The El hierro Wind-Hydro power Station, a project completed by Gorona del Viento El Hierro S.A., aims to provide El Hierro Island with eletricity based on clean, renewable energy sources, namely water and wind.

A wind farm produces energy that is conducted to the island's electrical grid to meet the needs of the population. Excess energy that is not directly consumed by the population will be used to pump water between two reservoirs at different altitudes. At times without winds, the water collected in the upper reservoir is released to the hydroelectric plant to generate electricity using water turbines.

Thjis serves to transform an intermittent, variable energy source into a controlled and constant supply of electricity that guarantees electrical grid stability and maximises the benefits from renewable sources. The diesel power plant will only be used in exeptional or emergency circumstances when there is not enough wind or water to produce the necessary energy.