Hungary has commissioned its largest battery energy storage facility near the town of Buj in the northeastern part of the country. The project is described as a step in power grid modernization and in supporting a growing share of renewable electricity generation.
The installation comprises two battery storage units with a combined capacity of 99.8 MW. Development received more than €31 million in non-repayable European Union funding, according to project information.
Grid flexibility and market impacts cited by officials
Government officials said the facility is intended to improve electricity system flexibility. They linked this to balancing fluctuations between supply and demand.
The same statements also pointed to potential effects on market competition and system balancing costs. Officials further said the project could support more stable electricity prices over the long term.
Project developer and ownership structure
Greenvolt Power, a subsidiary of the Greenvolt Group, developed the Buj battery project. Company representatives described it as their second investment in Hungary and said 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. The company’s investment portfolio is associated with US-based KKR.
Technical configuration and operating entities
Each of the two installed battery systems has a rated power of 49.9 MW. The energy storage capacity for each system is 144.3 MWh.
The assets are operated through the project companies Buj Energy Storage and Buj Battery. The commissioning adds to Hungary’s expanding deployment of energy storage in Central Europe, supporting grid stability alongside higher renewable penetration.
