An official chart shows a sustained rise in technical curtailment since May. Experts warn that without grid reinforcements, storage and demand management, renewable projects will lose financial viability.

52.4% of our country’s electricity production in August was renewable, and 74.1% did not emit CO2 equivalent. Solar photovoltaic has covered a quarter of demand and is once again the top technology in the mix for the fourth consecutive month, with production 8.5% higher than in August 2024.

The financial markets reflect the boom in renewables in Spain: in 2025 more than 56% of electricity generation comes from these sources, with Solaria rising by 10% and drivers such as Acciona Energía and Iberdrola diversifying and modernising.

AEGE’s Energy Barometer reveals that electro-intensive consumers in Spain face significantly higher costs than their European competitors, due to exclusive system adjustment charges and lower indirect CO₂ compensations.

In the last week of August, projects by Statkraft, Naturgy, Enel, Elawan and Villar Mir were approved, while two wind farms promoted by Forestalia in Zaragoza were rejected.

So far in 2025, cleantech start-ups have raised €557 million, six times more than in 2024. However, the lack of capacity in the electricity grid and recent regulatory decisions are raising concerns about the future.

AEGE’s managing director, Pedro González, analyses the impact of the validation of the 80% discount on grid levies until July and stresses that only a wider deployment of renewable energy, decoupled from gas and CO2, will allow the recovery of competitiveness for industry.

In July, Spain lost 1.1 TWh of renewable energy due to grid restrictions. While solar PV and wind capacity continues to grow, energy markets expert and Managing Director of Our New Energy, Miguel Marroquín, stresses that storage is emerging as the key pathway to integrate surplus generation.

In July 2025, 11% of the renewable electricity generated in Spain could not be injected into the grid, compared with just 0.8% a year earlier. 93% of the restrictions came from the transmission network.