Solar photovoltaics once again led Spain's electricity generation in August, consolidating a streak of five consecutive months as the top technology in the energy mix. With 7,445 GWh produced , it increased its contribution by 27.5% compared to the same month in 2015 , reaching a 29.2% share.
This behavior boosted the renewable energy sector as a whole, which generated 13,640 GWh during August, 11% more year-on-year , and accounted for 53.6% of national electricity production .
This growth also occurred amid increased consumption. Electricity demand rose 2.4% year-on-year , once adjusted for temperature and working day effects. In gross terms, it reached 23,137 GWh , 3.7% higher than in August of last year.
Photovoltaics also set a new daily production record. On August 5th, it reached 281.2 GWh , surpassing its previous record and reinforcing the growing importance of this technology during the months of highest solar irradiance.
Behind solar power came combined cycle power, with a share of 20.7% , followed by nuclear power, with 18.6%; wind power, with 13.3%; and hydroelectric power, with 6.9%.
Overall, 72.2% of the electricity produced during August was free of CO2 equivalent emissions . The amount of emission-free energy generated increased by 8.2% compared to the same period last year.
This snapshot of the system must be considered in addition to self-consumption, the production of which is not fully included in the conventional energy mix figures. Based on available data, it is estimated that these installations generated around 1600 GWh during August .
By incorporating that production, the renewable share rises to 55.1% of the Spanish electricity mix , according to available estimates.
Energy storage also played a key role in utilizing a greater portion of that production. During the month , 954 GWh were integrated into the grid using batteries and pumped hydro storage , tools that allow energy to be shifted between production times and improve the management of renewable energy availability.
The upward trend in consumption, meanwhile, extends beyond August. During the first eight months of 2026, Spain accumulated an electricity demand of 175,858 GWh, 2.8% higher than that recorded in the same period of 2025. Once adjusted for temperature and working day effects, the increase was 1.7%.
The Balearic and Canary Islands also increase their renewable energy generation
The evolution was different in the island systems, where conventional technologies still maintain a considerably larger share than on the Peninsula, although renewables also showed progress.
In the Balearic Islands , the demand adjusted for temperature and working days increased by 15.4% year-on-year , while in gross terms it reached 850,670 MWh, 16.4% more than in August 2025.
Combined cycle power plants continued to dominate electricity generation in the Balearic Islands with a 63% share, followed by diesel engines at 11.3%. Photovoltaics came in third with 10.6%, after increasing its monthly production by 18% .
Overall, renewable energy generated 20.6% more electricity than a year ago , reaching a 13% share in the islands. Meanwhile, the submarine cable link between the mainland and Mallorca covered 23.5% of the demand.
In the Canary Islands , adjusted electricity consumption increased by 1.9% year-on-year and gross demand reached 843145 MWh, 3.1% higher than in August 2025.
There, combined cycle power also remained the primary source, with 35.9% of the mix , although wind power gained ground: it produced 192.8 GWh, 29% more year-on-year , and reached a share of 22.9%.
The Canary Islands' renewable energy sector increased its production by 21.6% compared to August of last year and accounted for 28.7% of the electricity generated in the archipelago.
The August data thus again show two simultaneous trends in the Spanish system: electricity demand continues to grow, but renewable generation is growing at a faster pace . In this scenario, photovoltaics is consolidating its leading position while energy storage is gaining importance to integrate an ever-increasing amount of clean energy production.