Slovenia generated 1,152 GWh of net electricity in June 2026, according to the country’s statistical office. The total was broadly unchanged versus June 2025 and 3% higher than in May. The monthly figures show a shift in the generation mix despite stable overall net output.
Generation mix: thermal down, hydro and renewables up
Thermal power production fell by 40% year on year to 45 GWh. Hydropower increased by 4% to 377 GWh. Wind and solar generation rose by 7% to a combined 234 GWh.
The Krško nuclear power plant produced 495 GWh, approximately unchanged from June 2025. Nuclear, hydro, solar and wind together accounted for almost the entire reported net generation volume. The reduction in thermal output did not reduce overall electricity availability because stronger renewable output and stable nuclear generation filled the gap.
Cross-border flows and monthly net export position
Slovenia imported 881 GWh during June, which was 6% lower than a year earlier. Exports declined by 12% to 912 GWh. On an energy basis, the country recorded a modest net export position of approximately 31 GWh.
The gross import and export volumes indicate Slovenia’s role as a transit and trading market between Austria, Italy, Croatia and the wider Balkan system. Its monthly net position is small relative to total cross-border flows because electricity moves through the country in both directions based on hourly price differences and network availability.
Electricity demand by consumer segment
Household consumption reached 231 GWh, down 4% from May. Commercial and other non-household consumers used 595 GWh, up 5% month on month. The change points to weaker seasonal residential demand alongside firmer commercial activity.
The pattern also affects how demand aligns with generation timing, particularly as solar output increases during working hours. The consumption split places emphasis on the shape of industrial and business demand within the monthly balance.
Fuel supply changes alongside power balance shifts
Slovenia’s commodity data showed mixed movements compared with May. Natural-gas supply fell by 15%, liquefied petroleum gas by 8%, hard coal by 4%, and coke by 2%. Kerosene supply increased by 27%, other petroleum products by 17%, heating oil by 13%, diesel by 6%, and petrol by 4%.
Compared with June 2025, heating-oil supply fell by 63%, natural gas by 9%, and LPG by 7%. The sharp reduction in heating oil coincides with a fuel segment contracting as other heating technologies and improved efficiency take share.
System operation with reduced thermal generation
The electricity figures indicate a system with limited thermal generation but substantial cross-border flexibility. Stable output from Krško provides a baseload anchor while hydro and solar increasingly shape variable generation patterns.
This combination increases reliance on interconnection capacity, reservoir flexibility and short-term trading to balance variability. Slovenia’s energy balance is becoming less dependent on domestic fossil generation while remaining dependent on the regional network for hourly optimisation.
