Spain has bolstered its credentials as a world leader in renewable energy by exporting electricity to France for the first time. Heavy rain and strong winds during 2010 meant that renewables - principally hydro, wind and solar power - met 35% of Spanish demand.

Wind power rose by 18.5% in 2010 and now meets 16% of demand. Luis Atienza, managing director of Spain's electricity grid, predicted that "within three years wind power will overtake nuclear as an electricity source". At its peak, on November 9, wind power met 43% of demand.

Heavy rains saw hydro-electrical production rise by 59% on 2009. Solar power, meanwhile, lags behind at only 3%, although some of the big solar plants have yet to come on stream.

Oil and gas continue to generate about half of Spain's capacity, while nuclear power accounts for around 19%.

Javier Garcîa Breva, director of the solar energy programme, said that "even five years ago no one would have believed these figures were possible. No one expected renewables to grow so fast. They have unlimited potential."

Spain continues to import electricity from France but only as a staging post en route to Morocco, Portugal and Andorra. "France has not increased its capacity and so its ability to export has decreased," Atienza said. "This has fallen further due to industrial strife." During recent strikes dozens of French power stations were forced to close and Spanish production had to be imported to meet the shortfall.

This greening of the Spanish grid has not benefited the consumer, with prices likely to rise by 9% in 2011. The government sets electricity prices which have no direct correlation with production costs.