From November 2025 through October 2026, low-carbon sources supplied about 80% of Slovenia’s electricity consumption. Nuclear was the largest source at around 43%, followed by hydropower at 23%, solar at 12% and biofuels at about 2%. Fossil fuels supplied around 17%, comprising roughly 9% coal and 7% gas. Net imports covered the remaining 3%. Slovenia therefore has a predominantly clean electricity supply, with nuclear providing its foundation, but further low-carbon generation could replace fossil electricity and reduce the associated climate impacts and air pollution.

Is Electricity Growing in Slovenia?

Slovenia’s latest figures do not show growth beyond its historical electricity consumption record. Electricity consumption in 2026 was about 6,490 kWh per person, roughly 1,980 kWh, or 23%, below the 2014 peak of 8,471 kWh. Low-carbon electricity generation reached about 5,190 kWh per person, around 1,250 kWh, or 19%, below its own 2014 record. These gaps are concerning: a high clean electricity share should be accompanied by growing clean electricity output to support electrification and future demand, including from AI. However, comparison with historical peaks alone does not establish whether consumption or generation increased in the latest year.

Suggestions

Slovenia can build on its strengths by expanding nuclear and solar electricity generation. Slovakia and France, where nuclear supplies around two-thirds of electricity generation, offer useful examples of the substantial role nuclear can play in a low-carbon system. For solar, nearby Hungary generates almost a quarter of its electricity from this source, while North Macedonia reaches about 40%, demonstrating scope for a larger solar contribution in the region. Wind could add another clean source: neighbouring Croatia generates about 14% of its electricity from wind, and Austria about 12%. Learning from these regions while expanding grid capacity would help Slovenia increase clean electricity production and meet growing demand with less reliance on fossil fuels.

History

Slovenia’s low-carbon electricity history shows substantial gains alongside repeated setbacks. In the early 1990s, hydropower increased by 0.7 TWh in 1991, while nuclear generation fell by 1 TWh in 1992 before recovering 0.7 TWh in 1994. Hydropower then recorded gains of 1.1 TWh in 2004 and a combined 1.5 TWh in 2008–2009. The 2010s were particularly uneven: hydro fell by 1 TWh in 2011, rose by a combined 2.2 TWh in 2013–2014, and dropped sharply by 2.3 TWh in 2015, followed by smaller gains and losses through 2018. Nuclear output declined by 0.7 TWh in both 2012 and 2015, interrupting progress despite a strong 1.1 TWh increase in 2014; restoring and expanding that clean contribution should be a priority. More recently, hydropower fell by 1.6 TWh in 2022, rebounded by 1.9 TWh in 2023, then declined by 1.3 TWh in 2025 and another 1.1 TWh in 2026. These recent losses reinforce the need for sustained expansion of nuclear, solar and other low-carbon electricity generation.

Electricity Imports and Exports

Balance of Trade

* 12M = Last 12 months (Nov 2025 – Oct 2026) — a rolling 12-month period, not a calendar year.