Sineng Electric Delivers PCS for Bulgaria's Largest Energy Storage Project in Eastern Europe (602MWh)

en.Wedoany.com Reported - Sineng Electric has delivered multiple 6.9 MW centralized PCS medium-voltage turnkey stations for the Burgas BESS project in Bulgaria, supporting a 150 MW/300 MWh energy storage system. With a total capacity of 602 MWh, this is the largest operational battery energy storage facility in Eastern Europe to date.

The project was executed by Solarpro Technology, one of Europe's EPC and O&M contractors. Once operational, it will increase Bulgaria's total installed energy storage capacity by 10%, providing balancing capabilities for large-scale wind and solar power generation while enhancing the stability, flexibility, and reliability of the national grid.

Within the 150 MW/300 MWh energy storage system, Sineng Electric's supplied 6.9 MW centralized PCS medium-voltage turnkey stations integrate four EH-1725-HA-UD centralized PCS units, one transformer, and a ring main unit (RMU) in a compact layout. This storage solution supports 1, 2, 4, 6, and 8-hour storage durations, accommodating diverse project requirements. By reducing the number of parallel connections by 50%, the PCS optimizes system design and improves operational reliability. The modular design facilitates maintenance and minimizes downtime, helping maintain high system availability throughout the project lifecycle.

This standalone battery energy storage facility provides grid services including peak shaving, load shifting, frequency containment reserve (FCR), and automatic frequency restoration reserve (aFRR), storing electricity during low-demand periods and discharging during peak hours to enhance energy efficiency, support grid balancing, and facilitate renewable energy integration. The PCS features full four-quadrant reactive power output capability and grid-forming functionality, delivering enhanced voltage support and rapid dynamic response to strengthen system resilience. It also provides a scalable demonstration model for renewable energy grid integration and grid modernization across Eastern Europe.

Rock Li, General Manager of Sineng Electric's European region, stated that as renewable energy penetration continues to rise, large-scale energy storage is becoming a fundamental component of future power systems. Sineng Electric is pleased to deliver the 6.9 MW centralized PCS medium-voltage turnkey stations and grid-forming technology for this significant project to enhance Bulgaria's energy security and grid flexibility.

The Burgas BESS is a landmark project in Bulgaria's clean energy transition and reflects the critical role of energy storage in building more flexible and reliable power systems. Sineng Electric will continue to advance the development of grid-forming energy storage solutions to support the global energy transition and a zero-carbon future.

Sineng Electric's business covers photovoltaic inverters, energy storage PCS, hydrogen power supply systems, and power quality products. The company has been rated as a Tier 1 PV inverter and PCS manufacturer by BloombergNEF, with PV inverter shipments ranking third globally and energy storage PCS shipments ranking among the top five worldwide.

Solarpro Technology, the project executor, is a multi-technology integrator with business spanning photovoltaics, wind power, battery energy storage systems, and hydrogen solutions. With a team of over 1,000 people and 15 years of EPC experience, it has designed, built, and integrated PV power plants with a total capacity exceeding 14 GW.