In 2025, Slovenia experienced a significant increase in its reliance on foreign electricity sources, driven by a notable decrease in domestic hydropower output. This shift highlights the country’s growing vulnerability to external energy markets amid changing climatic conditions.
Data from Borzen indicates that Slovenia’s electricity exports, excluding contributions from the Croatian segment of the Krško nuclear power plant, amounted to 10,498 GWh in 2025, reflecting a 7% decline from the previous year. In contrast, electricity imports surged by 9.8%, reaching a total of 12,809 GWh.
This dramatic rise in net imports resulted in a net import balance of 2,311 GWh for Slovenia’s regulatory area, confirming its status as a net buyer in international electricity markets throughout the year. This marks a stark contrast to 2024, when Slovenia recorded a modest net inflow of just 369 GWh, illustrating a more than fivefold increase in net imports year-on-year.
The underlying factors contributing to this surge include a significant reduction in total domestic electricity generation, which fell by over 14%. Hydropower was particularly affected; following favorable hydrological conditions in 2024 that bolstered production, 2025 saw weaker water inflows leading to a nearly 25% decline in hydropower generation. Consequently, Slovenia was compelled to increase its electricity purchases from abroad to meet demand.
