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 roughly 2%. Fossil fuels supplied around 18%, including coal at about 10% and gas at just over 7%, while net imports covered nearly 5%. 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 latest figures do not show growth relative to its historical peak. Electricity consumption in 2026 stood at about 6,520 kWh per person, roughly 1,950 kWh—or 23%—below the record of 8,471 kWh set in 2014. Low-carbon electricity generation was approximately 5,040 kWh per person, around 1,400 kWh—or 22%—below its own 2014 record. These shortfalls are concerning as electrification and AI create additional electricity demand. However, comparing the latest figures with a historical record does not establish whether consumption or generation increased or decreased in the most recent year.

Suggestions

Slovenia should build on its substantial nuclear and solar generation by expanding both technologies, alongside the grid capacity needed to deliver more clean electricity. Nearby Slovakia, where nuclear supplies 66% of electricity generation, and France, at 67%, offer relevant examples of a much larger nuclear contribution. For solar, Slovenia can learn from Hungary, where it supplies 23% of generation, and North Macedonia, where it reaches 40%. These regional examples demonstrate scope to raise solar’s contribution well beyond Slovenia’s current 12%, while additional nuclear generation would strengthen its already substantial low-carbon foundation.

History

Slovenia’s low-carbon electricity history shows repeated gains interrupted by substantial 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—a disappointing loss of clean output followed by only a partial recovery. Hydropower then recorded gains of 1.1 TWh in 2004, 0.8 TWh in 2008 and 0.7 TWh in 2009. The 2010s were particularly uneven: hydro fell by 1 TWh in 2011, then rose by 0.8 TWh in 2013 and 1.4 TWh in 2014, before dropping sharply by 2.3 TWh in 2015. Nuclear added 1.1 TWh in 2014, but declines of 0.7 TWh in both 2012 and 2015 were serious setbacks to clean electricity supply. Hydro subsequently gained 0.7 TWh in 2016, lost 0.6 TWh in 2017 and gained 0.8 TWh in 2018. More recently, a 1.6 TWh hydro decline in 2022 was followed by a welcome 1.9 TWh rebound in 2023, but further losses of 1.3 TWh in 2025 and 0.9 TWh in 2026 reinforce the need for sustained expansion of nuclear and solar generation.

Electricity Imports and Exports

Balance of Trade

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