest quality, while strengthening our long-term presence in Germany and supporting the energy transition across Europe.”
LEAG Clean Power GmbH is part of the LEAG Group, Germany’s second-largest electricity producer and one of the largest private employers in eastern Germany. The company’s transformation from conventional energy supplier to future-oriented energy transition company represents one of Europe’s most significant industrial transitions.
Market Context and Future Outlook
Germany has emerged as one of Europe’s most dynamic energy storage markets, driven by ambitious renewable energy targets and the need for grid stability. Germany is one of Europe’s busiest and most attractive grid-scale storage markets thanks to a deep wholesale energy market and, for now, favourable regulatory regime.
The Boxberg project will provide multiple value streams, including grid-balancing services, capacity market participation, and energy arbitrage through intraday trading. Once operational, the system will provide critical grid services, support renewable integration, and enhance energy security for the region.
LEAG anticipates an investment volume of over ten billion euros by 2030 for its complete GigawattFactory initiative. This massive capital deployment underscores the economic transformation underway in Germany’s traditional coal regions, creating new employment opportunities and establishing the foundation for a sustainable energy future.
The successful execution of this project will serve as a blueprint for similar transformations across Europe, where former fossil fuel infrastructure sites are being repurposed for renewable energy and storage facilities. As Europe accelerates its energy transition, projects like GigaBattery Boxberg 400 demonstrate the critical role that large-scale energy storage will play in achieving carbon neutrality while maintaining grid stability and energy security.
