The Thanet Wind Farm is an offshore wind farm 7 miles (11 km) off the coast of Thanet district in Kent, England. On commissioning it was the world's largest offshore wind farm. It has a nameplate capacity of 300 MW and it cost £780–900 million (US$1.2–1.4 billion). Thanet is one of fifteen Round 2 wind projects announced by the Crown Estate in January 2004 but the first to be developed. It was officially opened on 23 September 2010, when it overtook Horns Rev 2 as the biggest offshore wind farm in the world. It has since been overtaken by many others.