Rezolv Energy receives EU grant for battery energy storage project in Bulgaria

Rezolv Energy has secured a grant from the European Union under the NextGenerationEU programme for the deployment of a Battery Energy Storage System (BESS) at the St. George solar power plant in Bulgaria.

The project involves the construction of a 90MW / 240.768MWh BESS, which is designed to enhance the operational flexibility and energy management capabilities of the plant. The system employs a hybrid configuration of 0.5C and 0.25C battery technologies, offering a balance between high-power and high-energy capabilities.

The storage system will initially be used for load shifting, with future capability to support energy arbitrage and ancillary grid services. Once operational, the BESS will optimise energy dispatch from the plant to optimise the use of the clean power generated.

St. George is a 225 MW utility-scale solar project which is currently being built on the site of the former Silistra airport in northeastern Bulgaria. The plant will feature approximately 400,000 solar panels and will come onstream at the beginning of 2026.

The BESS project is scheduled for completion and commissioning by the end of March 2026. 50% of the total cost of the project will be funded by the European Union – NextGenerationEU under the National Recovery and Resilience Plan of Bulgaria.

Further details of the funding:

• Name of the procedure: “Support for new renewable electricity generation and electricity storage capacities with an installed capacity of more than 200 kW” (Call 2)
• Procedure code: BG-RRP-4.033
• Number of grant agreement contract: BG-RRP-4.033-0036-C01
• Title of the project: “Development of combined project “St. George” for new capacities for production of electricity from PV sources with total installed power of 199MW and storage of electricity with total installed power of 90 MW together with installed local storage capacity of 239.78 MWh located in the municipality of Silistra