Slovenia generated 1,152 GWh of net electricity in June 2026, broadly unchanged from a year earlier and 3% higher than in May, according to the country’s statistical office.
The stable headline concealed a substantial change in the generation mix. Thermal power production fell by 40% year on year to only 45 GWh, while hydropower increased by 4% to 377 GWh.
The Krško nuclear power plant produced 495 GWh, approximately unchanged from June 2025, and remained the single largest source of Slovenian electricity. Wind and solar generation increased by 7% to a combined 234 GWh.
Nuclear, hydro, solar and wind together accounted for almost the entire reported net generation volume. The decline in thermal production therefore did not reduce overall electricity availability because stronger renewable output and stable nuclear generation filled the gap.
Slovenia imported 881 GWh during the month, 6% less than a year earlier, while exports declined by 12% to 912 GWh. On an energy basis, the country recorded a modest net export position of approximately 31 GWh.
The large gross import and export volumes demonstrate 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 according to hourly price differences and network availability.
Household consumption reached 231 GWh, down 4% from May. Commercial and other non-household consumers used 595 GWh, an increase of 5% month on month.
The divergence suggests that seasonal residential demand weakened while commercial activity remained firm. It also places greater importance on the shape of industrial and business consumption, particularly as solar generation increases during working hours.
Slovenia’s commodity data showed a mixed picture. Compared with May, natural-gas supply declined 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 indicates a continuing contraction in a fuel segment increasingly displaced by other heating technologies and improved efficiency.
The electricity figures show a system operating with limited thermal generation but substantial cross-border flexibility. Stable output at Krško provides a strong baseload anchor, while hydro and solar increasingly determine Slovenia’s variable position.
That combination supports low-carbon electricity production but also increases the value of interconnection capacity, reservoir flexibility and short-term trading. Slovenia’s energy balance is becoming less dependent on domestic fossil generation, while remaining deeply dependent on the regional network for hourly optimisation.
