Slovenia: Electricity consumption on transmission network declines as solar capacity grows

Electricity consumption from Slovenia’s transmission network continued its gradual decline over the past year, reflecting a broader downward trend in demand. In the first eleven months of 2025, end users drew just over 9.8 TWh from the high-voltage network, marking a 0.9% decrease compared to the same period in 2024.

Monthly figures show a consistent pattern of reduced consumption. November followed this trend, with network withdrawals totaling about 1,035.6 GWh, nearly 2% lower than in November of the previous year. Cumulatively, from January through November 2025, total electricity taken from the transmission system reached 9,824.5 GWh, slightly below last year’s levels.

Distribution companies represented the bulk of demand, absorbing approximately 8,553.8 GWh over the eleven-month period. While this exceeded initial energy balance projections by about 1%, it still reflected a 2% decline compared to the same timeframe in 2024. Direct consumers, on the other hand, withdrew 868 GWh, surpassing the previous year’s level by close to 3%, though this remained over 8% below the original energy balance forecasts.

A notable exception to the overall downward trend was the Avče pump-storage hydropower plant, where electricity used for pumping operations rose sharply to 402.8 GWh, almost 18% higher than a year earlier and more than 19% above initial projections.

For context, total electricity drawn from Slovenia’s transmission network in 2024 was 11,024.7 GWh, slightly below 2023 levels. The recent figures suggest that the gradual decline in transmission-level demand is likely to continue in 2025.

Several factors are driving this development, including ongoing improvements in energy efficiency, weaker industrial output, and the rapid expansion of individual and community-owned solar installations, which reduce reliance on the national grid.

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