Sungrow and Sunotec have launched a 150 MW/600 MWh battery storage facility in Nova Zagora, Bulgaria. Developed by Enery, the project is among the country's largest BESS installations and forms part of a planned 3 GWh storage pipeline by 2026. 8-hour duration) NAS battery-based energy storage system (ESS) has gone into operation at the. MUNICH and SOFIA, Bulgaria, June 12, 2026 /PRNewswire/ -- Sungrow, a globally leading provider of PV inverters and energy storage systems (ESS), together with its partner Sunotec, an international integrator of large-scale renewable energy infrastructure, has successfully commissioned a 150 MW /. Sungrow and Sunotec have successfully commissioned a 150 MW/600 MWh battery energy storage system (BESS) in Nova Zagora, Bulgaria. The large-scale energy storage facility is among the biggest of its kind in the country and represents a major milestone in supporting Bulgaria's renewable energy. This paper describes the basic features of sodium sulfur battery and summarizes the recent development of sodium sulfur battery and its applications in stationary energy storage. The final decision, announced on April 17, 2025, concludes a competitive selection process that began with 151 proposals in August 2024.
