Greenvolt begins building 600 MW/2.4 GWh BESS in Poland
Greenvolt Power has commenced construction of a 600 MW/2.4 GWh battery energy storage system in Siedlce, Poland, with commercial operations expected by the end of 2027. The project, which utilizes BYD Energy Storage technology, aims to enhance grid flexibility and support the integration of renewable energy sources. Upon completion, this facility will contribute to Greenvolt's total Polish portfolio reaching 1 GW of power capacity and 4 GWh of storage.
- ▪Greenvolt Power started building a 600 MW/2.4 GWh BESS in Siedlce, Poland, targeting commercial operation by late 2027.
- ▪BYD Energy Storage is supplying the battery technology for the project, which includes 210 battery containers and 105 transformer containers.
- ▪The facility will connect to the Polskie Sieci Elektroenergetyczne transmission network at 400 kV via a new substation and cable links.
- ▪Once operational, the Siedlce project will help Greenvolt reach a total of 1 GW of battery power capacity and 4 GWh of storage in Poland.
- ▪The project is designed to charge during high renewable generation periods and discharge during peak demand to balance the grid.
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| Original publisher | Energy Storage |
| Canonical URL | https://www.ess-news.com/2026/09/25/greenvolt-begins-building-600-mw-2-4-gwh-bess-in-poland/ |
| Publication time | Mon, 05 Oct 2026 18:38:01 +0000 |
| Retrieval time | 2026-10-05T19:59:57.191Z |
| Last seen | 2026-10-05T20:00:06.033Z |
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Greenvolt Power has started construction of a 600 MW/2.4 GWh BESS in Siedlce, Poland. It said it expects to begin commercial operations by the end of 2027. BYD Energy Storage will supply the battery technology. The project will use 210 battery containers and 105 transformer containers equipped with power conversion systems to transfer electricity between the batteries and the grid. P&Q will connect the BESS to the transmission network operated by Polskie Sieci Elektroenergetyczne (PSE) at 400 kV. The connection works include a new 400/110 kV substation and 400 kV and 110 kV cable links. The facility will charge during periods of high renewable generation and discharge when electricity demand rises.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Energy Storage.
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