Under EU merger regulations, the EC ruled the proposal avoided breaking competition rules "because the overlaps and relationships between the activities of Areva and Gamesa are limited".
The two companies are planning to form a 50:50 joint venture to develop offshore turbines with the aim of taking 20% of the European market by 2020.
Under the deal, Gamesa will contribute its 5MW offshore platform, operations and maintenance, research and development (R&D), and supply-chain access knowledge. It values this at EUR 195 million.
Areva said it would include its 5MW turbine, offshore R&D experience, and its German manufacturing centres in Bremerhaven and Stade. This was valued at EUR 280 million. Areva also included its 8MW turbine, which was announced in November. The two companies will continue to develop an 8MW turbine together.