Renewable energy company Enery has completed commissioning of a large-scale battery energy storage system in southeastern Bulgaria, adding one of the biggest operational storage facilities in Central and Eastern Europe.
The standalone installation, located near Nova Zagora, has a total storage capacity of 601.8 MWh and an installed power output of 150 MW. It is designed to enhance power system stability by absorbing excess electricity during periods of low demand and releasing it back into the grid during peak consumption hours.
The facility is expected to play a key role in supporting the continued expansion of renewable energy sources in Bulgaria, while also contributing to reduced reliance on electricity generated from fossil fuels.
The system is directly connected to the national transmission network via a newly constructed 33/110-kV substation. It consists of 120 battery units, each with an approximate capacity of 5 MW, forming a modular storage structure that enables flexible operation and efficient energy dispatch.
Operations of the facility will be managed through a virtual power purchase agreement (VPPA) with global energy and commodities trading company Vitol, ensuring structured market integration and commercial optimization of stored energy.
Financing for the project was secured through a green lending package arranged by DSK Bank, a member of the Hungarian OTP Group, reflecting continued financial sector support for large-scale energy transition infrastructure.
The commissioning of the Nova Zagora project marks another significant step in the development of battery storage capacity in the region, as Southeastern European countries increasingly invest in modernizing electricity systems and integrating higher shares of renewable energy into their national grids.
