Slovenia Nuclear Power: Generation, Share and Trend
Slovenia generated 5.84 TWh of electricity from nuclear in 2025, 39.4% of its total, according to Ember. That made it the 28th largest nuclear power producer in 2025 of the 32 countries with Ember data, comparing each country's latest year. Nuclear supplied 8.9% of the world's electricity in 2025. These are annual statistics for 2025, with monthly figures through August 2026; they are compiled from national sources and are not real time.
Key Facts
- Slovenia generated 5.84 TWh of electricity from nuclear in 2025.
- Nuclear supplied 39.4% of Slovenia's electricity in 2025.
- Slovenia was the 28th largest nuclear power producer in 2025 among the 32 countries with Ember data, comparing each country's latest year.
- Slovenia's nuclear generation in 2025 was 8% lower than in 2020, when it was 6.35 TWh.
- Slovenia's nuclear generation in 2025 was 3% higher than in 2015, when it was 5.65 TWh.
- Slovenia's nuclear generation peaked at 6.37 TWh in 2014.
- Slovenia's nuclear share in 2025 was above the world share of 8.9%.
- Slovenia had 700 MW of nuclear generating capacity in 2025.
Key Figures, 2025
| Measure | Value | As of / source |
|---|---|---|
| Nuclear generation | 5.84 TWh | 2025 · Ember |
| Share of Slovenia's electricity | 39.4% | 2025 · Ember |
| World share of nuclear | 8.9% | 2025 · Ember |
| Rank by nuclear generation (each country's latest year) | 28 of 32 | 2025 · Ember |
| Nuclear capacity | 700 MW | 2025 · Ember |
Nuclear Generation Year by Year
Ember annual statistics, 1990 to 2025Annual statistics through 2025, GWh
| Year | Nuclear |
|---|---|
| 1990 | 4.62 TWh |
| 1991 | 4.95 TWh |
| 1992 | 3.97 TWh |
| 1993 | 3.96 TWh |
| 1994 | 4.61 TWh |
| 1995 | 4.78 TWh |
| 1996 | 4.65 TWh |
| 1997 | 5.02 TWh |
| 1998 | 5.04 TWh |
| 1999 | 4.70 TWh |
| 2000 | 4.76 TWh |
| 2001 | 5.26 TWh |
| 2002 | 5.53 TWh |
| 2003 | 5.21 TWh |
| 2004 | 5.46 TWh |
| 2005 | 5.88 TWh |
| 2006 | 5.55 TWh |
| 2007 | 5.70 TWh |
| 2008 | 6.27 TWh |
| 2009 | 5.74 TWh |
| 2010 | 5.66 TWh |
| 2011 | 6.22 TWh |
| 2012 | 5.53 TWh |
| 2013 | 5.30 TWh |
| 2014 | 6.37 TWh |
| 2015 | 5.65 TWh |
| 2016 | 5.72 TWh |
| 2017 | 6.29 TWh |
| 2018 | 5.78 TWh |
| 2019 | 5.82 TWh |
| 2020 | 6.35 TWh |
| 2021 | 5.71 TWh |
| 2022 | 5.61 TWh |
| 2023 | 5.60 TWh |
| 2024 | 5.84 TWh |
| 2025 | 5.84 TWh |
Annual statistics through 2025, % of generation
| Year | Slovenia | World |
|---|---|---|
| 1990 | 37.1% | n/a |
| 1991 | 38.9% | n/a |
| 1992 | 32.2% | n/a |
| 1993 | 33.1% | n/a |
| 1994 | 35.8% | n/a |
| 1995 | 37.1% | n/a |
| 1996 | 35.6% | n/a |
| 1997 | 38.1% | n/a |
| 1998 | 36.7% | n/a |
| 1999 | 35.4% | n/a |
| 2000 | 35.0% | 16.6% |
| 2001 | 36.3% | 16.9% |
| 2002 | 37.9% | 16.5% |
| 2003 | 37.7% | 15.6% |
| 2004 | 35.8% | 15.6% |
| 2005 | 38.9% | 15.0% |
| 2006 | 36.7% | 14.7% |
| 2007 | 37.9% | 13.7% |
| 2008 | 38.2% | 13.4% |
| 2009 | 35.0% | 13.3% |
| 2010 | 34.8% | 12.8% |
| 2011 | 39.1% | 11.9% |
| 2012 | 35.6% | 10.8% |
| 2013 | 33.5% | 10.6% |
| 2014 | 37.1% | 10.5% |
| 2015 | 38.2% | 10.6% |
| 2016 | 35.2% | 10.4% |
| 2017 | 39.2% | 10.2% |
| 2018 | 35.9% | 10.1% |
| 2019 | 36.6% | 10.3% |
| 2020 | 37.6% | 9.9% |
| 2021 | 36.6% | 9.8% |
| 2022 | 42.0% | 9.1% |
| 2023 | 36.0% | 9.1% |
| 2024 | 35.0% | 9.0% |
| 2025 | 39.4% | 8.9% |
| Year | Generation | Share | World share | Capacity |
|---|---|---|---|---|
| 2025 | 5.84 TWh | 39.4% | 8.9% | 700 MW |
| 2024 | 5.84 TWh | 35.0% | 9.0% | 700 MW |
| 2023 | 5.60 TWh | 36.0% | 9.1% | 690 MW |
| 2022 | 5.61 TWh | 42.0% | 9.1% | 690 MW |
| 2021 | 5.71 TWh | 36.6% | 9.8% | 690 MW |
| 2020 | 6.35 TWh | 37.6% | 9.9% | 690 MW |
| 2019 | 5.82 TWh | 36.6% | 10.3% | 690 MW |
| 2018 | 5.78 TWh | 35.9% | 10.1% | 690 MW |
| 2017 | 6.29 TWh | 39.2% | 10.2% | 690 MW |
| 2016 | 5.72 TWh | 35.2% | 10.4% | 690 MW |
Full year by year history for Slovenia
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025. World shares are Ember's World totals; ranks compare each country's latest year, which can differ between countries.
Nuclear Generation Month by Month
Ember monthly statistics through August 2026Monthly statistics through August 2026, TWh
| Month | Nuclear |
|---|---|
| 2024-09 | 500 GWh |
| 2024-10 | 520 GWh |
| 2024-11 | 500 GWh |
| 2024-12 | 520 GWh |
| 2025-01 | 520 GWh |
| 2025-02 | 470 GWh |
| 2025-03 | 520 GWh |
| 2025-04 | 500 GWh |
| 2025-05 | 520 GWh |
| 2025-06 | 490 GWh |
| 2025-07 | 510 GWh |
| 2025-08 | 500 GWh |
| 2025-09 | 450 GWh |
| 2025-10 | 30.0 GWh |
| 2025-11 | 500 GWh |
| 2025-12 | 520 GWh |
| 2026-01 | 520 GWh |
| 2026-02 | 470 GWh |
| 2026-03 | 520 GWh |
| 2026-04 | 500 GWh |
| 2026-05 | 520 GWh |
| 2026-06 | 500 GWh |
| 2026-07 | 500 GWh |
| 2026-08 | 460 GWh |
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of August 2026. Monthly figures for Slovenia can differ slightly from the annual totals.