In 2025, Slovenia became significantly more dependent on foreign electricity supplies, as net imports rose sharply compared to 2024. This shift was primarily caused by a substantial drop in domestic hydropower generation.
According to data from Borzen, electricity exports, excluding output from the Croatian share of the Krško nuclear power plant, totaled 10,498 GWh in 2025, marking a 7 % decrease from the previous year. Meanwhile, imports climbed 9.8 %, reaching 12,809 GWh.
As a result, the net balance of cross-border electricity flows in Slovenia’s regulatory area showed a net import of 2,311 GWh, confirming that the country remained a net buyer on international markets throughout the year.
The surge in net imports is especially notable compared to 2024, when Slovenia recorded a modest net inflow of 369 GWh, representing a more than fivefold increase year-on-year. The primary cause was a reduction in total domestic generation, which fell by over 14 %, with hydropower playing a decisive role. Favorable hydrological conditions in 2024 had supported output, but in 2025, weaker water inflows caused hydropower production to decline by nearly a quarter, forcing Slovenia to compensate with higher electricity purchases from abroad.
