/SOFIA, BULGARIA, May 6, 2026, 10:45 CEST, RENEWABLE MARKET WATCH™/
Enery has officially commissioned the Nova Zagora Battery Energy Storage System (BESS), now recognised as the largest battery energy storage facility in Central and Eastern Europe. Boasting a total storage capacity of 601.8 MWh and a power output of 150 MW, this landmark project represents a significant advancement in Bulgaria’s energy sector. The facility delivers key grid stabilisation services and plays a pivotal role in supporting the large-scale integration of renewable energy sources, positioning Bulgaria as a regional leader in energy transition. The successful launch of the Nova Zagora BESS is a strategic move towards enhancing flexibility and resilience within Bulgaria’s energy infrastructure. By bolstering grid stability, the facility unlocks new avenues for renewable energy integration nationwide, enabling a more diversified and reliable electricity supply for consumers and industry stakeholders.
Developed over recent months in southeastern Bulgaria, this project introduces a transformative asset to the nation’s energy infrastructure. As a cornerstone of Bulgaria’s renewable energy roadmap, the Nova Zagora BESS is instrumental in ensuring reliable, cost-effective electricity supplies amid increasingly dynamic market conditions. Scheduled to begin commercial operations in March 2026, the system is designed to facilitate the scaled deployment of renewable energy assets throughout the region, addressing both current and future energy demands.
The launch of this advanced battery storage facility underscores Enery’s commitment to driving innovation in energy management. By enhancing system stability and operational flexibility, the Nova Zagora BESS creates significant value for Bulgaria’s evolving renewable energy market and supports the country’s objectives for energy independence and sustainability. Purpose-built as an independent battery storage installation, the Nova Zagora facility establishes a new benchmark for utility-scale BESS projects in Central and Eastern Europe, setting the standard for future developments in the region.
Key Technical Data of the Nova Zagora BESS Plant:
* Total Capacity: 601.8 MWh
* Power Output: 150 MW
* Infrastructure: 120 containers (5.015 MWh each)
* Grid Connection: On-site 33/110 kV substation
* Transformer Capacity: 150 MVA with 30 individual transformer stations (5.140 MVA each)
“Delivering the Nova Zagora BESS requires precise coordination of multiple construction and electrical work streams,” explains Dimcho Dimov, Site Manager and Head of Monitoring Control Room. “Seeing these components come together into a fully functioning facility that supports grid stability is extremely rewarding.”
The financial underpinning of the Nova Zagora BESS is secured through a dedicated green financing package provided by DSK Bank AD, strategically structured to support sustainable energy infrastructure investments. This financing arrangement not only demonstrates investor confidence in the project’s business model but also aligns with broader ESG objectives and the transition to a low-carbon economy.
To ensure revenue certainty and long-term operational stability, Enery has entered into a Virtual Power Purchase Agreement (VPPA) with Vitol, a global leader in energy trading. This commercial arrangement delivers predictable cash flows and underscores the facility’s strategic relevance in the European energy marketplace. In addition to its financial and technical strengths, the project leveraged local supply chains and workforce, engaging numerous regional companies and skilled professionals throughout the construction phase to maximize economic impact and knowledge transfer.
The Nova Zagora BESS extends its influence beyond energy system benefits, generating substantial socio-economic value for the region. As part of Enery’s long-term strategy, this facility is integral to accelerating the expansion of renewable energy across Central and Eastern Europe and advancing innovative solutions for grid integration, operational optimisation, and regional energy independence.
Stoyan Petrov, Head of O&M at Enery Bulgaria, sees projects like Nova Zagora BESS as a key step: “From an operations and maintenance perspective, large-scale battery storage adds a new dimension to how we manage energy assets. Integrating advanced technologies such as BESS will play a key role in ensuring reliable, efficient and future-ready energy infrastructure.”
Valentin Valkov, Project Manager, concludes: “Nova Zagora BESS is an exciting project because it represents the future of energy systems. Being part of a project that combines technical complexity, innovation and real impact on the energy sector makes the work highly motivating.”
For more information and answers to your questions about the Bulgarian battery energy storage system (BESS) market and related content, you may read here: Bulgaria Solar Photovoltaic (PV) and Battery Energy Storage System Market Outlooks 2025 – 2034
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