Slovenia energy mix & electricity
Electricity generation in Slovenia reached 14.8 TWh in 2025. The biggest single contributor is nuclear power with 39.3%; hydropower adds 27.2% and coal 14.7%.
Electricity generation by source in 2025
Share of electricity generation by source, with the change in percentage points over the last ten years.
| Source | TWh | Share | 10-yr Δ pp |
|---|---|---|---|
| Nuclear | 5.83 | 39.3% | +1.1 |
| Hydro | 4.04 | 27.2% | +1.5 |
| Coal | 2.18 | 14.7% | −14.9 |
| Solar | 1.54 | 10.4% | +8.6 |
| Gas | 0.95 | 6.4% | +3.7 |
| Bioenergy | 0.29 | 2% | +0.2 |
| Wind | 0.01 | 0.1% | 0 |
| Total | 14.84 | 100% |
Slovenia: electricity in context
Electricity generation in Slovenia reached 14.8 TWh in 2025. That puts it in the same league as Sudan. The biggest single contributor is nuclear power with 39.3%; hydropower adds 27.2% and coal 14.7%.
The renewable share stood at 39.6%, placing Slovenia 74th of 158 ranked countries. That is 6 points above the world average of 33.8%. It is also below the average for Europe (41.6%). The EU-27 average is higher, at 47.7%. Add nuclear power (39.3%) and low-carbon sources reach 78.9% of generation. The carbon intensity of electricity is 183 g CO₂e/kWh; the global average is 458 g/kWh. That makes the grid comfortably cleaner than the global average. In the cleanest-grid ranking, Slovenia is 42nd of 158.
Since 2015, the fastest-growing source has been solar power: its output rose by 1.3 TWh, lifting its share by 8.6 percentage points. Coal moved the other way, falling by 2.2 TWh. The net effect: renewables gained 10.2 percentage points of share since 2015. Total generation grew by 40 GWh over the same period. Carbon intensity dropped from 317 to 183 g/kWh, a 42% cut.
The coal phase-down is well under way: 29.6% of generation in 2015, 14.7% by 2025. In absolute terms, coal generation peaked in 2007 at 5.5 TWh and has since fallen 60%.
Solar (10.4%) and wind (0.1%) now add up to 10.4% of generation; the global figure is 17.3%. Per person, that is 727 kWh of solar electricity a year, 2.2× the global average. In solar electricity per person, Slovenia ranks 26th in the world. Solar first passed 1% of the mix in 2012.
Generation per person is 7,010 kWh a year, 1.8× the world average of 3,860 kWh. More power leaves the country than arrives: a net 530 GWh of exports, equal to 4% of domestic demand.
How the power mix has changed
Electricity generation by source since 1990. Switch to shares to see the structural shift independent of demand growth.
Renewables and carbon intensity
Slovenia against the world, Europe and EU-27 averages.
Total energy: beyond electricity
Primary energy covers transport, heating and industry too. Renewables supply 24.7% of primary energy and fossil fuels 57% (2024). Per person, that is 37,361 kWh a year (world: 21,654).
Substitution method: non-fossil electricity is converted to the primary energy a fossil plant would have needed.
Domestic extraction of coal, gas and oil, in energy terms.
Power plants in Slovenia
The 8 power plants recorded in Slovenia add up to 2.7 GW of capacity, 48% of it Coal. The largest is Sostanj (TEŠ) at 1,099 MW. The database was last updated in 2021, so newer wind and solar farms and rooftop PV are under-represented.
Largest power plants
| # | Plant | Fuel | Capacity MW | Commissioned | Owner |
|---|---|---|---|---|---|
| 1 | Sostanj (TEŠ) | Coal | 1,099 | — | — |
| 2 | Krsko (NEK) | Nuclear | 696 | — | — |
| 3 | Brestanica (TEB) | Gas | 297 | — | — |
| 4 | ČHE Avče | Hydro | 180 | — | — |
| 5 | HE Zlatoličje | Hydro | 126 | — | — |
| 6 | HE Formin | Hydro | 116 | — | — |
| 7 | Energetika Ljubljana | Coal | 112 | — | — |
| 8 | TET | Coal | 110 | — | — |
Source: WRI Global Power Plant Database v1.3 (CC BY 4.0). Explore all 8 plants on the interactive power plant map.
Solar & wind farms: Slovenia
55 utility-scale facilities tracked by Global Energy Monitor (2026): 88 MW of solar and 0 MW of wind operating, plus 653 MW under construction or planned.
How does Slovenia compare?
Slovenia next to 6 neighbouring countries, plus regional and world averages. Click a column to sort; use “Compare” for full side-by-side charts.
| Country | Renewable % | Low-carbon % | Fossil % | gCO₂/kWh | kWh / person | Generation TWh | Mix | |
|---|---|---|---|---|---|---|---|---|
| Slovenia | 39.6% | 78.9% | 21.1% | 183 | 7,010 | 14.8 | — | |
| Italy | 48.8% | 48.8% | 51.2% | 285 | 4,475 | 265 | Compare | |
| Austria | 83.6% | 83.6% | 16.4% | 117 | 8,034 | 73.2 | Compare | |
| Hungary | 35.3% | 75.3% | 24.7% | 163 | 4,178 | 40.2 | Compare | |
| Croatia | 76.3% | 76.3% | 23.7% | 159 | 3,820 | 14.7 | Compare | |
| Bosnia and Herzegovina | 43.6% | 43.6% | 56.4% | 571 | 4,599 | 14.4 | Compare | |
| Czechia | 16.8% | 59.2% | 40.8% | 401 | 7,116 | 75.5 | Compare | |
| Europe average | 41.6% | 62% | 38% | 271 | 6,203 | 4,626 | Compare | |
| European Union (EU-27) average | 47.7% | 71.1% | 28.9% | 210 | 6,230 | 2,797 | Compare | |
| World average | 33.8% | 42.6% | 57.4% | 458 | 3,860 | 31,772 | Compare |
Calculators for Slovenia
Slovenia energy: frequently asked questions
What percentage of electricity in Slovenia is renewable?
What is the main source of electricity in Slovenia?
How clean is the electricity in Slovenia?
Does Slovenia use nuclear power?
How much electricity does Slovenia use per person?
How much solar power does Slovenia produce?
Does Slovenia import electricity?
More countries in Europe
Sources & references
- Our World in Data: Energy dataset (CC BY 4.0) — compiled from the sources below
- Ember: Yearly Electricity Data — generation, shares, carbon intensity
- Energy Institute: Statistical Review of World Energy — primary energy, fossil production
- U.S. Energy Information Administration: International Energy Data — gap-filling for smaller countries
- World Resources Institute: Global Power Plant Database v1.3 (CC BY 4.0) — power plant locations and capacity
Electricity data: Ember and Energy Institute Statistical Review via Our World in Data (CC BY 4.0); latest year 2025. Power plants: WRI Global Power Plant Database (CC BY 4.0). Rankings exclude systems under 1 TWh and values older than 2020. Figures may be revised by the original publishers.