In 2025, the European Union witnessed a significant surge in solar power generation, with total output exceeding 340 TWh. This increase elevated solar’s contribution to the EU energy mix to an unprecedented 12.5%, reflecting a pivotal moment for renewable energy adoption within the bloc. The rise in solar energy has played a crucial role in reducing overall emissions to approximately 45% of 1990 levels.
However, despite this remarkable growth, the momentum towards achieving broader renewable energy targets has begun to wane. Analysts attribute this slowdown primarily to stagnant electricity demand, which has restricted the expansion of renewables in final energy consumption. Total electricity use in 2025 remained largely unchanged compared to 2024 and was still about 7% below levels recorded in 2021.
The stagnation in demand has limited the market’s ability to absorb new renewable capacity, even as solar installations continue to proliferate across the EU. Notably, solar generation increased by over 60 TWh year-on-year, which is roughly equivalent to Portugal’s entire annual electricity consumption. This growth helped mitigate declines from other renewable sources, where hydropower output fell by approximately 13% and wind generation decreased by 4%.
The robust performance of solar energy has also contributed to a reduction in fossil fuel reliance. In 2025, nuclear power maintained its critical role in the energy mix, accounting for a substantial 24% share of low-carbon electricity production. Nuclear output remained stable throughout the year, ensuring a reliable baseload for the European energy system.
Wholesale day-ahead electricity prices averaged around €88/MWh, reflecting a decrease from 2023 but a slight increase from 2024 levels. Prices were notably high during the first half of the year due to diminished wind and hydropower outputs, but they eased in the latter half as solar generation ramped up and natural gas prices fell.
Despite lower average prices, market volatility persisted throughout the year. Negative electricity prices were recorded during approximately 3.3% of all hours, while price spikes exceeding €150/MWh occurred in about 9.3% of hours. These fluctuations highlight ongoing challenges within the market.
Eurelectric analysts emphasize that these developments underscore an urgent need for enhanced system flexibility, which includes advancements in storage solutions, demand response mechanisms, and smarter grid technologies. They also identify insufficient electricity demand and slow electrification as critical structural challenges that hinder more rapid progress in the EU’s transition towards sustainable energy sources.
