Domestic electricity demand rose by 3.1% in September compared to the same month last year, after adjusting for the effects of temperature and working patterns. This represents an estimated gross demand of 19,831 GWh, 1.2% higher than in September 2023. 

In the first nine months of 2024, Spain recorded an aggregate demand of 185,599 GWh, 0.9% more than in the same period of 2023. After adjusting for the effects of working patterns and temperatures, demand was 1.5% higher compared to the same period of the previous year. 

This September, renewables produced 11,513 GWh, a 33% increase compared to the same month in 2023, and reached a share of 53% of the total, while 77% of the electricity was produced without emitting CO₂ equivalent. 

The leading source of production for the month was nuclear energy, which constituted 22.9% of the total, followed by wind power, which increased its generation by 27.6% compared to September 2023, reaching a share of 21.1%. Solar photovoltaic energy, which experienced a growth of 25.6%, was the third largest source for the month, contributing 19.5% to the mix.

Demand in the Peninsula increased by 3.3%

Peninsular demand was 3.2% higher than in September 2023, after factoring in the effects of working patterns and temperatures. In gross terms, demand this month was 18,486 GWh, 1.3% higher than in the same month last year.

From January to September this year, aggregate demand in the Peninsula was 174,055 GWh, 0.9% higher than that recorded in 2023. After adjusting for the effects of working patterns and temperatures, demand was 1.5% compared to the same period in the previous year. 

Peninsular renewables as a whole generated 32.9% more this September than in September 2023, reaching 11,265 GWh, which accounted for 54.9% of the total national production structure. Emission-free technologies accounted for 80.3% of the total. 

The peninsular generation structure in September was also led by nuclear energy, which was responsible for 24.2% of the total, followed by wind power with 21.6% and solar photovoltaic energy with 20.2%. 

The electricity system in the Balearic and Canary Islands

In the Balearic Islands, electricity demand in September was 0.1% higher than in the same month in 2023, after considering the effects of working hours and temperatures. Gross demand is estimated at 562,009 MWh, 0.8% less than in September last year. From January to September 2024, gross demand in the Balearic Islands is estimated at 4,696,360 MWh, 0.4% less than in the same period of 2023.

In terms of generation, combined cycle, which accounted for 65.3% of the energy produced in the Balearic Islands, was the leading source this month. Meanwhile, renewable energy generated in the Balearic Islands represented 15.1% of the total. Renewable production in the Balearic Islands grew by 34.6% in September compared to the same month last year. 

Additionally, this September, the submarine link between the Peninsula and Mallorca helped cover 28.8% of the Balearic Islands' electricity demand. 

Meanwhile, in the Canary Islands, electricity demand grew by 0.4% compared to the same month in 2023, adjusting for the effects of working patterns and temperatures. Gross demand was 745,626 MWh, representing a 0.1% increase. In the first nine months of 2024, demand in the Canary Islands was estimated at 6,548,841 MWh, 1% more than in the same period of 2023.

In terms of electricity generation in the Canary Islands, combined cycle, at 41.3% of the total, was also the leading source in August. Renewables accounted for 25.1% of production, generating 187,201 MWh, a 37% increase compared to September 2023. Wind power contributed 20.3% to the total this month, achieving a 46.7% increase compared to its production in September 2023.

Please see our Daily balance report for further information on the national, peninsular, Balearic Islands and Canary Islands electricity systems up to the end of September.