Slovenia’s solar energy sector continued to expand in 2025, though at a slower pace than during the previous boom years. Data from ELES, the country’s transmission and distribution system operator, show that nearly 70,000 solar installations were operational by the end of the year, reaching a total installed capacity of about 1,650 MW. This marks a 16% increase compared to 1,422 MW at the end of 2024.
Despite continued growth, the rate of expansion has slowed considerably. During 2022 and 2023, annual capacity growth exceeded 50%, while it slowed to 29% in 2024 and fell further last year.
The data also reveal a shift in the structure of new installations. The number of solar plants grew by only about 7%, much less than the increase in total capacity, indicating that developers are increasingly focusing on larger solar facilities rather than small rooftop systems for household self-consumption. Nevertheless, self-consumption systems still dominate, with approximately 64,000 installations belonging to households or small producers generating electricity primarily for their own use.
Regional data show the highest concentration of solar installations in the service area of Elektro Ljubljana, with over 18,000 systems. The distribution areas of Elektro Celje and Elektro Maribor follow, hosting nearly 17,000 and 16,000 solar plants, respectively.
