In 2025, Slovenia experienced a significant shift in its electricity market dynamics, marked by a notable increase in reliance on foreign electricity supplies. This change was primarily driven by a sharp decline in domestic hydropower generation, which has traditionally been a cornerstone of Slovenia’s energy portfolio.
Data from Borzen indicates that the country’s electricity exports, excluding output from the Croatian share of the Krško nuclear power plant, amounted to 10,498 GWh in 2025. This figure reflects a 7% decrease compared to the previous year. Conversely, electricity imports surged by 9.8%, reaching a total of 12,809 GWh.
The net balance of cross-border electricity flows for Slovenia revealed a net import of 2,311 GWh for the year, confirming its status as a net buyer in international markets throughout 2025. This marks a stark contrast to 2024 when Slovenia recorded only a modest net inflow of 369 GWh, highlighting an over fivefold increase in net imports year-on-year.
The drastic rise in net imports can be attributed mainly to a significant reduction in total domestic electricity generation, which declined by more than 14%. Hydropower generation was particularly affected; after experiencing favorable hydrological conditions in 2024 that supported higher output levels, production fell by nearly a quarter in 2025 due to weaker water inflows. As a result, Slovenia was compelled to increase its electricity purchases from abroad to meet demand.
