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Built 2026-11-05 (5 November 2026)

Iceland vs Slovenia: Electricity Compared

Iceland generated 18.3 TWh of electricity in 2025 and Slovenia 14.9 TWh, according to Ember. Iceland's largest source was hydro (71.2%); Slovenia's was nuclear (39.3%). Each kWh generated emitted 28 gCO2/kWh in Iceland and 183 gCO2/kWh in Slovenia. These are Ember annual statistics for 2025, compiled from national sources; they are not real time.

Who is bigger and who is cleaner? Iceland is the bigger electricity producer, generating 1.2 times as much as Slovenia in 2025 (18.3 TWh against 14.9 TWh). Iceland has the cleaner electricity by carbon intensity, at 28 gCO2/kWh against 183 gCO2/kWh in Slovenia 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

  • Hydro supplied 71.2% of Iceland's electricity in 2025, against 27.5% in Slovenia.
  • Slovenia's electricity was 6.6 times as carbon intensive as Iceland's in 2025, at 183 gCO2/kWh against 28 gCO2/kWh.
  • Low carbon sources supplied 100.0% of Iceland's electricity in 2025 and 78.9% of Slovenia's.
  • Electricity demand in 2025 was 18.3 TWh in Iceland and 14.4 TWh in Slovenia.

Key Figures, 2025

Ember annual statistics
Measure Iceland Slovenia
Total generation18.3 TWh14.9 TWh
Electricity demand18.3 TWh14.4 TWh
Demand per personn/a6.80 MWh
Carbon intensity28 gCO2/kWh183 gCO2/kWh
Power sector emissions0.51 MtCO22.72 MtCO2
Low carbon share100.0%78.9%
Largest sourceHydro 71.2%Nuclear 39.3%

Generation Mix, 2025

Share of generation
Source Iceland Slovenia
Hydro 71.2% 27.5%
Nuclear 0.0% 39.3%
Other renewables 28.7% 0.0%
Coal 0.0% 14.7%
Solar 0.1% 10.1%
Gas 0.0% 6.4%
Bioenergy 0.0% 1.9%
Wind 0.0% 0.1%
Other fossil 0.0% 0.0%

Carbon Intensity, 1990 to 2025

Ember annual statistics
Carbon intensity of electricity in Iceland and Slovenia, 1990 to 2025 Carbon intensity of electricity generated in Iceland and Slovenia each year from 1990 to 2025, in gCO2/kWh. In 2025 it was 28 gCO2/kWh in Iceland and 183 gCO2/kWh in Slovenia. 0 125 250 375 500 19901995200020052010201520202025
Carbon intensity of electricity generated in Iceland and Slovenia each year from 1990 to 2025, in gCO2/kWh. In 2025 it was 28 gCO2/kWh in Iceland and 183 gCO2/kWh in Slovenia.
Annual statistics through 2025, gCO2/kWh
Carbon intensity of electricity in Iceland and Slovenia, 1990 to 2025
YearIcelandSlovenia
1990n/a376 gCO2/kWh
1991n/a325 gCO2/kWh
1992n/a406 gCO2/kWh
1993n/a419 gCO2/kWh
1994n/a384 gCO2/kWh
1995n/a382 gCO2/kWh
1996n/a367 gCO2/kWh
1997n/a387 gCO2/kWh
1998n/a384 gCO2/kWh
1999n/a362 gCO2/kWh
200026 gCO2/kWh362 gCO2/kWh
200126 gCO2/kWh366 gCO2/kWh
200227 gCO2/kWh386 gCO2/kWh
200327 gCO2/kWh394 gCO2/kWh
200426 gCO2/kWh364 gCO2/kWh
200526 gCO2/kWh371 gCO2/kWh
200627 gCO2/kWh383 gCO2/kWh
200728 gCO2/kWh389 gCO2/kWh
200827 gCO2/kWh351 gCO2/kWh
200928 gCO2/kWh341 gCO2/kWh
201027 gCO2/kWh353 gCO2/kWh
201127 gCO2/kWh360 gCO2/kWh
201228 gCO2/kWh359 gCO2/kWh
201328 gCO2/kWh336 gCO2/kWh
201428 gCO2/kWh245 gCO2/kWh
201527 gCO2/kWh317 gCO2/kWh
201628 gCO2/kWh326 gCO2/kWh
201728 gCO2/kWh319 gCO2/kWh
201828 gCO2/kWh305 gCO2/kWh
201928 gCO2/kWh299 gCO2/kWh
202028 gCO2/kWh277 gCO2/kWh
202128 gCO2/kWh269 gCO2/kWh
202228 gCO2/kWh258 gCO2/kWh
202328 gCO2/kWh224 gCO2/kWh
202428 gCO2/kWh230 gCO2/kWh
202528 gCO2/kWh183 gCO2/kWh

Demand per Person, 1990 to 2025

Ember annual statistics
Electricity demand per person in Iceland and Slovenia, 1990 to 2025 Electricity demand per person in Iceland and Slovenia each year from 1990 to 2025, in MWh. In 2025 it was n/a in Iceland and 6.80 MWh in Slovenia. 0 15 30 45 60 19901995200020052010201520202025
Electricity demand per person in Iceland and Slovenia each year from 1990 to 2025, in MWh. In 2025 it was n/a in Iceland and 6.80 MWh in Slovenia.
Annual statistics through 2025, MWh
Electricity demand per person in Iceland and Slovenia, 1990 to 2025
YearIcelandSlovenia
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 MWh6.19 MWh
200127.93 MWh6.39 MWh
200229.03 MWh6.76 MWh
200329.14 MWh7.02 MWh
200429.23 MWh7.28 MWh
200529.01 MWh7.41 MWh
200632.42 MWh7.56 MWh
200738.15 MWh7.58 MWh
200851.46 MWh7.31 MWh
200952.45 MWh6.55 MWh
201052.62 MWh6.92 MWh
201152.80 MWh7.10 MWh
201253.89 MWh7.07 MWh
201355.54 MWh7.06 MWh
201454.35 MWh7.00 MWh
201556.05 MWh7.16 MWh
201654.15 MWh7.30 MWh
201755.51 MWh7.53 MWh
201855.80 MWh7.55 MWh
201953.67 MWh7.47 MWh
202051.53 MWh7.08 MWh
202152.03 MWh7.25 MWh
202252.24 MWh7.00 MWh
202351.12 MWh6.63 MWh
202448.42 MWh6.75 MWh
2025n/a6.80 MWh

Iceland history · Slovenia 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 Slovenia: Electricity Compared. https://worldpowermonitor.com/compare/iceland-vs-slovenia/

Plain text

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

BibTeX 
@misc{wpm_compare_iceland_vs_slovenia_2025,
  title = {{Iceland vs Slovenia: Electricity Compared}},
  author = {{World Power Monitor}},
  year = {2025},
  note = {Data as of 2025. Data from Ember.},
  url = {https://worldpowermonitor.com/compare/iceland-vs-slovenia/}
}

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