EP Group is accelerating the transformation of Europe’s energy landscape with the launch of the GigaBattery Boxberg 400 project in Saxony, Germany. Through its subsidiary LEAG Clean Power GmbH, the Group is investing in large-scale battery storage to deliver greater flexibility, stability, and sustainability to the power grid.
The new facility will provide 400 MW of grid capacity and 1,600 MWh of storage—enough to supply approximately 640,000 households for four hours. As another large-scale storage project within EP Group, GigaBattery Boxberg 400 is a cornerstone of the future GigawattFactory, which will integrate renewable energy, advanced storage, and hydrogen-ready generation.
This investment expands on EP Group’s recently announced large-scale GigaBattery Jänschwalde project, the BigBattery Lausitz (operational since 2020), and BigBattery Oberlausitz, which is currently in an advanced stage of construction. Together, these projects demonstrate EP Group’s strategic commitment to positioning LEAG at the forefront of Europe’s energy transition—building a more resilient, flexible, and sustainable energy system for the future.
Supporting Grid Stability and Renewable Integration
Battery energy storage is essential for a modern, resilient energy system. By storing surplus renewable electricity and releasing it during periods of high demand or low generation, GigaBattery Boxberg 400 will help stabilize the grid and ensure that clean energy is available when it is needed most—even when the sun is not shining or the wind is not blowing. This capability maximizes the use of renewable resources, reduces reliance on fossil fuels, and supports the transition to a low-carbon energy future by shifting renewable power to the hours when demand is highest.
“Large-scale storage is a cornerstone of our long-term strategy to enhance energy system flexibility. It enables the integration of renewable resources, strengthens grid stability, and accelerates the development of a modern, sustainable energy infrastructure. With this project, we are taking another significant step toward a resilient and decarbonized European power system,” said Tomáš David, Senior Executive of EP Group responsible for renewables, energy storage systems, and new business opportunities.
Technology and Partnerships
The GigaBattery Boxberg 400 will feature proven four-hour storage technology based on the HyperBlock III platform. HyperStrong International (Germany) GmbH, one of the global leading producers of utility-scale battery solutions, will supply the core storage system, while Siemens Energy will deliver the 380 kV GIS grid connection. The system is designed for industrial-scale applications and incorporates liquid cooling, intelligent energy management, and advanced safety standards.
About EP Group
EP Group is one of Europe’s leading privately owned industrial groups, operating across the EU and the UK. With a diversified portfolio spanning energy, logistics, food wholesale and retail, media, and e-commerce, the Group is committed to delivering essential services with reliability, efficiency, and social responsibility.
About LEAG
LEAG is Germany’s second-largest electricity producer and a key driver of the country’s energy transition, investing in renewable energy, storage, and hydrogen-ready power plants as part of its transformation strategy.