In 2025, Slovenia’s solar energy sector demonstrated continued expansion, albeit at a decelerated rate compared to previous years. According to data from ELES, the national transmission and distribution system operator, the country reached nearly 70,000 operational solar installations by year-end, culminating in an installed capacity of approximately 1,650 MW. This represents a 16% increase from the 1,422 MW recorded at the close of 2024.
Despite this growth, the pace of expansion has notably diminished. In the peak years of 2022 and 2023, annual capacity growth rates exceeded 50%. However, this figure fell to 29% in 2024 and further declined in 2025, indicating a trend that may impact future market dynamics.
The evolving landscape of solar installations reveals a significant shift towards larger-scale projects. The number of new solar plants increased by only about 7%, contrasting with the substantial rise in total capacity. This trend suggests that developers are prioritizing larger solar facilities over smaller rooftop systems typically used for household self-consumption. Nonetheless, self-consumption systems remain prevalent, with around 64,000 installations attributed to households or small producers generating electricity primarily for personal use.
Geographical analysis indicates that the highest concentration of solar installations is found within the service area of Elektro Ljubljana, which boasts over 18,000 systems. Following closely are Elektro Celje and Elektro Maribor, with nearly 17,000 and 16,000 solar plants respectively. This regional distribution underscores the localized nature of solar energy deployment in Slovenia.
