Monthly Balance

In May, the consumption totaled 4 225 GWh, with a peak of 7 476 MW on day 27 at 20:00. Renewable generation supplied 61% of the consumption. Hydropower accounted for 20% of the consumption, wind power for 19%, biomass for 5%, and solar for 17%. The balance of exchanges with foreign countries was import equals to 28% of consumption.

4 225 GWh
MONTHLY CONSUMPTION
61 %
% 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]

May 26 [GWh]

Accumulated [GWh]

May 25 [GWh]

Accumulated [GWh]

Month [Variation %]

Accumulated [Variation %]

TOTAL GENERATION 8 575 3 651 22 461 4 199 22 697 -13.0 -1.0
Renewable Generation 7 908 2 655 17 133 3 184 18 384 -16.6 -6.8
Hydro 1 6 537 877 7 437 1 520 8 946 -42.3 -16.9
Wind 3 527 835 6 357 739 6 146 12.9 3.4
Solar 3 394 722 2 252 705 2 152 2.4 4.7
Wave 0 0 0 0 0 - -
Biomass 2 364 222 1 087 219 1 141 1.3 -4.7
Cogeneration 144 83 408 94 492 -11.3 -17.0
Others 227 139 679 125 649 10.7 4.6
Non-Renewable Generation 1 188 494 3 494 685 2 751 -27.9 27.0
Natural Gas 1 164 474 3 400 664 2 664 -28.5 27.6
Combined-Cycle 1 048 395 3 027 574 2 166 -31.2 39.7
Cogeneration 159 79 373 89 498 -11.4 -25.1
Other Thermal 3 32 19 94 22 88 -9.8 7.5
Cogeneration 3 0 6 2 10 -69.3 -46.3
Others 29 19 89 20 77 -5.0 14.7
Generation from Storage   502 1 835 330 1 562 52.4 17.5
Pumped Storage Generation   501 1 829 329 1 561 52.1 17.1
Battery Injection   1 6 0 1 356.0  916.5 
CONSUMPTION FOR STORAGE 2 981 649 2 314 399 1 975 62.6 17.2
Pumping 2 981 647 2 307 399 1 974 62.3 16.9
Batteries 16 2 7 0 1 338.6 748.2  
IMPORT BALANCE 4 374 1 223 2 786 269 1 421 355.3 96.1
Imports (commercial schedules) 4 478 1 419 4 427 597 4 006 137.8 10.5
Exports (commercial schedules) 2 557 200 1 658 331 2 569 -39.6 -35.5
CONSUMPTION 7 476 4 225 22 934 4 068 22 143 3.9 3.6
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

May 26

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.

May 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.

Annual Consumption Supply

2026

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.

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.

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]

May 26 [GWh]

2026 [GWh]

May 25 [GWh]

2025 [GWh]

ENERGY INPUT 7 523 4 025 21 611 3 837 20 653
Power Plants 7 162 2 344 15 107 2 807 14 969
Interconnections 4 374 1 448 5 087 769 4 096
Substations 1 132 234 1 418 260 1 588
ENERGY DELIVERED 7 342 3 919 21 098 3 745 20 155
Power Plants and VHV Clients 3 311 871 3 330 609 2 967
Pumping 2 945 638 2 285 396 1 950
Interconnections 2 600 225 2 302 500 2 675
Substations 6 084 2 821 15 459 2 634 14 506
Own Consumption   1 7 1 6
LOSSES 107 514 92 498
LOSSES [%] 2.65 2.38 2.39 2.41
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.

 

May 26 [MW]

Peak [MW]

Peak Date

Hydro 8 385 7 277 2024-03-11 22:15
Wind 5 528 5 095 2025-03-19 10:15
Solar 5 003 3 394 2026-05-29 14:30
Wave 0 0 2008-10-01 03:15
Biomass 687 454 2022-03-04 18:30
Natural Gas 4 356 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 2026-02-28 19:30
TOTAL 24 002 12 222 2026-01-26 19:30
Pumping 3 585 3 011 2024-04-14 13:45
Consumption   10 261 2026-01-20 19:45
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