Slovakia Nuclear Power: Generation, Share and Trend
Slovakia generated 19.3 TWh of electricity from nuclear in 2025, 66.4% of its total, according to Ember. That made it the 19th 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 July 2026; they are compiled from national sources and are not real time.
Key Facts
- Slovakia generated 19.3 TWh of electricity from nuclear in 2025.
- Nuclear supplied 66.4% of Slovakia's electricity in 2025.
- Slovakia was the 19th largest nuclear power producer in 2025 among the 32 countries with Ember data, comparing each country's latest year.
- Slovakia's nuclear generation in 2025 was 25% higher than in 2020, when it was 15.4 TWh.
- Slovakia's nuclear generation in 2025 was 28% higher than in 2015, when it was 15.2 TWh.
- 2025 was Slovakia's highest year for nuclear generation in Ember's records, which start in 1990.
- Slovakia's nuclear share in 2025 was above the world share of 8.9%.
- Slovakia had 2.47 GW of nuclear generating capacity in 2025.
Key Figures, 2025
| Measure | Value | As of / source |
|---|---|---|
| Nuclear generation | 19.3 TWh | 2025 · Ember |
| Share of Slovakia's electricity | 66.4% | 2025 · Ember |
| World share of nuclear | 8.9% | 2025 · Ember |
| Rank by nuclear generation (each country's latest year) | 19 of 32 | 2025 · Ember |
| Nuclear capacity | 2.47 GW | 2025 · Ember |
Nuclear Generation Year by Year
Ember annual statistics, 1990 to 2025Annual statistics through 2025, TWh
| Year | Nuclear |
|---|---|
| 1990 | 12.0 TWh |
| 1991 | 11.7 TWh |
| 1992 | 11.1 TWh |
| 1993 | 11.5 TWh |
| 1994 | 12.6 TWh |
| 1995 | 11.4 TWh |
| 1996 | 11.3 TWh |
| 1997 | 11.1 TWh |
| 1998 | 11.4 TWh |
| 1999 | 13.1 TWh |
| 2000 | 16.5 TWh |
| 2001 | 17.1 TWh |
| 2002 | 18.0 TWh |
| 2003 | 17.9 TWh |
| 2004 | 17.0 TWh |
| 2005 | 17.7 TWh |
| 2006 | 18.0 TWh |
| 2007 | 15.3 TWh |
| 2008 | 16.7 TWh |
| 2009 | 14.1 TWh |
| 2010 | 14.6 TWh |
| 2011 | 15.4 TWh |
| 2012 | 15.5 TWh |
| 2013 | 15.7 TWh |
| 2014 | 15.5 TWh |
| 2015 | 15.2 TWh |
| 2016 | 14.8 TWh |
| 2017 | 15.1 TWh |
| 2018 | 14.8 TWh |
| 2019 | 15.3 TWh |
| 2020 | 15.4 TWh |
| 2021 | 15.7 TWh |
| 2022 | 15.9 TWh |
| 2023 | 18.3 TWh |
| 2024 | 18.2 TWh |
| 2025 | 19.3 TWh |
Annual statistics through 2025, % of generation
| Year | Slovakia | World |
|---|---|---|
| 1990 | 47.2% | n/a |
| 1991 | 48.2% | n/a |
| 1992 | 47.6% | n/a |
| 1993 | 47.8% | n/a |
| 1994 | 49.5% | n/a |
| 1995 | 43.3% | n/a |
| 1996 | 44.2% | n/a |
| 1997 | 44.2% | n/a |
| 1998 | 44.3% | n/a |
| 1999 | 46.7% | n/a |
| 2000 | 53.6% | 16.6% |
| 2001 | 53.7% | 16.9% |
| 2002 | 55.8% | 16.5% |
| 2003 | 57.7% | 15.6% |
| 2004 | 55.9% | 15.6% |
| 2005 | 56.6% | 15.0% |
| 2006 | 57.6% | 14.7% |
| 2007 | 55.0% | 13.7% |
| 2008 | 58.2% | 13.4% |
| 2009 | 54.3% | 13.3% |
| 2010 | 53.1% | 12.8% |
| 2011 | 54.5% | 11.9% |
| 2012 | 54.7% | 10.8% |
| 2013 | 55.2% | 10.6% |
| 2014 | 57.1% | 10.5% |
| 2015 | 56.9% | 10.6% |
| 2016 | 55.1% | 10.4% |
| 2017 | 55.0% | 10.2% |
| 2018 | 55.7% | 10.1% |
| 2019 | 54.2% | 10.3% |
| 2020 | 54.2% | 9.9% |
| 2021 | 53.0% | 9.8% |
| 2022 | 60.0% | 9.1% |
| 2023 | 62.1% | 9.1% |
| 2024 | 61.8% | 9.0% |
| 2025 | 66.4% | 8.9% |
| Year | Generation | Share | World share | Capacity |
|---|---|---|---|---|
| 2025 | 19.3 TWh | 66.4% | 8.9% | 2.47 GW |
| 2024 | 18.2 TWh | 61.8% | 9.0% | 2.47 GW |
| 2023 | 18.3 TWh | 62.1% | 9.1% | 2.00 GW |
| 2022 | 15.9 TWh | 60.0% | 9.1% | 2.00 GW |
| 2021 | 15.7 TWh | 53.0% | 9.8% | 2.00 GW |
| 2020 | 15.4 TWh | 54.2% | 9.9% | 1.97 GW |
| 2019 | 15.3 TWh | 54.2% | 10.3% | 1.94 GW |
| 2018 | 14.8 TWh | 55.7% | 10.1% | 1.94 GW |
| 2017 | 15.1 TWh | 55.0% | 10.2% | 1.94 GW |
| 2016 | 14.8 TWh | 55.1% | 10.4% | 1.94 GW |
Full year by year history for Slovakia
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 July 2026Monthly statistics through July 2026, TWh
| Month | Nuclear |
|---|---|
| 2024-08 | 1.44 TWh |
| 2024-09 | 1.48 TWh |
| 2024-10 | 1.66 TWh |
| 2024-11 | 1.61 TWh |
| 2024-12 | 1.76 TWh |
| 2025-01 | 1.83 TWh |
| 2025-02 | 1.65 TWh |
| 2025-03 | 1.62 TWh |
| 2025-04 | 1.39 TWh |
| 2025-05 | 1.50 TWh |
| 2025-06 | 1.61 TWh |
| 2025-07 | 1.35 TWh |
| 2025-08 | 1.39 TWh |
| 2025-09 | 1.52 TWh |
| 2025-10 | 1.81 TWh |
| 2025-11 | 1.77 TWh |
| 2025-12 | 1.83 TWh |
| 2026-01 | 1.83 TWh |
| 2026-02 | 1.66 TWh |
| 2026-03 | 1.78 TWh |
| 2026-04 | 1.49 TWh |
| 2026-05 | 1.50 TWh |
| 2026-06 | 1.55 TWh |
| 2026-07 | 1.61 TWh |
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of July 2026. Monthly figures for Slovakia can differ slightly from the annual totals.