Poland added 3.6 GW of new solar capacity in 2025, according to data compiled by Agencja Rynku Energii (ARE) on behalf of the country’s Ministry of Energy. The result marks a decline from the 4 GW installed in 2024 and brings Poland’s cumulative solar capacity to 24.8 GW.
However, separate figures from Poland’s transmission system operator, Polskie Sieci Elektroenergetyczne (PSE), indicate that total installed solar capacity had reached 25.5 GW by the end of 2025.
Grzegorz Wiśniewski, founder and director of the Institute for Renewable Energy (IEO), attributed the discrepancy to timing differences in data reporting. He explained that several large PV farms connected to the grid in December were included in PSE’s statistics, while ARE is expected to account for those projects in its 2026 figures.
C&I and Utility-Scale Drive Installations
ARE’s data shows that more than half of 2025’s new capacity came from solar installations ranging between 50 kW and 10 MW. This segment includes commercial and industrial (C&I) systems as well as larger PV plants connected to medium- and high-voltage grids.
In contrast, the prosumer segment—systems below 50 kW—experienced a slowdown. Installations in this category totaled just under 1 GW in 2025, compared with 1.3 GW in 2024.
Large-Scale Solar Pipeline Remains Strong
According to Wiśniewski, Poland’s large-scale solar market began developing roughly a decade ago and continues to expand. By the end of 2025, IEO’s project database recorded 7,703 projects holding grid connection permits, representing a combined capacity exceeding 33 GW.
Of these, 5,895 projects, totaling 13.8 GW, have already signed grid connection agreements with operators.
Solar Generation and Curtailment
Data from the European transmission system operators’ network, ENTSO-E, shows that PV installations in Poland delivered 19.2 TWh of electricity to the grid in 2025, accounting for 12.5% of the country’s total power generation.
Despite this growth, more than 1 TWh of combined solar and wind generation was curtailed during the year, highlighting ongoing grid integration challenges as renewable penetration increases.
