GEN-I accelerates international growth: takes over management of 200 MW of battery energy storage systems in Bulgaria and announces a doubling of capacity

GEN-I is strengthening its position as a leading provider of battery storage asset management and market optimisation services in Central and Southeastern Europe. By taking over two large-scale battery storage projects in Bulgaria and signing an agreement for nine additional projects, the company will double its managed battery storage capacity in Bulgaria within the next year.

Core Services Provided As the exclusive partner for asset optimisation and energy trading, GEN-I provides comprehensive commercial management services, including:

• Access to electricity markets
• Balancing services
• Market optimisation
• Minimum guaranteed revenue levels (assuming associated market risks)

Current BESS Projects in Bulgaria Developed and constructed by SUNOTEC, both facilities are connected to the electricity grid, featuring a combined capacity of 200 MW output and 505 MWh storage:

• Brusartsi: 150 MW output capacity / 379 MWh storage capacity
• Byala Slatina: 50 MW output capacity / 126 MWh storage capacity

Strategic Partnership & Future Expansion Building on their cooperation, GEN-I and SUNOTEC have signed a broader agreement covering nine additional BESS projects:

• Capacity: 195 MW combined output / 782 MWh storage capacity
• Timeline: Expected to enter full commercial operation within the next 12 months

Executive Quote

"Our partnership with SUNOTEC confirms that GEN-I is establishing itself as one of the leading providers of commercial management and market optimisation services for battery energy storage systems in the region. The projects in Bulgaria represent an important milestone in our international growth strategy while also demonstrating our partners’ confidence in our expertise, technology and trading capabilities. With the accelerated international expansion of our portfolio, we expect to exceed 800 MW of battery storage capacity under our management, based on signed contracts, by the end of 2026."

— Igor Koprivnikar, Ph.D., MBA, Member of the Management Board of GEN-I d.o.o.

About the Companies

• GEN-I: Named the leading power and energy commodities trader in Central, Eastern, and Southeastern Europe for the second consecutive year (Energy Risk Commodity Rankings 2026). Operates across 27 countries with global market access and regional market expertise.
• SUNOTEC: Specialises in turnkey energy infrastructure, employing over 2,000 people worldwide. Headquartered in Sofia, with offices in Munich and London.