From October 2025 through September 2026, low-carbon sources supplied more than three-quarters of Slovenia’s electricity consumption. Nuclear was the largest source at about 40%, followed by hydropower at almost 24%, solar at 12%, and biofuels at nearly 2%. Fossil fuels supplied about 18%: coal accounted for roughly 10% and gas for 7%. Net imports covered the remaining 5%, with their generation mix unspecified. Slovenia therefore has a strong clean electricity foundation, although replacing fossil generation would further reduce climate-changing emissions and air pollution.

Is Electricity Growing in Slovenia?

Slovenia’s electricity consumption is well below its historical peak, although these figures alone do not establish whether it grew in the latest year. The latest 2026 figure is about 6,520 kWh per person, compared with the 2014 record of roughly 8,470 kWh—a decline of about 1,950 kWh, or 23%. Low-carbon electricity generation is also below its record, at around 5,040 kWh per person versus 6,440 kWh in 2014, a decrease of roughly 1,400 kWh, or 22%. These shortfalls are concerning: expanding clean electricity production would help Slovenia meet future demand from electrification and AI rather than merely remain below earlier highs.

Suggestions

Slovenia should build on its existing nuclear and solar generation by expanding nuclear capacity and accelerating solar deployment on rooftops and suitable larger sites. Nearby Slovakia, where nuclear supplies 66% of electricity generation, and France, at 67%, provide relevant examples of nuclear’s potential to underpin a low-carbon electricity system. Hungary’s 23% solar share and North Macedonia’s 40% demonstrate how much further solar can grow in the region. Wind could add another clean source: neighboring Croatia generates 15% of its electricity from wind, while Austria generates 12%. These examples offer useful reference points, not automatic targets; Slovenia should combine generation expansion with grid investment to support rising electricity demand.

History

Slovenia’s low-carbon electricity history shows substantial gains interrupted by repeated setbacks. In the early 1990s, hydropower rose by 0.7 TWh in 1991, while nuclear generation fell by 1 TWh in 1992 before recovering 0.7 TWh in 1994. Hydropower expanded again in the 2000s, gaining 1.1 TWh in 2004 and a combined 1.5 TWh in 2008–2009. The early 2010s were uneven: hydro fell by 1 TWh in 2011, then gained a combined 2.2 TWh in 2013–2014; nuclear fell by 0.7 TWh in 2012 before adding 1.1 TWh in 2014. The following year brought sharp reversals of 2.3 TWh for hydro and 0.7 TWh for nuclear. Such losses of clean output underscore the importance of sustained generation growth. Hydro then fluctuated through 2016–2018, fell by 1.6 TWh in 2022, rebounded by 1.9 TWh in 2023, and declined again by 1.3 TWh in 2025 and 0.9 TWh in 2026. Expanding nuclear and solar would help Slovenia move beyond these setbacks toward sustained clean electricity growth.

Electricity Imports and Exports

Balance of Trade

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