A 602 MWh grid-scale battery storage facility has been connected to Bulgaria’s electricity grid in the coastal city of Burgas. The companies involved described it as one of the most significant energy storage additions in the country in recent years. The installation adds to the country’s overall flexibility resources.
The project was developed by Bulgarian renewable energy company Solarpro Technology in cooperation with Chinese battery manufacturer CATL. The companies said the arrangement combined local engineering expertise with CATL’s battery technology solutions. Solarpro Technology was responsible for delivery of the system through its role in the project.
Battery technology and system integration
Solarpro Technology acted as engineering, procurement and construction (EPC) contractor. Its scope covered design, installation and full integration of the battery system into Bulgaria’s grid infrastructure. The facility is based on CATL’s TENER battery storage technology.
The companies stated that TENER is designed for large-scale grid applications and high operational flexibility. They said the installation increases Bulgaria’s total energy storage capacity by around 10%. The project therefore expands grid-scale storage capacity within the national power system.
Balancing services for power supply and demand
The battery system is expected to primarily provide balancing services. It will support the transmission system operator in managing fluctuations between electricity supply and demand. This is particularly relevant during periods of high renewable generation.
According to the companies, the facility will absorb excess electricity and release it during peak demand. They said this approach is intended to improve grid stability and reduce volatility in the Bulgarian power market. The project is positioned as a large-scale installation within Eastern Europe.
Plans for further storage projects
The companies described the project as one of the largest battery storage installations in Eastern Europe. They said it represents a step forward in the region’s transition toward flexible, renewable-based power systems. Following completion, Solarpro Technology and CATL confirmed plans to continue cooperation.
The firms said they intend to pursue additional battery storage projects in Bulgaria and across wider Southeast European markets. The confirmation points to further expansion of grid-scale storage capacity in the region. No further project details were provided in the information released.