National electricity demand fell by 0.9% in June compared to the same month last year, after adjusting for working patterns and temperatures. In gross terms, demand reached 21,970 GWh, 0.5% higher than in the same month of 2025. In addition, based on available data, self-consumption installations have generated 1,414 GWh during this thirty-day period.
 

Note: This chart does not include self-consumption data.
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In the first half of 2026, Spain recorded a total electricity demand of 127,020 GWh, representing an increase of 1.4% compared with the same period of the previous year. However, taking working patterns and temperatures into account, this growth stands at 0.9%. 
 

Electricity generation 

Renewable technologies generated a total of 14,020 GWh this June – 12% more than in the same month last year – and accounted for 58.4% of the total. 

Solar photovoltaic led electricity generation for the third consecutive month with 29.4%, a share achieved after increasing its contribution by 17.1% to 7,071 GWh. These figures represent two new monthly records for this technology at a national level.

Furthermore, this technology achieved its highest-ever share in the electricity mix on 6 June, contributing 34.9% of the total supply to the system. 

The second technology in the June mix was nuclear, accounting for 18.5%, followed by wind at 15.75%, combined cycle at 15.65%, and hydro with 8.9% of the total. 

During the month of June, 79.8% of electricity generation was free from CO2 equivalent, representing an 11.2% increase in zero-emission GWh produced.

 

When accounting for electricity generation data from self-consumption installations, the renewable share of the Spanish mix rose to 60% in June, according to available estimates. 

To promote greater utilisation of renewable generation, a total of 1,003 GWh was integrated into the grid in June through battery storage and pumped-storage hydro, which in turn supplied 592 GWh of energy back to the grid during the month. At the end of the month, these technologies held 411 GWh of stored energy.

The electrical system in Islas Baleares and Canarias

In Islas Baleares, electricity demand in June fell by 0.3% after adjusting for working patterns and temperatures. In gross terms, monthly demand is estimated at 618,557 MWh, 1.2% lower than that recorded during the same period of 2025. In the first six months of 2026, electricity demand in Islas Baleares stood at 2,921,629 MWh, 1.9% higher than in the same period of the previous year. 

Regarding electricity generation, combined cycle, accounting for 61.2% of the energy produced in Islas Baleares, was the leading generation source on the islands this month, followed by solar photovoltaic, which increased its generated MWh by 5.6% and represents 14.7% of the mix in Islas Baleares. Thus, renewable energy grew by 5.4% compared to the same period last year, reaching a share of 18% of the total generation in the archipelago.
Notably, a new record for solar photovoltaic production was achieved on 25 June with 2,547 MWh, and a day later, the Islas Baleares electrical system broke its record for renewable generation, which contributed a total of 3,087 MWh in a single day.

During this sixth month of the year, the subsea link between the Peninsula and Mallorca helped cover nearly a quarter (24.9%) of electricity demand in Islas Baleares. 

Turning to the Canarias archipelago, electricity demand grew by 1% compared to the same month in 2025, adjusting for working patterns and temperatures. In gross terms, demand stood at 717,795 MWh, 1.6% higher than in June of the previous year. For the year to date in 2026, Canarias recorded a demand of 4,333,307 MWh, 1.1% higher than in the same period of 2025. 

Lastly, in terms of electricity generation, combined cycle was the leading source in Canarias in June, accounting for 39.9% of the total, followed by wind, which accounted for 19.7% of the total. Meanwhile, solar photovoltaic experienced a growth of 8.3% to reach 46,195 MWh, a contribution that represented 6.4% of the Canarias mix. 
Overall, in this month of June, renewable electricity generation in the archipelago reached a share of 26.5% of the total energy produced.

For more statistical information about the electrical system, visit our Data section on the website.