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Sungrow and Sunotec Commission a 150 MW / 600 MWh Battery Storage Project in Bulgaria

On June 12, 2026, Sungrow, a leading global provider of solar inverters and energy storage systems, along with its partner Sunotec, completed the commissioning of a 150 MW / 600 MWh battery energy storage system (BESS) in Nova Zagora, Bulgaria. Developed by Enery, a prominent independent power producer in Central and Eastern Europe, this project signifies a critical milestone in the region's energy transition.

Background of the Project

The newly commissioned battery storage system is part of a larger initiative backed by the Bulgarian Ministry of Energy’s national RESTORE program. Utilizing Sungrow’s innovative liquid-cooled ESS technology, PowerTitan 2.0, the facility aims to support the integration of renewable energy into Bulgaria's power grid, enhancing the overall flexibility and resilience of the energy supply.

Anastasios Gkinis, Vice President at Sungrow Europe, expressed enthusiasm about the project’s impact, stating, “This project reflects the pace at which storage is becoming integral to energy systems in Southeast Europe. With PowerTitan 2.0, we’re delivering a solution that supports grid stability while helping unlock the next phase of clean energy deployment.”

The Significance of the Battery Storage System

The battery storage system is expected to play a crucial role in increasing grid flexibility, enabling better management of renewable energy resources. Importantly, this installation marks the first significant achievement under the broader energy storage collaboration between Sungrow and Sunotec, which anticipates the development of up to 800 MWh of battery storage capacity in the Nova Zagora region.

Kaloyan Velichkov, founder and CEO of Sunotec, highlighted the importance of strategic planning for future energy needs: “Together with Sungrow, we are advancing one of Bulgaria’s most significant storage programs. Our integrated approach creates value and is essential for fortifying Bulgaria's energy grid.”

Petya Dimova, Head of Enery Portfolio Optimization, commented on the project's potential. She noted that the commercial operation at Nova Zagora represents the start of a journey toward creating substantial value for the asset. The battery system will provide essential flexibility to the grid while facilitating the efficient integration of renewables into everyday energy supplies.

Future Expansion Plans

The Nova Zagora project is set within a broader portfolio of energy storage initiatives that Sungrow and Sunotec are executing in Bulgaria. Over the next two months, an additional battery storage capacity of 2.2 GWh is scheduled to come online, raising the total expected capacity to 3 GWh by the end of 2026. Upcoming projects include a hybrid BESS and PV initiative known as Knizhnovik Phase 1, which will have a capacity of 100 MW / 200 MWh, developed by Enery.

What sets the Nova Zagora facility apart is its full compliance with national grid regulations, signifying a significant leap for utility-scale stand-alone battery storage installations in the country.

Cutting-Edge Technology: PowerTitan 2.0

The core technology of the Nova Zagora project is Sungrow's PowerTitan 2.0. This cutting-edge liquid-cooled solution is designed for optimal land usage and facilitates rapid deployment with enhanced operational safety and cost-efficiency. It has already been successfully deployed in various European markets, proving its capability in diverse grid and market conditions. Moreover, this project aligns with the Bulgarian RESTORE program's goals, contributing to energy security and expediting the incorporation of renewable energy into the national grid.

Conclusion

Sungrow, with over 29 years in renewable energy technology, and Sunotec, an international system integrator, are at the forefront of transforming energy landscapes in Bulgaria and beyond. With their collaborative initiatives and commitment to sustainability, these projects not only enhance power stability but also encourage the responsible use of clean energy. The commissioning of this substantial battery storage facility is a testament to the innovation and teamwork essential for navigating the future of energy.

About the Companies

• - Sungrow has installed over 1000 GW of power electronic converters globally, recognized as the most bankable PV inverter and energy storage firm by BloombergNEF. For more details, visit their website at sungrowpower.com.
• - Sunotec, specializing in renewable energy infrastructure, has delivered over 680 photovoltaic installations with a collective capacity exceeding 15 gigawatts. More about Sunotec can be found at sunotec-group.com.
• - Enery, committed to offering reliable green energy solutions, operates a diverse portfolio generating over 766 GWh of clean electricity annually. They have a pipeline of nearly 10 GW across Central and Eastern Europe. Visit enery.eu for more details.