According to data from the Statistical Office of the Republic of Slovenia, the country’s net electricity generation in September 2025 fell by 28% compared to the same month in 2024. Total net electricity production reached 932 GWh, representing a 10% decrease from August.
Electricity generation from thermal power plants dropped sharply by 73% year-on-year, while hydropower production declined by 38%. The Krško nuclear power plant generated 9% less electricity than in the same month last year. In contrast, output from wind and solar power plants increased by 38%.
During September, Slovenia imported 875 GWh of electricity—7% more than in September 2024—while exports fell by 23% to 804 GWh. Household consumption totaled 215 GWh, down 3% compared to August, whereas consumption by commercial users rose by 6% to 588 GWh.
The overall supply of energy commodities increased during September, except for several petroleum products. Supplies of other petroleum products fell by 43%, petrol by 22%, and diesel by 3%. On the other hand, significant monthly increases were recorded in the supply of hard coal (up 88%), heating oil (77%), liquefied petroleum gas (24%), coke (19%), natural gas (13%), and kerosene (8%). Compared to September 2024, supplies of other petroleum products declined by 30%, heating oil by 16%, diesel by 10%, petrol by 9%, and coke by 5%.
In 2024, the share of energy from renewable sources (RES) in Slovenia’s gross final energy consumption stood at 24.64%, which is 0.43 percentage points lower than in 2023. In the electricity sector, however, the RES share rose by 1.19 percentage points to 43.08%, mainly due to a 28.83% increase in solar power generation. The share of RES in gross final energy consumption for transport decreased by 0.78 percentage points to 9.24%, influenced by a 4.55% drop in biofuel use and a 5.1% overall increase in fuel consumption in the transport sector.