Spain's electricity demand rose 2.4% in August from a year ago after adjusting for temperatures and working patterns, while renewable energy generation increased 11%, Red Electrica said on Friday.
Red Electrica said that gross electricity demand reached 23,14 gigawatt-hours last month, up 3.7% from August 2025. For the first eight months of 2026, the grid operator said that demand rose 2.8% year-over-year to 175,86 GWh, or 1.7% when adjusted for weather and working-day effects.
Self-consumption facilities, including rooftop solar installations, are forecasted to have generated around 1,600 GWh in August.
Renewable sources produced 13,64 GWh during the month, accounting for 53.6% of Spain's electricity generation and marking an 11% increase from a year earlier.
Solar photovoltaic generation led the country's power mix for a fifth consecutive month, accounting for 29.2% of total generation after output jumped 27.5% to 7,445 GWh.
Red Electrica said that solar generation also reached a new daily record on Aug. 5, producing 281.2 GWh.
Combined-cycle gas plants were the second-largest source of electricity generation in August, with a 20.7% share, followed by nuclear power at 18.6%, wind at 13.3% and hydropower at 6.9%.
Generation from sources free of carbon dioxide equivalent emissions accounted for 72.2% of the total in August, up 8.2% in volume from a year earlier.
The grid operator said that including estimated production from self-consumption installations, renewables accounted for 55.1% of Spain's electricity mix during the month.
Red Electrica said 954 GWh of renewable electricity was integrated into the grid through battery storage and pumped hydro facilities in August, helping to make greater use of renewable generation.
Meanwhile, electricity demand in the Balearic Islands rose 15.4% in August after adjusting for temperatures and working patterns. Gross demand reached 850,67 megawatt-hours, up 16.4% from the same month last year.
Red Electrica said for the first eight months of 2026, demand in the Balearics increased 6.4% year-on-year to 4.61 million MWh.
Combined-cycle gas plants accounted for 63% of electricity generation in the islands in August, followed by diesel engines at 11.3% and solar photovoltaic generation at 10.6%.
Renewable generation in the Balearics increased 20.6% year-on-year, giving renewables a 13% share of the islands' generation mix. The undersea link between mainland Spain and Mallorca supplied 23.5% of the Balearic Islands' electricity demand during the month.
Electricity demand in the Canary Islands rose 1.9% in August after adjusting for temperatures and working patterns. Red Electrica said gross demand jumped 3.1% to 843,145 MWh.
Demand in the archipelago reached 5.99 million MWh in the first eight months of 2026, up 1.6% from the same period last year.