Iceland vs Slovenia: Electricity Compared
Iceland generated 18.5 TWh of electricity in 2025 and Slovenia 14.8 TWh, according to Ember. Iceland's largest source was hydro (70.2%); Slovenia's was nuclear (39.4%). Each kWh generated emitted 28 gCO2/kWh in Iceland and 182 gCO2/kWh in Slovenia. These are Ember annual statistics for 2025, compiled from national sources; they are not real time.
Why this comparison: similar electricity demand on the same continent.
Key Facts
- Hydro supplied 70.2% of Iceland's electricity in 2025, against 27.5% in Slovenia.
- Slovenia's electricity was 6.5 times as carbon intensive as Iceland's in 2025, at 182 gCO2/kWh against 28 gCO2/kWh.
- Low carbon sources supplied 100.0% of Iceland's electricity in 2025 and 79.0% of Slovenia's.
- Electricity demand in 2025 was 18.5 TWh in Iceland and 14.3 TWh in Slovenia.
Key Figures, 2025
Ember annual statistics| Measure | Iceland | Slovenia |
|---|---|---|
| Total generation | 18.5 TWh | 14.8 TWh |
| Electricity demand | 18.5 TWh | 14.3 TWh |
| Demand per person | n/a | 6.80 MWh |
| Carbon intensity | 28 gCO2/kWh | 182 gCO2/kWh |
| Power sector emissions | 0.52 MtCO2 | 2.70 MtCO2 |
| Low carbon share | 100.0% | 79.0% |
| Largest source | Hydro 70.2% | Nuclear 39.4% |
Generation Mix, 2025
Share of generationCarbon Intensity, 1990 to 2025
Ember annual statisticsAnnual statistics through 2025, gCO2/kWh
| Year | Iceland | Slovenia |
|---|---|---|
| 1990 | n/a | 376 gCO2/kWh |
| 1991 | n/a | 325 gCO2/kWh |
| 1992 | n/a | 406 gCO2/kWh |
| 1993 | n/a | 419 gCO2/kWh |
| 1994 | n/a | 384 gCO2/kWh |
| 1995 | n/a | 382 gCO2/kWh |
| 1996 | n/a | 367 gCO2/kWh |
| 1997 | n/a | 387 gCO2/kWh |
| 1998 | n/a | 384 gCO2/kWh |
| 1999 | n/a | 362 gCO2/kWh |
| 2000 | 26 gCO2/kWh | 362 gCO2/kWh |
| 2001 | 26 gCO2/kWh | 366 gCO2/kWh |
| 2002 | 27 gCO2/kWh | 386 gCO2/kWh |
| 2003 | 27 gCO2/kWh | 394 gCO2/kWh |
| 2004 | 26 gCO2/kWh | 364 gCO2/kWh |
| 2005 | 26 gCO2/kWh | 371 gCO2/kWh |
| 2006 | 27 gCO2/kWh | 383 gCO2/kWh |
| 2007 | 28 gCO2/kWh | 389 gCO2/kWh |
| 2008 | 27 gCO2/kWh | 351 gCO2/kWh |
| 2009 | 28 gCO2/kWh | 341 gCO2/kWh |
| 2010 | 27 gCO2/kWh | 353 gCO2/kWh |
| 2011 | 27 gCO2/kWh | 360 gCO2/kWh |
| 2012 | 28 gCO2/kWh | 359 gCO2/kWh |
| 2013 | 28 gCO2/kWh | 336 gCO2/kWh |
| 2014 | 28 gCO2/kWh | 245 gCO2/kWh |
| 2015 | 27 gCO2/kWh | 317 gCO2/kWh |
| 2016 | 28 gCO2/kWh | 326 gCO2/kWh |
| 2017 | 28 gCO2/kWh | 319 gCO2/kWh |
| 2018 | 28 gCO2/kWh | 305 gCO2/kWh |
| 2019 | 28 gCO2/kWh | 299 gCO2/kWh |
| 2020 | 28 gCO2/kWh | 277 gCO2/kWh |
| 2021 | 28 gCO2/kWh | 269 gCO2/kWh |
| 2022 | 28 gCO2/kWh | 258 gCO2/kWh |
| 2023 | 28 gCO2/kWh | 224 gCO2/kWh |
| 2024 | 28 gCO2/kWh | 230 gCO2/kWh |
| 2025 | 28 gCO2/kWh | 182 gCO2/kWh |
Demand per Person, 1990 to 2025
Ember annual statisticsAnnual statistics through 2025, MWh
| Year | Iceland | Slovenia |
|---|---|---|
| 1990 | n/a | n/a |
| 1991 | n/a | n/a |
| 1992 | n/a | n/a |
| 1993 | n/a | n/a |
| 1994 | n/a | n/a |
| 1995 | n/a | n/a |
| 1996 | n/a | n/a |
| 1997 | n/a | n/a |
| 1998 | n/a | n/a |
| 1999 | n/a | n/a |
| 2000 | 27.06 MWh | 6.19 MWh |
| 2001 | 27.93 MWh | 6.39 MWh |
| 2002 | 29.03 MWh | 6.76 MWh |
| 2003 | 29.14 MWh | 7.02 MWh |
| 2004 | 29.23 MWh | 7.28 MWh |
| 2005 | 29.01 MWh | 7.41 MWh |
| 2006 | 32.42 MWh | 7.56 MWh |
| 2007 | 38.15 MWh | 7.58 MWh |
| 2008 | 51.46 MWh | 7.31 MWh |
| 2009 | 52.45 MWh | 6.55 MWh |
| 2010 | 52.62 MWh | 6.92 MWh |
| 2011 | 52.80 MWh | 7.10 MWh |
| 2012 | 53.89 MWh | 7.07 MWh |
| 2013 | 55.54 MWh | 7.06 MWh |
| 2014 | 54.35 MWh | 7.00 MWh |
| 2015 | 56.05 MWh | 7.16 MWh |
| 2016 | 54.15 MWh | 7.30 MWh |
| 2017 | 55.51 MWh | 7.53 MWh |
| 2018 | 55.80 MWh | 7.55 MWh |
| 2019 | 53.67 MWh | 7.47 MWh |
| 2020 | 51.53 MWh | 7.08 MWh |
| 2021 | 52.03 MWh | 7.25 MWh |
| 2022 | 52.24 MWh | 7.00 MWh |
| 2023 | 51.12 MWh | 6.63 MWh |
| 2024 | 48.42 MWh | 6.75 MWh |
| 2025 | n/a | 6.80 MWh |
Iceland history · Slovenia history
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025.