The first turbine at Vattenfall’s offshore wind farm Horns Rev 3 has been installed in the North Sea off the west coast of Denmark.

The wind farm will increase Danish annual electricity production from wind by about 12 percent. The first of 49 turbines planned at Horns Rev 3 was installed July 19 and is part of the first new Danish offshore wind farm in five years, according to reports.

“We are pleased to have started installing the turbines at Denmark’s next offshore wind farm, Martin Zappe, Project Director at Horns Rev 3, said in a statement. “Horns Rev 3 is a significant step towards a fossil-free future for both Vattenfall and Denmark. The construction of the wind farm is a large operation that involves many ships and different jobs. We are very careful about the safety of the staff, and I’m happy that the work is progressing well.”

The turbines are produced by MHI Vestas and shipped from Port of Esbjerg on the west coast of Denmark. The installation of the turbines is expected to last until November and the farm is expected to be in full operation at the beginning of 2019.

Vattenfall is Denmark’s largest offshore wind developer. In addition to Horns Rev 3, Vattenfall is developing the offshore wind farms Vesterhav Syd & Nord in the North Sea and Kriegers Flak in the Baltic Sea.

Once completed, the Horns Rev 3 offshore wind farm will have an installed capacity of 406 MW and annual production of 1,700 GWh, enough to power 425,000 Danish homes. The turbines have a rotor diameter of 164 meters and sit on foundations weighing up to 600 metric tons each.