Investors received the news enthusiastically, driving Vestas shares up by 3.53% to Dkr466.50 ($68.76) at 1546 local time in Copenhagen, helping the local stock index to a slight gain amid generally falling prices across Europe.

"It's a very good order for Vestas," said Sydbank analyst Jacob Pedersen, who before the deal was confirmed already had estimated a healthy order intake of around 7.5GW