Massive BESS Construction Begins in Siedlce

Greenvolt Power has officially launched the construction of a 600MW/2.4GWh battery energy storage system (BESS) in Siedlce, Poland. Upon completion by the end of 2027, this facility will become Poland's largest BESS and one of Europe's leading large-scale energy storage projects. The project is supported by key industry players, with P&Q responsible for grid connection to the 400 kV network operated by Polish TSO PSE, and ONDE handling the substation and civil engineering.

BYD Supplies Core Battery Systems

BYD Energy Storage is supplying the core battery systems for the Siedlce project. The system utilizes BYD's Haohan energy storage system, equipped with 2710Ah blade batteries, comprising 210 battery containers and 105 transformer containers. This delivery builds upon previous 2025 agreements for the Turosn Koscielna and Nowa Wies Elcka projects, each at 800MWh. Consequently, the cumulative BESS cooperation between BYD and Greenvolt in Poland has now reached an impressive 4GWh.

Securing Returns via Capacity Market

The Siedlce project secures long-term financial returns through Poland's capacity market mechanism, allowing storage facilities to earn fixed income via capacity auctions. Greenvolt currently boasts a 4.6GW probability-weighted BESS pipeline, with 2.4GW located in Poland. With the Turosn Koscielna project already operational as of July 2026 and the Elk project set for Q4 2026, Greenvolt's total Polish operational capacity will soon reach 1GW/4GWh.

This massive expansion is crucial as Poland, one of the largest electricity markets in Central and Eastern Europe, plays a pivotal role in meeting regional and EU targets. The integration of such large-scale storage will significantly enhance grid stability and facilitate the transition to renewable energy sources across the region.

Poland is entering an accelerated period of large-scale battery energy storage facility construction, aligning with the broader commitment of 22 EU member states to add 45GW of energy storage capacity by 2028.

Source: Seetaoe

This article was assisted by AI analysis. Please refer to the original source for official information.