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 integration and Southeast Europe’s clean energy transition.
The project has been developed and is owned by Enery, while financing was secured through Bulgaria’s national RESTORE programme administered by the Ministry of Energy.
The facility deploys Sungrow’s PowerTitan 2.0 liquid-cooled battery storage technology.
The Nova Zagora installation represents the first major achievement under a broader energy storage partnership announced by Sungrow and Sunotec at the 2025 Intersolar exhibition. The collaboration initially targets up to 800 MWh of battery storage capacity in the Nova Zagora region, with plans currently being evaluated to expand the programme to as much as 1 GWh.
The project is also among the first utility-scale standalone battery storage facilities in Bulgaria to fully comply with national grid requirements.
3 GWh Storage Pipeline Planned By End-2026
The Nova Zagora facility forms part of a much larger battery storage pipeline being developed jointly by Sungrow and Sunotec across Bulgaria.
Over the next two months, the partners plan to bring an additional 2.2 GWh of battery storage capacity online. By the end of 2026, total commissioned capacity under the programme is expected to reach 3 GWh.
Among the upcoming developments is the Knizhnovik Phase 1 project, a hybrid solar-plus-storage facility being developed by Enery with a planned capacity of 100 MW/200 MWh.
The partners said the phased rollout of 3 GWh of battery storage capacity will contribute significantly to renewable energy integration and grid stability across the region.
PowerTitan 2.0 Technology Enhances Grid Stability
The Nova Zagora project is powered by Sungrow’s PowerTitan 2.0 liquid-cooled energy storage system, which helps reduce land requirements and supports faster project deployment.
The platform uses advanced thermal management technology to maintain safe operating temperatures, improve system efficiency, and enhance overall reliability. Sungrow said PowerTitan 2.0 has been successfully deployed in several European markets and has delivered stable performance across different grid conditions.
Sungrow, a global renewable energy technology company with nearly 30 years of experience, has installed more than 1,000 GW of power electronic converters worldwide as of December 2025.
Electrify your feed! Click here to join our Whatsapp group and to get the latest updates, expert insights, and innovations driving India’s energy storage revolution.
