Hungary has expanded its energy storage infrastructure with the launch of a major battery facility in the city of Győr. The installation, developed by the Alteo Group, provides nearly 100 MWh of storage capacity, making it the largest industrial-scale electricity storage project currently operating in the country.
Located in the Győr Industrial Park, the installation delivers a rated output of 49.9 MW and a storage capacity of 99.8 MWh. Once connected to the national system, the facility immediately became a key component of Hungary’s energy infrastructure, accounting for roughly 20% of the nation’s total installed storage capacity.
The project forms part of Hungary’s Recovery and Resilience Plan, which supports investments aimed at strengthening the energy system and accelerating the transition to cleaner technologies. Alteo carried out the investment through three subsidiaries, allocating around 48 million euros to deploy advanced lithium-ion storage technology. Approximately 34 million euros of that amount was directed specifically toward the Győr installation. Public funding also supported the development, with government subsidies totaling about 16 million euros, including roughly 12 million dedicated to the Győr project.
The new facility significantly expands Alteo’s role in Hungary’s energy storage sector. The company had already pioneered industrial battery installations in the region several years ago, and with the latest additions its overall storage capacity has now reached 90 MW.
Large-scale battery systems such as the one in Győr are becoming increasingly important as renewable energy generation grows. By absorbing surplus electricity during periods of high production and releasing it when demand rises, storage facilities help stabilize the electricity network and improve the reliability of energy supply, particularly when integrating variable sources like solar and wind power.
