TRANSMISION 2024

Availability rate of the transmission grid

Information based on provisional data as of January 2025

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The quality of the transmission grid is also evaluated based on the availability of the facilities making up the grid. Availability measures the capacity or possibility of the system to use the various elements of the transmission grid, these being the electricity line circuits, transformers, and active or reactive power control elements (reactors and capacitors).

The evolution of the availability indicator over the last five years is shown below. The grid availability index at a national level in 2024 reached a value of 98%, higher than the 97.63% achieved in 2023. The peninsular transmission grid reached a value of 97.95% in 2024, higher than the 97.62% achieved in 2023. In the Balearic Islands and Canary Islands systems, grid availability was 98.55% (97.84% in 2023) and 98.77% (98.93% in 2023), respectively. In all electricity systems, the grid availability index stands above the 97% reference value set out in Article 26.2 of Royal Decree 1955/2000.