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Slovakia Electricity: Generation Mix, Demand and Emissions

Slovakia generated 29.1 TWh of electricity in 2025, according to Ember. Nuclear was the largest source at 66.4%, followed by gas (11.3%) and hydro (10.8%). Demand was 26.7 TWh and each kWh generated emitted 95 gCO2/kWh. These are annual statistics for 2025, with monthly figures through October 2026; they are compiled from national sources and are not real time.

Key Facts

  • Slovakia generated 29.1 TWh of electricity in 2025.
  • Nuclear supplied 66.4% of Slovakia's electricity in 2025.
  • Gas supplied 11.3% of Slovakia's electricity in 2025.
  • Hydro supplied 10.8% of Slovakia's electricity in 2025.
  • Low carbon sources (nuclear and renewables) supplied 85.1% of Slovakia's generation in 2025.
  • The carbon intensity of Slovakia's electricity was 95 gCO2/kWh in 2025.
  • Slovakia's carbon intensity in 2025 was 75% lower than in 1990, when it was 387 gCO2/kWh.
  • Slovakia had the 65th highest electricity demand among the 96 countries with Ember data for 2025.

Key Figures, 2025

MeasureValueAs of / source
Total generation29.1 TWh2025 · Ember
Electricity demand26.7 TWh2025 · Ember
Demand per person4.88 MWh2025 · Ember
Net imports-2.35 TWh2025 · Ember
Carbon intensity95 gCO2/kWh2025 · Ember
Power sector emissions2.77 MtCO22025 · Ember
Demand rank (countries with 2025 data)65 of 962025 · Ember

Generation Mix, 2025

SourceGenerationShare
Nuclear 19.3 TWh 66.4%
Gas 3.29 TWh 11.3%
Hydro 3.15 TWh 10.8%
Bioenergy 1.56 TWh 5.4%
Other fossil 730 GWh 2.5%
Solar 720 GWh 2.5%
Coal 320 GWh 1.1%
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Year by Year

Ember annual statistics, 1990 to 2025
Slovakia electricity generation by source, 1990 to 2025 Slovakia's electricity generation by main source from 1990 to 2025, in TWh. In 2025 the largest sources were nuclear at 19.3 TWh, gas at 3.29 TWh, hydro at 3.15 TWh, bioenergy at 1.56 TWh, other fossil at 730 GWh. 0 5 10 15 20 19901995200020052010201520202025
Slovakia's electricity generation by main source from 1990 to 2025, in TWh. In 2025 the largest sources were nuclear at 19.3 TWh, gas at 3.29 TWh, hydro at 3.15 TWh, bioenergy at 1.56 TWh, other fossil at 730 GWh.
Annual statistics through 2025, TWh
Slovakia electricity generation by source, 1990 to 2025
YearNuclearGasHydroBioenergyOther fossil
199012.0 TWh1.82 TWh1.88 TWh0 TWh2.25 TWh
199111.7 TWh2.12 TWh1.41 TWh0 TWh3.09 TWh
199211.1 TWh870 GWh1.94 TWh0 TWh2.15 TWh
199311.5 TWh1.18 TWh3.47 TWh0 TWh2.16 TWh
199412.6 TWh2.19 TWh4.36 TWh0 TWh1.46 TWh
199511.4 TWh2.38 TWh4.88 TWh0 TWh1.28 TWh
199611.3 TWh2.34 TWh4.23 TWh0 TWh1.75 TWh
199711.1 TWh2.33 TWh4.06 TWh0 TWh1.29 TWh
199811.4 TWh2.35 TWh4.27 TWh0 TWh1.86 TWh
199913.1 TWh3.05 TWh4.47 TWh0 TWh1.09 TWh
200016.5 TWh3.34 TWh4.61 TWh0 TWh760 GWh
200117.1 TWh2.70 TWh4.93 TWh150 GWh1.12 TWh
200218.0 TWh2.51 TWh5.27 TWh150 GWh1.15 TWh
200317.9 TWh2.40 TWh3.48 TWh100 GWh1.18 TWh
200417.0 TWh2.42 TWh4.10 TWh20.0 GWh1.20 TWh
200517.7 TWh2.18 TWh4.64 TWh30.0 GWh1.21 TWh
200618.0 TWh1.91 TWh4.40 TWh400 GWh1.21 TWh
200715.3 TWh1.62 TWh4.45 TWh470 GWh1.17 TWh
200816.7 TWh1.61 TWh4.04 TWh520 GWh1.15 TWh
200914.1 TWh1.97 TWh4.37 TWh540 GWh1.10 TWh
201014.6 TWh2.21 TWh5.26 TWh660 GWh1.17 TWh
201115.4 TWh3.15 TWh3.78 TWh820 GWh1.17 TWh
201215.5 TWh2.85 TWh4.10 TWh940 GWh1.08 TWh
201315.7 TWh2.39 TWh4.85 TWh910 GWh960 GWh
201415.5 TWh1.62 TWh4.21 TWh1.42 TWh900 GWh
201515.2 TWh1.60 TWh3.87 TWh1.66 TWh990 GWh
201614.8 TWh1.52 TWh4.36 TWh1.73 TWh1.08 TWh
201715.1 TWh1.67 TWh4.32 TWh1.70 TWh1.14 TWh
201814.8 TWh1.86 TWh3.59 TWh1.63 TWh1.14 TWh
201915.3 TWh3.07 TWh4.36 TWh1.69 TWh870 GWh
202015.4 TWh3.57 TWh4.52 TWh1.67 TWh790 GWh
202115.7 TWh4.37 TWh4.26 TWh1.84 TWh1.13 TWh
202215.9 TWh2.10 TWh3.68 TWh1.49 TWh1.08 TWh
202318.3 TWh2.28 TWh4.69 TWh1.41 TWh990 GWh
202418.2 TWh2.88 TWh4.83 TWh1.58 TWh790 GWh
202519.3 TWh3.29 TWh3.15 TWh1.56 TWh730 GWh
YearGenerationDemandCarbon intensity
2025 29.1 TWh 26.7 TWh 95 gCO2/kWh
2024 29.5 TWh 26.6 TWh 97 gCO2/kWh
2023 29.5 TWh 26.1 TWh 115 gCO2/kWh
2022 26.5 TWh 28.0 TWh 142 gCO2/kWh
2021 29.7 TWh 30.5 TWh 167 gCO2/kWh
2020 28.5 TWh 28.8 TWh 159 gCO2/kWh
2019 28.2 TWh 29.9 TWh 171 gCO2/kWh
2018 26.7 TWh 30.3 TWh 191 gCO2/kWh
2017 27.4 TWh 30.5 TWh 184 gCO2/kWh
2016 26.8 TWh 29.5 TWh 177 gCO2/kWh

Full year by year history for Slovakia, 1990 to 2025

Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025.

Month by Month

Ember monthly statistics through October 2026
Slovakia monthly electricity demand and generation, November 2024 to October 2026 Slovakia's electricity demand in October 2026 was 2.17 TWh, and generation from the sources Ember reports was 1.97 TWh. Carbon intensity that month was 125 gCO2/kWh. 0 1 2 2 3 2024-112025-052025-112026-05
Slovakia's electricity demand in October 2026 was 2.17 TWh, and generation from the sources Ember reports was 1.97 TWh. Carbon intensity that month was 125 gCO2/kWh.
Monthly statistics through October 2026, TWh
Slovakia monthly electricity demand and generation, November 2024 to October 2026
MonthDemandGeneration
2024-112.30 TWh2.42 TWh
2024-122.34 TWh2.57 TWh
2025-012.47 TWh2.69 TWh
2025-022.28 TWh2.42 TWh
2025-032.27 TWh2.40 TWh
2025-042.06 TWh2.10 TWh
2025-052.03 TWh2.14 TWh
2025-061.94 TWh2.23 TWh
2025-071.97 TWh2.10 TWh
2025-081.96 TWh2.08 TWh
2025-091.97 TWh2.22 TWh
2025-102.27 TWh2.58 TWh
2025-112.35 TWh2.68 TWh
2025-122.38 TWh2.74 TWh
2026-012.66 TWh2.77 TWh
2026-022.30 TWh2.60 TWh
2026-032.27 TWh2.59 TWh
2026-042.06 TWh2.19 TWh
2026-052.03 TWh2.15 TWh
2026-062.05 TWh2.20 TWh
2026-072.04 TWh2.21 TWh
2026-082.08 TWh2.08 TWh
2026-091.97 TWh2.04 TWh
2026-102.17 TWh1.97 TWh

Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of October 2026.

Seasonal Patterns in Slovakia

Ember monthly statistics, complete years only, through October 2026

Electricity demand by month

Look for the brightest columns. Averaged over 2016 to 2025, demand is highest in January and lowest in September, and the busiest month uses 23% more electricity per day than the quietest.

Slovakia's electricity demand for each month, in TWh, 2016 to 2025. Colour shows demand per day, so short months are not shaded as quiet.
Year JanFebMarAprMayJunJulAugSepOctNovDec
2025 2.47 2.28 2.27 2.06 2.03 1.94 1.97 1.96 1.97 2.27 2.35 2.38
2024 2.49 2.19 2.21 2.05 1.98 1.95 2.04 2.08 1.97 2.14 2.30 2.34
2023 2.34 2.24 2.29 2.06 2.04 1.93 1.98 1.98 1.89 2.16 2.26 2.38
2022 2.73 2.39 2.56 2.34 2.28 2.18 2.12 2.09 1.89 2.11 2.21 2.31
2021 2.68 2.45 2.64 2.40 2.38 2.33 2.40 2.35 2.28 2.51 2.55 2.69
2020 2.77 2.50 2.50 2.05 2.09 2.10 2.18 2.21 2.19 2.43 2.53 2.61
2019 2.83 2.46 2.59 2.32 2.41 2.26 2.30 2.32 2.27 2.44 2.47 2.59
2018 2.77 2.58 2.78 2.39 2.46 2.40 2.40 2.45 2.33 2.53 2.51 2.66
2017 3.30 2.85 2.83 2.74 2.66 2.55 2.64 2.69 2.43 2.63 2.63 2.71
2016 3.10 2.72 2.77 2.57 2.59 2.38 2.47 2.33 2.45 2.66 2.69 2.94
  • Lower demand per day
  • Higher demand per day
  • No data
  • Each cell shows the month's total demand in TWh, and colour compares demand per day so short months are not shaded as quiet. Lowest cell 1.89 TWh, highest 3.30 TWh. Colours are relative to Slovakia alone.

Low carbon share of generation by month

Look for the brightest columns. Averaged over 2016 to 2025, the low carbon share is highest in August (82%) and lowest in January (76%), a gap of 6.2 points.

Share of Slovakia's electricity generation from nuclear and renewable sources for each month, in percent, 2016 to 2025.
Year JanFebMarAprMayJunJulAugSepOctNovDec
2025 83% 83% 84% 86% 89% 91% 87% 88% 86% 86% 82% 82%
2024 85% 87% 86% 88% 90% 88% 87% 87% 87% 87% 81% 83%
2023 81% 80% 84% 85% 87% 85% 85% 87% 86% 87% 87% 86%
2022 75% 77% 83% 82% 85% 85% 86% 87% 82% 84% 81% 79%
2021 72% 74% 71% 72% 83% 76% 79% 84% 75% 75% 73% 73%
2020 74% 78% 79% 80% 80% 80% 84% 81% 75% 79% 77% 75%
2019 75% 77% 78% 79% 81% 79% 78% 81% 79% 75% 77% 77%
2018 74% 72% 73% 74% 74% 73% 74% 76% 70% 70% 76% 77%
2017 70% 73% 76% 73% 76% 73% 75% 75% 79% 71% 74% 73%
2016 73% 75% 74% 73% 73% 73% 80% 79% 78% 75% 75% 73%
  • Lower low carbon share
  • Higher low carbon share
  • No data
  • Each cell shows the low carbon share. Lowest cell 70%, highest 91%. Colours are relative to Slovakia alone.

Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of October 2026. Complete calendar years only.

Countries With a Similar Electricity Mix

Ember annual, 2025

Slovakia's closest match is France, 86.1% the same, and the match goes both ways, so they are grid twins.

  1. France 86.1% the same · grid twin France generates 8.8 points more wind than Slovakia
  2. Ukraine 76.8% the same Ukraine generates 19.8 points more coal than Slovakia
  3. Slovenia 62.0% the same Slovenia generates 27.2 points less nuclear than Slovakia
  4. Hungary 62.0% the same Hungary generates 26.3 points less nuclear than Slovakia
  5. Finland 61.0% the same Finland generates 27.4 points more wind than Slovakia

How close: the share of generation that would have to change fuel for one mix to match the other (half the sum of the fuel share differences); 100% minus that is "the same". Grids under 1 TWh are skipped. Grid twins: the 25 closest pairs and every country's nearest match

Slovakia Electricity FAQ

What is the main source of electricity in Slovakia?

Nuclear was the largest source of electricity in Slovakia in 2025, supplying 66.4% of generation, followed by gas (11.3%) and hydro (10.8%). Figures are Ember annual statistics.

How much electricity does Slovakia use?

Slovakia used 26.7 TWh of electricity in 2025, about 4.88 MWh per person.

How clean is Slovakia's electricity?

Generating a kilowatt hour of electricity in Slovakia emitted 95 gCO2/kWh in 2025, and low carbon sources supplied 85.1% of generation. That is 79% below the world average of 460 gCO2/kWh.

Does Slovakia import electricity?

No. Slovakia was a net exporter in 2025, exporting 2.35 TWh more than it imported.

When does Slovakia use the most electricity?

Averaged over 2016 to 2025, Slovakia's electricity demand is highest in January and lowest in September. The busiest month uses 23% more electricity per day than the quietest (Ember monthly data).

Cite this page
APA 7

World Power Monitor. (2026). Slovakia Electricity: Generation Mix, Demand and Emissions. https://worldpowermonitor.com/countries/slovakia/

Plain text

World Power Monitor. Slovakia Electricity: Generation Mix, Demand and Emissions. Data as of 2026-10. Data from Ember. https://worldpowermonitor.com/countries/slovakia/

BibTeX 
@misc{wpm_countries_slovakia_2026,
  title = {{Slovakia Electricity: Generation Mix, Demand and Emissions}},
  author = {{World Power Monitor}},
  year = {2026},
  note = {Data as of 2026-10. Data from Ember.},
  url = {https://worldpowermonitor.com/countries/slovakia/}
}

Permalink: https://worldpowermonitor.com/countries/slovakia/

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