Slovenia generated 1,152 GWh of net electricity in June 2026, according to the country’s statistical office. Output 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 production.
Generation mix: thermal down, hydro and renewables up
Thermal power production declined 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 remained the single largest source of Slovenian electricity in the month. Nuclear, hydro, solar and wind together accounted for almost the entire reported net generation volume.
The reduction in thermal output did not lower overall electricity availability because stronger renewable output and stable nuclear generation filled the gap. The generation pattern therefore relied on hydropower and variable renewables alongside Krško. This balance is reflected in the reported net generation totals for June.
Cross-border trade and domestic demand
Slovenia imported 881 GWh during the month, 6% less than a year earlier. Exports fell 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 depending on hourly price differences and network availability. This pattern is consistent with high gross flows alongside limited net balance.
Household consumption reached 231 GWh, down 4% from May. Commercial and other non-household consumers used 595 GWh, up 5% month on month. The figures point to weaker seasonal residential demand while commercial activity remained firm.
Fuel supply changes alongside power balance shifts
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 dropped by 63%, natural gas by 9%, and LPG by 7%. The sharp reduction in heating oil was accompanied by increases in other petroleum product categories versus May. These changes were reflected in the broader fuel supply picture for the month.
The electricity balance indicates limited thermal generation alongside substantial cross-border flexibility. Stable output at Krško provided a baseload anchor while hydro and solar increasingly shaped the variable position. This also coincided with commodity shifts that included lower supplies of heating oil, natural gas and LPG versus June 2025.
