In June 2025, Spain’s electricity system continued to reinforce the role of renewable sources, which accounted for 54.1% of the power generation mix, contributing a total of 12,461 GWh, according to the latest monthly report released by the Technical Directorate of APPA Renovables. Solar photovoltaic was the leading technology, making up 26% of electricity production, followed by wind at 13.9% and hydropower at 10.4%, reflecting their crucial contribution to meeting national demand.
Market prices showed increased volatility, with the average daily price at €72.60/MWh, a 29.46% year-on-year rise. Extremes were notable, with a low of €15.99/MWh at 3 p.m. and a peak of €135.28/MWh at 9 p.m.. The report recorded 86 hours of zero or negative prices, representing 13.99% of the total hours in 2025, in addition to 127 hours priced between €0 and €30/MWh, highlighting the impact of high solar output during low demand periods.
Electricity demand grew by 10.5% year-on-year, reaching 21,705 GWh, increasing pressure during peak hours while improving value capture for flexible technologies. The average cost of balancing services rose to €18.98/MWh, a 28.97% increase compared to June 2024.
In terms of infrastructure, 386 nodes have been reserved for generation and Supreme Court (TSJ) auctions, totalling an access capacity of 162,315 MW. Meanwhile, the number of nodes reserved for demand rose to 57, with the highest concentration in Andalusia, Aragon, Castilla y León and Catalonia. Grid access capacity remained steady at 135,991 MW granted, with access requests up by 2.3% to 53,119 MW.
Captured price data shows significant pressure on solar PV revenues, with a capture ratio of just 0.50, while wind and biomass technologies reached 1.06 and 1.04 respectively, illustrating stronger market value for dispatchable or less saturated profiles.
Hydrological conditions improved, with hydropower reservoirs at 78% capacity, a 7.7% increase year-on-year, bolstering the system’s resilience. On the international front, Spain recorded a net export balance of 1,002.5 GWh, largely through flows to Portugal (1,333 GWh) and Morocco (402.2 GWh), while imports from France and Andorra remained minor.
In the gas system, demand from the electricity sector surged by 118.9%, in stark contrast with a 4.7% decline in conventional demand (residential, commercial and industrial). Biomethane injection reached 38.4 GWh, covering just 0.150% of national demand, though output rose by 38.6% year-on-year.
Lastly, the cost of producing renewable hydrogen in the Iberian Peninsula stood at €151.11/MWh, exceeding the initial index value of €148.36/MWh set in December 2024, underscoring the challenges ahead for cost-competitive green hydrogen.
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