Massive BESS Applications in the PSE Pipeline

Poland’s transmission grid connection pipeline is undergoing a significant transformation, with large-scale battery energy storage systems (BESS) dominating the queue. According to the latest data from Polskie Sieci Elektroenergetyczne (PSE) as of July 31, 2026, hundreds of megawatts of BESS projects are actively seeking transmission grid access, signaling a robust shift towards grid flexibility and storage integration.

Gigawatt-Scale Projects Lead the Queue

Leading the charge is ENERGA Storage, which has submitted applications for a colossal 1 GW BESS project at Choczewo, boasting a 1.2 GW charge/discharge capacity. Additionally, the developer is pursuing a 400 MW BESS project at Olsztyn Mątki with a 480 MW charge/discharge capacity. Other major pending applications include the RSE 11 project (400 MW), ESVJ-1 (402 MW), and PGE Inwest 25 (401 MW), illustrating the sheer scale of investor interest in the Polish storage market.

"Poland's grid queue increasingly reflects a trend of developing generation and flexibility together, moving beyond standalone storage to integrated energy hubs."

The Rise of Solar-Plus-Storage Hybrids

Alongside standalone BESS, the PSE pipeline highlights a growing trend of co-locating generation and storage. Notable hybrid applications include Solar-Ledno's 500 MW project near Leśniów, which pairs approximately 250 MW of solar PV with battery storage. Similarly, Europejska Grupa Energetyczna’s Besiekierz project encompasses nearly 400 MW of PV and almost 400 MW of battery charge/discharge capacity.

This hybrid approach allows developers to optimize grid connections, mitigate curtailment risks, and maximize revenue through energy arbitrage. As Poland accelerates its energy transition, the dominance of BESS and solar-plus-storage projects in the grid queue underscores the market's recognition of storage as an indispensable component for integrating high shares of variable renewable energy.

Source: Voice of Renewables

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