Statistics
Page built 2026-11-05
Data as of 2025
Search
Built 2026-11-05 (5 November 2026)

Iceland vs Slovakia: Electricity Compared

Iceland generated 18.3 TWh of electricity in 2025 and Slovakia 29.1 TWh, according to Ember. Iceland's largest source was hydro (71.2%); Slovakia's was nuclear (66.4%). Each kWh generated emitted 28 gCO2/kWh in Iceland and 95 gCO2/kWh in Slovakia. These are Ember annual statistics for 2025, compiled from national sources; they are not real time.

Who is bigger and who is cleaner? Slovakia is the bigger electricity producer, generating 1.6 times as much as Iceland in 2025 (29.1 TWh against 18.3 TWh). Iceland has the cleaner electricity by carbon intensity, at 28 gCO2/kWh against 95 gCO2/kWh in Slovakia in 2025.

Why this comparison: similar electricity demand on the same continent.

Open this comparison in the interactive tool to add more countries or change the metric.

Key Facts

  • Nuclear supplied 66.4% of Slovakia's electricity in 2025, against none in Iceland.
  • Slovakia's electricity was 3.4 times as carbon intensive as Iceland's in 2025, at 95 gCO2/kWh against 28 gCO2/kWh.
  • Low carbon sources supplied 100.0% of Iceland's electricity in 2025 and 85.1% of Slovakia's.
  • Electricity demand in 2025 was 18.3 TWh in Iceland and 26.7 TWh in Slovakia.

Key Figures, 2025

Ember annual statistics
Measure Iceland Slovakia
Total generation18.3 TWh29.1 TWh
Electricity demand18.3 TWh26.7 TWh
Demand per personn/a4.88 MWh
Carbon intensity28 gCO2/kWh95 gCO2/kWh
Power sector emissions0.51 MtCO22.77 MtCO2
Low carbon share100.0%85.1%
Largest sourceHydro 71.2%Nuclear 66.4%

Generation Mix, 2025

Share of generation
Source Iceland Slovakia
Hydro 71.2% 10.8%
Nuclear 0.0% 66.4%
Other renewables 28.7% 0.0%
Gas 0.0% 11.3%
Bioenergy 0.0% 5.4%
Other fossil 0.0% 2.5%
Solar 0.1% 2.5%
Coal 0.0% 1.1%
Wind 0.0% 0.0%

Carbon Intensity, 1990 to 2025

Ember annual statistics
Carbon intensity of electricity in Iceland and Slovakia, 1990 to 2025 Carbon intensity of electricity generated in Iceland and Slovakia each year from 1990 to 2025, in gCO2/kWh. In 2025 it was 28 gCO2/kWh in Iceland and 95 gCO2/kWh in Slovakia. 0 100 200 300 400 19901995200020052010201520202025
Carbon intensity of electricity generated in Iceland and Slovakia each year from 1990 to 2025, in gCO2/kWh. In 2025 it was 28 gCO2/kWh in Iceland and 95 gCO2/kWh in Slovakia.
Annual statistics through 2025, gCO2/kWh
Carbon intensity of electricity in Iceland and Slovakia, 1990 to 2025
YearIcelandSlovakia
1990n/a387 gCO2/kWh
1991n/a371 gCO2/kWh
1992n/a392 gCO2/kWh
1993n/a325 gCO2/kWh
1994n/a273 gCO2/kWh
1995n/a322 gCO2/kWh
1996n/a323 gCO2/kWh
1997n/a332 gCO2/kWh
1998n/a322 gCO2/kWh
1999n/a306 gCO2/kWh
200026 gCO2/kWh251 gCO2/kWh
200126 gCO2/kWh251 gCO2/kWh
200227 gCO2/kWh225 gCO2/kWh
200327 gCO2/kWh257 gCO2/kWh
200426 gCO2/kWh253 gCO2/kWh
200526 gCO2/kWh239 gCO2/kWh
200627 gCO2/kWh231 gCO2/kWh
200728 gCO2/kWh235 gCO2/kWh
200827 gCO2/kWh224 gCO2/kWh
200928 gCO2/kWh221 gCO2/kWh
201027 gCO2/kWh205 gCO2/kWh
201127 gCO2/kWh214 gCO2/kWh
201228 gCO2/kWh204 gCO2/kWh
201328 gCO2/kWh181 gCO2/kWh
201428 gCO2/kWh173 gCO2/kWh
201527 gCO2/kWh178 gCO2/kWh
201628 gCO2/kWh177 gCO2/kWh
201728 gCO2/kWh184 gCO2/kWh
201828 gCO2/kWh191 gCO2/kWh
201928 gCO2/kWh171 gCO2/kWh
202028 gCO2/kWh159 gCO2/kWh
202128 gCO2/kWh167 gCO2/kWh
202228 gCO2/kWh142 gCO2/kWh
202328 gCO2/kWh115 gCO2/kWh
202428 gCO2/kWh97 gCO2/kWh
202528 gCO2/kWh95 gCO2/kWh

Demand per Person, 1990 to 2025

Ember annual statistics
Electricity demand per person in Iceland and Slovakia, 1990 to 2025 Electricity demand per person in Iceland and Slovakia each year from 1990 to 2025, in MWh. In 2025 it was n/a in Iceland and 4.88 MWh in Slovakia. 0 15 30 45 60 19901995200020052010201520202025
Electricity demand per person in Iceland and Slovakia each year from 1990 to 2025, in MWh. In 2025 it was n/a in Iceland and 4.88 MWh in Slovakia.
Annual statistics through 2025, MWh
Electricity demand per person in Iceland and Slovakia, 1990 to 2025
YearIcelandSlovakia
1990n/an/a
1991n/an/a
1992n/an/a
1993n/an/a
1994n/an/a
1995n/an/a
1996n/an/a
1997n/an/a
1998n/an/a
1999n/an/a
200027.06 MWh5.22 MWh
200127.93 MWh5.23 MWh
200229.03 MWh5.21 MWh
200329.14 MWh5.34 MWh
200429.23 MWh5.32 MWh
200529.01 MWh5.22 MWh
200632.42 MWh5.38 MWh
200738.15 MWh5.50 MWh
200851.46 MWh5.43 MWh
200952.45 MWh5.06 MWh
201052.62 MWh5.29 MWh
201152.80 MWh5.37 MWh
201253.89 MWh5.31 MWh
201355.54 MWh5.28 MWh
201454.35 MWh5.21 MWh
201556.05 MWh5.35 MWh
201654.15 MWh5.43 MWh
201755.51 MWh5.60 MWh
201855.80 MWh5.57 MWh
201953.67 MWh5.49 MWh
202051.53 MWh5.29 MWh
202152.03 MWh5.60 MWh
202252.24 MWh5.11 MWh
202351.12 MWh4.73 MWh
202448.42 MWh4.83 MWh
2025n/a4.88 MWh

Iceland history · Slovakia history

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

Cite this page
APA 7

World Power Monitor. (2025). Iceland vs Slovakia: Electricity Compared. https://worldpowermonitor.com/compare/iceland-vs-slovakia/

Plain text

World Power Monitor. Iceland vs Slovakia: Electricity Compared. Data as of 2025. Data from Ember. https://worldpowermonitor.com/compare/iceland-vs-slovakia/

BibTeX 
@misc{wpm_compare_iceland_vs_slovakia_2025,
  title = {{Iceland vs Slovakia: Electricity Compared}},
  author = {{World Power Monitor}},
  year = {2025},
  note = {Data as of 2025. Data from Ember.},
  url = {https://worldpowermonitor.com/compare/iceland-vs-slovakia/}
}

Permalink: https://worldpowermonitor.com/compare/iceland-vs-slovakia/

The Copy buttons add today's date as the access date.