He said wind power producers in Europe, the world's biggest single market, could take on the EU's goal of 20 percent of energy produced from renewable sources by the end of next decade.

EWEA expects EU's wind power capacity to rise to 300,000 MW in 2030, with offshore generation accounting for up to half of all capacity -- up from about one third expected in 2020. Zervos said the success of renewable energy depended greatly on a more competitive European electricity market which should also have reinforced power grids, better interconnections between member states and a European offshore grid for wind power stations.

Wind energy operators present at the conference also called for clear guidelines from the European Commission on how it expected countries to reach a 20 percent target set for renewable energy in total energy use by 2020.

The Commission would present the guidelines for the member states in October or November and then it would take 1-2 years to agree the strategy with the EU Council and Parliament, said Fabrizio Barbaso, the Commission's deputy director general.