Renewable energies covered 61.6% of total electricity generation in Spain in May 2025, according to the latest monthly report by APPA Renovables. Total renewable generation reached 12,754 GWh, with solar photovoltaic contributing the largest share at 23.5%, followed by wind power (17.31%) and hydropower (16.7%).
This high share of renewables significantly influenced the electricity market. The average daily market price was €16.93/MWh, representing a 69.14% increase compared to May 2024. Despite this, there were 269 hours with zero or negative prices, equivalent to 14.37% of total hours so far this year, along with 285 hours priced between €0 and €30/MWh. The lowest hourly price was –€4.5/MWh at 3 p.m., and the highest was €63.9/MWh at 9 p.m..
The report also highlights that balancing service costs reached €27.27/MWh, the highest figure recorded to date following recent zero-energy events—an 82.77% increase year-on-year.
Electricity demand fell by 1.1% compared to May 2024, totalling 19,300 GWh. In contrast, natural gas demand for electricity generation rose by 68.1%, while conventional gas demand (industrial, commercial, and residential) declined by 5.1%.
The renewable hydrogen production cost index in mainland Spain was recorded at €150.92/MWh. Meanwhile, biomethane covered 0.157% of national gas demand, with 38.3 GWh injected into the grid.
Regarding access capacity, 386 grid nodes were reserved for renewable generation, totalling 160,019 MW. An additional 53 nodes were allocated to demand-related projects, across 13 autonomous communities, including self-consumption and energy storage, representing a requested capacity of 65,848 MW.
Hydropower reservoir levels closed April at 80.8% of capacity nationwide, up 7.4% year-on-year.
In terms of market capture ratios, biomass (1.07) and wind (1.09) remained high, whereas solar PV showed a lower value of 0.11, indicating the influence of low prices during peak solar hours.
