ENERGY FROM THE WATER 2025
Hydroelectric reserves
Information based on provisional data from January, 2026
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In terms of hydroelectric reserves, by the end of 2025, reserves were above the statistical average, as it was a year with medium-high rainfall. By the end of 2025, the filling percentage of reserves stood at 52.5%, slightly higher than at the end of 2024 (52.3%).
Total hydroelectric reserves
Statistical maximum and minimum: average of the maximum and minimum values of the last 20 years.
Reserves remained above historical average levels throughout the year, staying close to the average in the first quarter and well above it in the last three months.
Installed hydroelectric capacity and hydroelectric reserves at December 31, 2025 by hydrographic zone
Extreme values of peninsular reserves
| 2025 | Historic values | |||||
|---|---|---|---|---|---|---|
| GWh | Date | % | Date | % | ||
| Maximums | Annual | 7.920 | 27/05/2025 | 88,3 | May of 1969 | 92,0 |
| Hyper-annual | 7.616 | 27/05/2025 | 79,6 | April of 1979 | 91,1 | |
| Combined | 15.537 | 27/05/2025 | 83,8 | April of 1979 | 86,6 | |
| Minimums | Annual | 4.096 | 04/11/2025 | 45,7 | 8 December of 2017 | 24,1 |
| Hyper-annual | 4.579 | 21/01/2025 | 47,8 | November of 1983 | 17,6 | |
| Combined | 9.205 | 04/11/2025 | 49,7 | 8 December of 2017 | 23,0 | |
Water energy
Generation
Water energy
Producible hydroelectric
Wind energy
Installed capacity
Sun energy
Photovoltaic installed capacity