BESS obligations peaked at 2.5 GW in 2024 then fell to 685 MW as the de-rating factor collapsed to 13%

Capacity obligation awarded in Poland's main auction by technology (GW) and BESS de-rating factor (%)
Source: PSE, Modo Energy
Note: Bars show capacity obligations (derated MW). De-rating is the BESS-specific correction availability factor set by PSE. Auction years 2022 to 2025 correspond to delivery years 2027 to 2030.
MODOENERGY