In 2025, Slovenia’s solar energy sector reported a continued expansion, albeit at a reduced pace compared to previous years. According to data from ELES, the national transmission and distribution system operator, the country saw nearly 70,000 solar installations operational by year-end, culminating in an installed capacity of approximately 1,650 MW. This reflects a 16% increase from the 1,422 MW recorded at the close of 2024.
However, this growth comes with notable deceleration. The annual capacity growth rate that surpassed 50% in both 2022 and 2023 has significantly diminished, dropping to 29% in 2024 and experiencing further decline in 2025. This trend indicates a potential shift in market dynamics and growth sustainability within the renewable sector.
Analysis of the new installations reveals a marked shift towards larger solar facilities. The number of solar plants increased by only about 7%, which contrasts sharply with the substantial rise in total capacity. This suggests that developers are prioritizing large-scale projects over smaller rooftop systems intended for household self-consumption. Despite this shift towards larger installations, self-consumption systems remain prevalent; around 64,000 installations are attributed to households or small producers generating electricity primarily for their own use.
Geographically, the concentration of solar installations is highest within the service area of Elektro Ljubljana, which hosts over 18,000 systems. Following closely are Elektro Celje and Elektro Maribor, with nearly 17,000 and approximately 16,000 solar plants respectively. This regional distribution underscores the varying adoption rates and strategic deployment of solar resources across Slovenia.
The evolving landscape of Slovenia’s solar sector highlights critical trends that could influence future regulatory frameworks and investment strategies in renewable energy. As larger projects emerge amidst slowing overall growth rates, stakeholders must navigate these dynamics to optimize their contributions to national energy goals.
