Denmark is currently building the world's largest wind farm, and it's expected to be finished in August of this year (2009). Crews will install 91 wind turbines in the shallow waters of the North Sea. The electric energy produced will supply over 200,000 homes with constant power. Workers are going to assemble each turbine on land, then sail it into the shallows where it will be installed. Each windmill is nearly 375 feet high, with wings that measure 147 feet.

DONG Energy, Siemens and A2SEA have installed the first turbine at the offshore wind farm Horns Rev 2 in the North Sea. When inaugurated later this year, Horns Rev 2 will be the world's biggest offshore wind farm.

The installation was carried out using the installation vessel Sea Power and was complete after 12 hours. Horns Rev 2 is scheduled for completion in late 2009, just in time to "light up" the international climate change conference, COP 15, to be held in Copenhagen in December.

"DONG Energy actively pursues the development of renewable energy, and the installation of the first turbine at Horns Rev 2 is an important milestone in these efforts," said Anders Eldrup, CEO of DONG Energy.

The 91 turbines making up the wind farm will have a total net installed capacity of 209 MW, making it possible to supply a volume of CO2 free power equivalent to the consumption of more than 200,000 households.

"The entire Danish population will benefit from the commissioning of the turbines at Horns Rev 2. The establishment of Horns Rev 2 is an important step in the Danish Government's long-term ambition for Denmark to become independent of fossil fuels," commented Danish Minister for Climate and Energy Connie Hedegaard.

Through climate partnerships, several Danish enterprises and municipalities have agreed to purchase power from the turbines, including Novozymes, Novo Nordisk and KMD and the municipalities of Albertslund, Ballerup, Fredericia and Kalundborg.

The turbines, with a rotor diameter of 93 meters (305 ft) are being supplied by Siemens. The combined output capacity will be 209 MW. Horns Rev 2 will be the first offshore wind farm to have its own accommodation platform. The wind farm eventually will cover an area of just under 35 square kilometers (13.5 sq mi),  some 30 to 40 kilometers (19 to 25 mi) off the west coast of Denmark.

The wind farm is a sister project to Horns Rev 1, which began operation in 2003.