Horns Rev 1, the first phase, was the first large-scale offshore wind farm in the world, with a capacity of 160 MW.

[3][6] Horns Rev 1, built by Danish energy company Elsam (later DONG, now Ørsted) was the first large-scale offshore wind farm in the world.

[7][8] It was the first offshore wind farm in the North Sea, the first to use the monopile foundation type and the first to have its transformer on an adjacent platform rather than onshore.

They were installed by the Danish offshore wind farm services provider A2SEA in 2002, the last turbine coming into operation on 11 December 2002.

[12][13] The main method of transport to the first wind park is an adapted Eurocopter EC-135 helicopter,[14] used to hoist workers to and from a small platform on each turbine.

It is connected by walkway to the transformer platform,[22] and is 750 square metres (8,100 sq ft) large with 3 decks and weighs 422 tons.

On-site accommodation is cheaper and more efficient than transporting service personnel by boat 2 hours from Esbjerg harbour 60 kilometres (37 mi) away.

[25] In April 2012, most of the Danish Folketing (parliament) agreed to send out tenders in 2013 for a 400 MW wind farm at Horns Rev called Horns Rev 3, and a 600 MW at Kriegers Flak in the Baltic Sea, both likely receiving 90 øre/kWh for the first 50,000 hours.

[27][28] The Danish Energy Agency expects construction candidates for Horns Rev 3 to have experience with installing and operating a large offshore wind farm.