Domestic energy resources covered 52% of domestic energy needs; petroleum products and natural gas were entirely imported.
Total amount of domestic energy sources in Slovenia in 2015 was 3.3 million toe (=140 PJ), which is by 10% less than in 2014. The amount of hydro energy decreased the most (by 38%), since 2015 was a much dryer year than the previous one. The amounts of nuclear energy and coal also decreased (by 11% and 2%, respectively). On the other hand, the amount of renewable energy sources increased by 6%.
In 2015, Slovenia met 52% of domestic energy demand with domestic energy resources. The rest of the energy was supplied from imports; the entire quantities of petroleum products and natural gas were imported.
In the structure of supplied energy in 2015, too, petroleum products prevailed with 34%, followed by nuclear energy with 23%, renewable energy sources with 17%, coal with 16% and natural gas with 10%.