Total electricity generation

In terms of electricity generation by type of energy in the national electricity system, renewable energies increased their electricity generation by 1.3% in 2025, achieving a record high of 150,988 GWh. This increase is mainly attributable to increased solar photovoltaic electricity generation and other renewables, which grew by 12.5% and 5.6%, respectively. During 2025, the share of renewable electricity generation in the national mix was predominant for the third time in history, with a share of 55.5%, compared to 56.8% in 2024. By contrast, non-renewable energies accounted for 44.5% of the total (43.2% in 2024).

If we take into account the estimated energy generated by self-consumption installations, which are not reflected in the available data, the total renewable energy generation figure in Spain amounts to 161,629 GWh, and the national share of renewables increases by 1.1 percentage points to 56.6%.

For the third consecutive year, wind power leads the national energy mix, with a share of 21.6% and electricity generation amounting to 58,801 GWh. Nuclear remains in second place, with a 19% share. Solar photovoltaic ranks third once again, setting new records both in terms of its share of the national mix (18.4%) and electricity generation (50,188 GWh). Combined cycle remains in fourth place with 16.8%, although its electricity generation increased by 27.9%. Rounding out the top five is hydropower, which secured fifth place with a 12.4% share, reaching 33,685 GWh.

Coal closed the year with the lowest electricity generation in its history, falling by 50% compared to the previous year and recording its smallest share of the energy mix at just 0.6% of the total. This is mainly due to the conversion of the Aboño II thermal power plant (in Asturias) to a steam turbine, which took place in mid-July.

Taking into account the estimated energy produced by self-consumption installations, the national energy mix would be led by solar photovoltaic (21.3%), followed by wind power (20.6%) and nuclear (18.1%).

Evolution of renewable and non-renewable generation

In 2025, national CO2 equiv. emission-free generation increased by 0.7%, reaching a new all-time high of 202,835 GWh. Its share in the production mix reached 74.5 %, compared to 76.8% in 2024.

Evolution of electricity generation with or without CO₂ eq. emissions

The autonomous communities continue to make progress towards the goal of the ecological transition

Among the most relevant aspects of electricity generation by autonomous communities in 2025, the following should be highlighted:

• Andalucía was the autonomous community that generated the most solar photovoltaic energy in 2025, reaching 13,253 GWh, equivalent to more than a quarter of all solar photovoltaic generation in Spain. In addition, Andalusia ranked second among the regions in renewable energy generation in 2025, with 22,930 GWh produced, surpassed only by Castilla y León. Key contributors to these strong renewable results in Andalucía in 2025 include hydroelectric power, which saw an 11.8% increase in electricity generation, and solar photovoltaic, which became the leading technology in the Andalusian energy mix for the second consecutive year, with a share of 35.8% (33.9% in 2024).
• Renewable electricity generation in Aragón in 2025 accounted for 82.9% of the total, positioning the region as the third in Spain in terms of share of renewable energy. In 2025, Aragón once again was the region with the highest proportion of wind power in its generation mix, with a share of 49.5%, and it was the second-highest producer of wind energy (11,068 GWh).
• In Asturias, renewable electricity generation in 2025 accounted for 42.1% of the energy mix, compared to 43.7% last year. This is the highest value on record. Coal generation in the region fell by 51.4% this year following the conversion of the Aboño II plant to a steam turbine in July.
• Islas Baleares recorded a renewable share of 13.6% in 2025. Other renewables were the technology that increased generation the most, registering 135.1% more than in the previous year and surpassing the historical record of annual electricity generation record of 4,720 MWh.
• In the Islas Canarias, renewable energy generation in 2025 increased by 1.9% compared to 2024, reaching a historic high of 1,885 GWh and achieving a record share of 20.9% in the Islas Canarias' energy mix. These new renewable highs occurred because solar photovoltaic recorded a historic annual electricity generation peak in 2025, with 460 GWh, respectively. This allowed this technology to reach its highest share in the Islas Canarias ' energy mix, accounting for 5.1%.
• Cantabria experienced a 3.0% growth in renewable energy generation in 2025, reaching a share of 84.8%, up from 69.1% in 2024. It ranks as the second autonomous community by renewable share, surpassed only by Castilla y León.
• Castilla-La Mancha is the third region in Spain in terms of renewable energy generation, with 21,034 GWh produced in 2025 (13.9% of the national total from renewable sources). Solar photovoltaic, which increased its electricity generation by 3.7%, was for the second consecutive year the technology that contributed the most GWh to Castilla-La Mancha's generation structure, with a share of 36.7% of the total, followed by wind power, which accounted for 26.6% of the total.
• In Castilla y León, renewable electricity generation increased by 13% in 2025 to a total of 28,431 GWh, reaffirming its leadership in national renewable energy generation with 18.8% of the total. Renewable technologies accounted for 94% of the region's generation structure, the highest historical value for the region and the highest in Spain in 2025. In 2025, wind power was the leading generation technology in Castilla y León for the ninth consecutive year, with a share of 43.9%. This positioned the region as the highest producer of wind energy, contributing 22.6% of the national total.
• Cataluña continues to be the region with the highest electricity generation in Spain in 2025, totalling 38,400 GWh, which represents 14.1% of the national total. It also remained second in emissions-free generation, which accounted for 77.5% of the Catalan energy mix. Renewable energy generation accounts for 18.1% of electricity generation in Cataluña.
• In the Comunidad Valenciana, hydroelectric power generation increased by 14.6%, contributing to renewable energy generation making up 20.2% of the regional electricity generation in 2025. In 2025, 68.8% of the Comunidad Valenciana 's electricity generation was emissions-free.
• In Extremadura, renewable energies generated 3.1% more in 2025 than in the previous year, accounting for 52.4% of the region’s electricity generation. This is the highest value recorded to date. This autonomous community remains a leader in emissions-free generation, with 99.9% of its electricity generation coming from CO2-free technologies in 2025.
• In Galicia, wind power was the main source of generation, with a 40.4% share of the Galician mix, followed by hydropower, which accounted for 39.3% of the region’s electricity generation.
• La Rioja increased its renewable electricity generation by 5.8% in 2025, which made up 49.6% of the regional mix. Wind power is the renewable technology with the largest share in its generation structure, accounting for 34.9%.
• In Madrid, renewable energy generation grew by 11.1% in 2025 compared to the previous year, mainly driven by hydropower, which increased by 32.9%. Over half (50.3%) of the energy generated in the region during 2025 came from renewable sources, up from 46.4% in 2024.
• In Murcia, renewable electricity generation increased by 0.4%, accounting for 36.5% of the total in the region. In 2025, solar photovoltaic continued to be the second-largest technology in Murcia’s generation mix, contributing 30.6% of the total.
• In Navarra, electricity produced using renewable technologies accounted for 63.6% of the total in 2025. Solar photovoltaic generation in Navarre increased by 47.3%, reaching a 6.4% share of the regional mix, while wind power remained the leading source, representing 46.5% of this region’s electricity mix.
• In País Vasco, wind power was the only technology to increase its electricity generation in 2025, growing by 9.4% compared to the previous year. Renewable energies generated 16.6% of all electricity in País Vasco in 2025.

Map of generation by autonomous communities

Generation structure by type of power plant and autonomous community

Renewable and non-renewable electricity generation percentage by autonomous communities.