DEMAND 2025
Maximum Demand
Information based on provisional data as of January 2026
The highest annual value for the peninsula was recorded in winter, just like last year.
As in the previous year, the national daily peak demand for 2025 was recorded in summer, specifically on 2 July, with 860 GWh, 4.6% higher than last year's peak. However, the hourly peak demand occurred in winter, as has been the case in recent years, on 16 January between 20 and 21 hours, at 42.3 GWh, up 4.4% from the previous year. Nevertheless, this figure remains 3.1% below the peak reached in 2021 (43.6 GWh), recorded on 8 January during the extreme cold spell associated with Storm Filomena.
The instantaneous demand peak on the Peninsula was recorded on 15 January at 20:57 (40,070 MW), 4.7% higher than the previous year, but still below the historical peaks of 2007 (11.8%) and 2021 (5.1%). The latter coincided with the cold wave that swept across the peninsula in early January.
Annual evolution of peninsular instantaneous demand peaks
All-time summer high: July 19, 2010.
All-time winter high: December 17, 2007.
The daily demand peak on the Peninsula was recorded in the summer, specifically on 2 July, whereas in 2024 it occurred in winter. The annual peninsular hourly maximum occurred on 15 January between 20 and 21 hours and amounted to 39,957 MWh. This represents a 4.6% increase compared to the winter maximum in 2024 and is 3.1% higher than that recorded in 2023.
Annual evolution of peninsular hourly and daily demand peaks
Summer: June-September.
Winter: January-May / October-December.
Load curves for days of maximum hourly demand
Evolution of the coverage of maximum hourly demand
Allocation of electricity generation units based on primary fuel. The net production of non-renewable and hydroelectric UGH installations has been adjusted to account for their own consumption. In these types of electricity generation, negative generation indicates that the electricity consumed for the power plant’s uses exceeds its gross generation.
Other renewables: Includes biogas, biomass, marine hydro, and geothermal.
Pumped storage: Pure pumped storage + estimated mixed pumped storage.
Combined cycle: Includes operation in open-cycle mode.
Peninsula-Balearic Islands link: Positive value: energy input into the system; negative value: energy output from the system.
International exchange balance: Positive value: import-oriented balance; negative value: export-oriented balance. Increment values are not calculated when exchange balances have different signs.
Coverage of maximum hourly demand
Pumped storage: Pure pumped storage + estimated mixed pumped storage.
Electricity demand
Variation and components
Electricity demand
Final demand: IRE