Hungary has strengthened its electricity system with the commissioning of its largest battery energy storage facility, located near the town of Buj in the northeastern part of the country. The project represents an important step in the modernization of the power grid and in supporting the increasing share of renewable energy generation.
The installation consists of two battery storage units with a combined capacity of 99.8 MW. Its development was supported by more than €31 million in non-repayable European Union funding, making it one of the most significant energy storage investments in Hungary to date.
Government officials stated that the facility will improve the flexibility of the electricity system by helping to balance fluctuations between supply and demand. It is also expected to enhance market competition, reduce system balancing costs, and contribute to more stable electricity prices over the long term.
The Buj battery project was developed by Greenvolt Power, a subsidiary of the Greenvolt Group. Company representatives described it as their second investment in Hungary and indicated that another project in the country is already being prepared. Greenvolt operates exclusively in the renewable energy sector and is active across Europe, Asia, and North America as part of the investment portfolio of US-based KKR.
Each of the two installed battery systems has a rated power of 49.9 MW and an energy storage capacity of 144.3 MWh. The assets are operated through the project companies Buj Energy Storage and Buj Battery.
Overall, the project reinforces Hungary’s growing role in energy storage deployment in Central Europe, supporting grid stability and enabling higher penetration of renewable energy sources.
