Construction underway at one of Poland’s largest battery storage projects

Construction work has begun at the 150 MW/300 MWh Jedwabno BESS project site in Poland, one of the largest projects to date in an emerging market for utility-scale battery storage.

Developer R.Power announced civil works are now underway at the site, with construction led by appointed contractor Nomad Electric – the dedicated EPC arm of Nomad Electric Goup.

The 150 MW/300 MWh Jedwabno BESS is thought to be one of the largest energy storage projects currently under construction in Poland. The BESS project is scheduled for completion at the end of 2016 and has already secured revenues through a 17-year contract in Poland’s capacity market auction, as well as a long-term optimization agreement with Axpo.

Marcin Pajewski, chief technical officer at R.Power said the developer was pleased to be making “strong headway” on construction having laid the groundwork for Jedwabno on the commercial front.

R.Power has now connected more than 1 GW of renewables and energy storage capacity spanning Poland, Portugal and Romania, 800 MW of which remains within the company’s operational independent power producer (IPP) portfolio. A further 585 MW is currently under construction across Poland, Portugal, Romania and Germany according to the IPP.

Breaking ground at Jedwabno is expected to be soon followed by construction works commencing at the 127 MW/254 MWh Scornicesti BESS in Romania. R.Power has signed an EPC agreement for the site which is scheduled to enter construction in the second quarter of 2026.

Development of larger-scale energy storage projects represents a shift in approach for R.Power according to Pajewski, which previously operated a higher volume model across smaller projects.

“At the peak of our construction activity in 2023, we were connecting a new project to the grid almost every other day,” Pajewski said. “Now we are turning the same expertise to larger, more technically complex projects that will form the backbone of our pan-European, multi-technology portfolio.”

R.Power reports it connected 53 renewables and BESS projects to the grid in 2025, with a further 10 connected in the first three months of 2026.