The unit was not repaired, because of shortage of materials during the war.The first utility grid-connected wind turbine to operate in the UK was built by John Brown & Company in 1951 in the Orkney Islands.
The largest machines were on 24-meter (79 ft) towers with four-bladed 23-meter (75 ft) diameter rotors.
By 1908 there were 72 wind-driven electric generators operating in the United States from 5 k W to 25 k W.
Despite these diverse developments, developments in fossil fuel systems almost entirely eliminated any wind turbine systems larger than supermicro size.
In the early 1970s, however, anti-nuclear protests in Denmark spurred artisan mechanics to develop microturbines of 22 k W.
Around the time of World War I, American windmill makers were producing 100,000 farm windmills each year, mostly for water-pumping.
By the 1930s, wind generators for electricity were common on farms, mostly in the United States where distribution systems had not yet been installed.
By the 14th century, Dutch windmills were in use to drain areas of the Rhine delta.
Advanced wind turbines were described by Croatian inventor Fausto Veranzio.
In his book Machinae Novae (1595) he described vertical axis wind turbines with curved or V-shaped blades.