NGEN Group inaugurated its battery storage system in Austria’s Carinthia province after expanding it. At 21.9 MW in operating power and 43.8 MWh in capacity, it is again the country’s largest grid-supporting BESS.
With the official commissioning of the Arnoldstein-Gailitz battery energy storage system (BESS) in the Carinthia province, the NGEN Group has set another milestone in Austria’s energy transition. Following the completion of its second expansion phase in 2025, the facility now boasts 21.9 MW and 43.8 MWh in capacity, making it the country’s largest and most powerful grid-supporting battery storage power plant.
The project marks a significant step toward a sustainable, secure, and climate-neutral energy future and stands as a strong symbol of innovation, energy security, and technological excellence Made in Carinthia, the company stressed. NGEN is headquartered in Žirovnica in Slovenia, just across the border from Arnoldstein.
NGEN’s software contributes to grid stability, renewables deployment
NGEN Group developed the energy storage project and completed the standalone facility in 2023 as Austria’s first large-scale investment of its kind.
The company stressed that the BESS makes a crucial contribution to grid stability and the integration of renewable energy sources through its innovative software solutions. They enable peak shaving – to reduce load peaks and ease grid congestion – and the provision of balancing reserves for grid stability.
The company’s proprietary software enables trading optimization, peak shaving and balancing services
NGEN’s proprietary software also optimizes intraday and day-ahead trading on the power exchange. The Arnoldstein-Gailitz BESS enhances the security of supply by providing flexibility and helps accelerate the integration of renewables.
The company pointed out that the facility has a minimal impact on the landscape. NGEN Group offers rapid project implementation in urban environments and power supply support for charging stations, including lower electricity costs, around-the-clock availability of renewable energy and blackout resilience.
Redispatch capabilities prevent local supply bottlenecks through load flow balancing, the update adds.
Carinthia pioneering resilient, sustainable energy infrastructure
NGEN is already planning a four times larger BESS facility in Upper Austria.
“With the Arnoldstein-Gailitz battery storage power plant, we are sending a clear signal: Carinthia is becoming a pioneer of a modern, resilient, and sustainable energy infrastructure. This facility demonstrates what is possible when technology, political will, and local commitment come together. It bridges the gap between generation and consumption, makes solar energy reliably available, and ensures true energy security,” managing directors of NGEN Austria Matija Dolinar and Andreas Ljuba explained in a joint statement.
The expanded BESS underscores Carinthia’s role as a hub of innovation and demonstrates that grid-stabilizing storage technologies are decisive for the energy transition, not only in Austria but across Europe, the company said.
“Our vision is a fully digitalized and decentralized European electricity system that keeps pace with the rapid growth of renewable energy and sustainably reduces CO2 emissions,” said Chief Executive Officer and Founder of NGEN Group Roman Bernard.
Since 2019, the company has been combining its expertise in engineering, procurement and construction (EPC) services with cutting-edge storage technology and advanced energy market connectivity. NGEN Group currently employs over 200 people across nine countries, including 40 in Austria. It has an annual turnover of EUR 100 million, of which EUR 60 million in Austria.