Global GridSlovenia's energy mix and electricity
🇸🇮 In 2025, Slovenia generated 14.9 TWh of electricity. The largest source was nuclear at 39%, followed by hydro (27%) and coal (15%). In total, 79% came from low-carbon sources (nuclear and renewables) and 21% from fossil fuels.
On average, each kilowatt hour produced about 183 grams of carbon dioxide (CO₂), far below the world average of 458 grams in 2025. That makes Slovenia the 41st cleanest of 158 countries that generate at least 1 TWh a year.
Electricity demand was 14.4 TWh. Slovenia exported 0.49 TWh more electricity than it imported.
Since 2000, electricity generation has grown by 9.6%, from 13.6 TWh. The low-carbon share went from 64% to 78%. The biggest rise was in solar, from 0% to 10% of generation. The biggest fall was in coal, from 34% to 15%. Carbon intensity fell from 362 to 183 grams per kWh.
Live, hour-by-hour figures for Slovenia are not connected yet. The dashboard shows its yearly figures, energy mix since 2000 and interconnector trade.
Energy mix in 2025
- Nuclear 39%
- Hydro 27%
- Coal 15%
- Solar 10%
- Gas 6.5%
- Bioenergy 1.9%
- Wind 0.1%
| Source | Share | Generated |
|---|---|---|
| Nuclear | 39% | 5.84 TWh |
| Hydro | 27% | 4.07 TWh |
| Coal | 15% | 2.19 TWh |
| Solar | 10% | 1.53 TWh |
| Gas | 6.5% | 0.97 TWh |
| Bioenergy | 1.9% | 0.28 TWh |
| Wind | 0.1% | 0.01 TWh |
Total energy mix in 2024
Electricity is only part of the energy Slovenia uses: fuel for transport, heating and industry counts too. In 2024, Slovenia used 79.2 TWh of energy in all (primary energy). The largest source was oil at 33%, followed by nuclear (18%) and hydro (17%). Fossil fuels made up 57% and low-carbon sources (nuclear and renewables) 43%.
- Oil 33%
- Nuclear 18%
- Hydro 17%
- Coal 13%
- Gas 11%
- Solar 5.7%
- Biofuels 1.2%
- Other renewables 1.1%
| Source | Share of all energy |
|---|---|
| Oil | 33% |
| Nuclear | 18% |
| Hydro | 17% |
| Coal | 13% |
| Gas | 11% |
| Solar | 5.7% |
| Biofuels | 1.2% |
| Other renewables | 1.1% |
Primary energy, with nuclear and renewable electricity counted as the fuel a power station would need to make it (the "substitution method"). Here "other renewables" is the Energy Institute's "geothermal, biomass and other" power generation, and biofuels are liquid fuels such as ethanol and biodiesel. Source: Energy Institute Statistical Review of World Energy via Our World in Data (CC BY 4.0).
Energy security score
Strong. Slovenia ranks 42nd of 158 countries and 13th of 39 in Europe. The score shows how well a country could keep electricity affordable and on if fuel supplies were disrupted.
| Measure | Score |
|---|---|
| Produces its own energy In 2024, Slovenia produced energy equal to 42% of all the energy it used (100% or more scores full marks). | 42 |
| Variety of power sources How evenly generation is spread across nine sources. The largest, nuclear, made 39%. | 83 |
| Little reliance on imported power Slovenia exported more electricity than it imported, so it scores full marks. | 100 |
| Low-carbon power Nuclear and renewables made 79% of generation. | 79 |
| Low gas and oil use Gas and oil made 6.5% of generation; the score is 100 minus that share. | 94 |
The five measures are weighted 30%, 20%, 20%, 15% and 15%. How the score works.
Oil and gas pipelines
Global Energy Monitor lists 1,277 km of oil and gas pipelines operating in Slovenia, 47 km being built and 169 km proposed (lengths measured along the mapped routes; a pipeline crossing borders counts in full for each country).
See them on the interactive map · Pipelines around the world
How it has changed
| Year | Generated | Low-carbon | Fossil | CO₂ g/kWh |
|---|---|---|---|---|
| 2000 | 13.6 TWh | 64% | 36% | 362 |
| 2005 | 15.1 TWh | 63% | 37% | 371 |
| 2010 | 16.3 TWh | 64% | 36% | 354 |
| 2015 | 14.8 TWh | 68% | 33% | 317 |
| 2020 | 16.9 TWh | 71% | 29% | 277 |
| 2024 | 16.7 TWh | 77% | 24% | 230 |
| 2025 | 14.9 TWh | 78% | 22% | 183 |
Questions about Slovenia's energy
What is Slovenia's energy mix?
In 2025, Slovenia's electricity came from nuclear 39%, hydro 27%, coal 15% and solar 10%. Counting all the energy it uses, including fuel for transport and heating, the mix in 2024 was oil 33%, nuclear 18%, hydro 17% and coal 13%.
How much of Slovenia's electricity is renewable?
40% of its electricity came from renewables in 2025 (hydro 27%, solar 10% and bioenergy 1.9%). Including nuclear power, 79% of its electricity was low-carbon.
What is Slovenia's main source of electricity?
Nuclear, which made 39% of its electricity in 2025.
How clean is Slovenia's electricity?
About 183 grams of CO₂ for each kilowatt hour in 2025, far below the world average of 458 grams. It ranks 41st cleanest of 158 countries that generate at least 1 TWh a year.
Does Slovenia import electricity?
It is a net exporter: in 2025 it exported 0.49 TWh more electricity than it imported.
How secure is Slovenia's energy supply?
Global Grid's energy security score for Slovenia is 75 out of 100 (strong), 42nd of 158 countries. It looks at how much of its own energy it produces, how varied its power sources are, its reliance on imported power and its use of low-carbon power, gas and oil.
Other countries in Europe
Sources: Ember yearly electricity data (CC BY 4.0), figures up to 2025; energy production and use by source from the Energy Institute Statistical Review via Our World in Data (CC BY 4.0), 2024; pipelines and LNG terminals from Global Energy Monitor's Global Oil Infrastructure Tracker (June 2026 release) and Global Gas Infrastructure Tracker (November 2025 release) (CC BY 4.0). Ember's latest-year figures are first estimates and may be revised. TWh: terawatt hours (one billion kWh).