Monthly Balance

In December, the consumption totaled 4 981 GWh, with a peak of 9 398 MW on day 3 at 19:45. Renewable generation supplied 73% of the consumption. Hydropower accounted for 36% of the consumption, wind power for 27%, biomass for 5%, and solar for 5%. The balance of exchanges with foreign countries was import equals to 15% of consumption.

4 981 GWh
MONTHLY CONSUMPTION
73 %
% RENEWABLE

Energy Balance

Consumption concerning the power stations’ net generation, on the selected month, on the same month of the previous year, annual cumulative value, corresponding cumulative value from the previous year, and respective variations. Production breakdown according to primary source – coal, natural gas, water, wind, sun, biomass and others – is also shown. In addition to the monthly energy values, the peak value (maximum instantaneous value) observed in the selected month, for each of the primary sources, is also presented.

 

Peak [MW]

Dec 25 [GWh]

Accumulated [GWh]

Dec 24 [GWh]

Accumulated [GWh]

Month [Variation %]

Accumulated [Variation %]

TOTAL GENERATION 11 746 4 588 48 879 3 569 45 686 28.5 7.0
Renewable Generation 10 283 3 685 36 917 2 491 36 754 47.9 0.4
Hydro 1 7 114 1 806 14 505 655 14 540 175.8 -0.2
Wind 4 793 1 353 13 473 1 261 14 143 7.3 -4.7
Solar 2 534 274 6 132 317 4 908 -13.7 24.9
Wave 0 0 0 0 0 - -
Biomass 2 377 252 2 807 258 3 162 -2.2 -11.2
Cogeneration 161 105 1 188 96 1 340 9.5 -11.3
Others 224 147 1 619 162 1 822 -9.2 -11.2
Non-Renewable Generation 1 938 631 7 874 755 5 108 -16.4 54.1
Natural Gas 1 907 610 7 644 732 4 862 -16.7 57.2
Combined-Cycle 1 750 505 6 522 611 3 325 -17.4 96.2
Cogeneration 213 105 1 122 121 1 537 -13.1 -27.0
Other Thermal 3 34 21 230 23 247 -8.5 -6.8
Cogeneration 5 3 23 3 32 -4.7 -26.7
Others 30 18 207 20 215 -9.1 -3.9
Generation from Storage   272 4 088 324 3 824 -16.0 6.9
Pumped Storage Generation   271 4 081 324 3 824 -16.2 6.7
Battery Injection   1 7 0 0
CONSUMPTION FOR STORAGE 2 779 342 5 125 407 4 744 -16.1 8.0
Pumping 2 779 341 5 117 407 4 744 -16.3 7.9
Batteries 17 1 9 0 0 > >  
IMPORT BALANCE 4 581 736 9 291 1 498 10 465 -50.9 -11.2
Imports (commercial schedules) 4 414 980 13 349 1 686 14 949 -41.8 -10.7
Exports (commercial schedules) 2 789 245 4 065 190 4 509 29.2 -9.8
CONSUMPTION 9 398 4 981 53 045 4 659 51 407 6.9 3.2
1 Generation from natural inflow;
2 Includes: Forest biomass, biogas and the biodegradable fraction of municipal solid waste;
3 Includes: Fuel-oil, gas, the non-biodegradable fraction of municipal solid waste and other waste

Consumption Supply

Dec 25

Production breakdown according to primary source – coal, natural gas, water, wind, sun, biomass and others. These are available individually by selecting “Detailed” or grouped into renewables (water, wind, solar and biomass) and non-renewables (coal, natural gas and others) by selecting “Aggregated”. "Biomass" includes renewable energy cogeneration, forest biomass, biogas and the biodegradable fraction of municipal solid waste. In the "Other Thermal" category are included fuel-oil, the non-biodegradable fraction of municipal solid waste and other waste. If the import balance is positive, its contribution to the consumption of electricity in mainland Portugal is also shown.
The values presented are monthly, for the selected month and for the corresponding month of the previous year.

Dec 24

Production breakdown according to primary source – coal, natural gas, water, wind, sun, biomass and others. These are available individually by selecting “Detailed” or grouped into renewables (water, wind, solar and biomass) and non-renewables (coal, natural gas and others) by selecting “Aggregated”. "Biomass" includes renewable energy cogeneration, forest biomass, biogas and the biodegradable fraction of municipal solid waste. In the "Other Thermal" category are included fuel-oil, the non-biodegradable fraction of municipal solid waste and other waste. If the import balance is positive, its contribution to the consumption of electricity in mainland Portugal is also shown.
The values presented are monthly, for the selected month and for the corresponding month of the previous year.

Annual Consumption Supply

2025

Production breakdown according to primary source – coal, natural gas, water, wind, sun, biomass and others. These are available individually by selecting “Detailed” or grouped into renewables (water, wind, solar and biomass) and non-renewables (coal, natural gas and others) by selecting “Aggregated”. "Biomass" includes renewable cogeneration, forest biomass, biogas and the biodegradable fraction of municipal solid waste. In the "Other Thermal" category are included fuel-oil, the non-biodegradable fraction of municipal solid waste and other waste. If the import balance is positive, its contribution to the consumption of electricity in mainland Portugal is also shown.
The numbers shown are the cumulative values from the beginning of the year to the end of the selected month and the cumulative values for the same period of the previous year.

2024

Production breakdown according to primary source – coal, natural gas, water, wind, sun, biomass and others. These are available individually by selecting “Detailed” or grouped into renewables (water, wind, solar and biomass) and non-renewables (coal, natural gas and others) by selecting “Aggregated”. "Biomass" includes renewable cogeneration, forest biomass, biogas and the biodegradable fraction of municipal solid waste. In the "Other Thermal" category are included fuel-oil, the non-biodegradable fraction of municipal solid waste and other waste. If the import balance is positive, its contribution to the consumption of electricity in mainland Portugal is also shown.
The numbers shown are the cumulative values from the beginning of the year to the end of the selected month and the cumulative values for the same period of the previous year.

Transmission Network Balance

Physical balance of the National Electricity Transmission Network. The various parcels that constitute the energy input into the network and the energy output from the network are shown for the selected month. The inputs into the network are divided into Power Plants, Interconnections and RNT Substations, which, in this last case, is energy generated at the Distribution network level and injected in the Transmission Network when generation is greater then local consumption. The outputs from the network are divided into Power Plants and VHV Clients, that are clients connected directly to the Transmission Network, Interconnections, RNT Substations, that are the deliveries to the distribution networks, and Own Consumptions on facilities of the network itself.
The difference between inputs and outputs are the losses in the National Transmission Network.

 

Peak [MW]

Dec 25 [GWh]

2025 [GWh]

Dec 24 [GWh]

2024 [GWh]

ENERGY INPUT 9 089 4 276 48 091 4 055 46 105
Power Plants 8 532 2 995 31 915 2 247 28 430
Interconnections 4 581 997 13 080 1 602 14 357
Substations 1 201 283 3 095 206 3 318
ENERGY DELIVERED 8 876 4 171 46 949 3 971 45 003
Power Plants and VHV Clients 2 971 495 7 422 567 7 004
Pumping 2 743 339 5 060 400 4 684
Interconnections 3 100 262 3 789 104 3 891
Substations 7 417 3 412 35 722 3 298 34 093
Own Consumption   1 15 1 15
LOSSES 105 1 142 84 1 102
LOSSES [%] 2.46 2.37 2.07 2.39
Includes generators/clients HV connected to the transmission network through private lines.

Installed Capacity

Power connected to the Public Network, or power installed on thermal generators under the directive 399/2002. The additional capacity is included in the wind power producers pursuant to Decree-Law 94/2014. The historical peak values (maximum instantaneous values) are also shown for each of the primary sources.

 

Dec 25 [MW]

Peak [MW]

Peak Date

Hydro 8 385 7 277 2024-03-11 22:15
Wind 5 444 5 093 2025-03-19 10:15
Solar 4 827 3 308 2025-07-22 12:45
Wave 0 0 2008-10-01 03:15
Biomass 692 454 2022-03-04 18:30
Natural Gas 4 396 4 387 2021-01-05 21:45
Coal 1 796 2007-12-31 08:30
Other Thermal 25 2 193 2001-12-18 17:30
Batteries 19 18 2025-09-20 19:30
TOTAL 23 788 12 149 2023-12-05 19:15
Pumping 3 585 3 011 2024-04-14 13:45
Consumption   9 883 2021-01-12 19:30
Power connected to the public network or power installed on Thermal Generators
under the directive 399/2002. The wind power figure includes the additional power pursuant to Decree-Law No. 94/2014