The Enercon E-126 is an onshore wind turbine model manufactured by the German company Enercon. With a hub height of 135 m (443 ft), rotor diameter of 126 m (413 ft) and a total height of 198 m (650 ft), the turbine can generate up to 7.58 megawatts of power, making it the largest wind turbine in the world (by nameplate capacity) for several years, until it was overtook in 2014 by the Danish company Vestas with their V164-8.0 turbine. Their model number is a reference to their rotor diameter. 
The power output of the generator was changed from 6 MW to 7.5 MW after technical revisions were performed in 2009. Since 2011 the E-126 is available as a 7.6 MW nameplate capacity. The E-126 incorporates power electronics and offers grid stabilising capabilities.
The weight of the foundation of the turbine tower is about 2,500 t, the tower itself 2,800 t, the machine housing 128 t, the generator 220 t, the rotor (including the blade) 364 t. The total weight is 6,012 tonnes exactly.
In June 2012, at least 147 Enercon E-126 windturbines were operating, in construction, or nearing final approval, 35 of them completed and operating. Furthermore, during 2010-2011, onshore wind farm projects still in their early design processes were considering wind turbines of the 2-3.5 MW class, or wind turbines of the 5-8 MW class. This approach is at least applied in the Netherlands. Examples for this trend are found for instance in the preliminary research for the "Wind farm de Drentse Monden" aiming at 300-450 MW with possibly 50-60 E-126/7.5 MW turbines, "Wind farm N33" aiming at >120 MW with possibly 15-40 E-126/7.5 MW turbines, "Wind farm Krammer" aiming at >100 MW with possibly 11-21 E-126/7.5 MW turbines, "Wind farm Wieringermeer" aiming 200-400 MW with possibly 60 or more 6+ MW turbines (in that case possibly Repower 6M/6.15MW).
Belgium: Estinnes Wind Park
In September 2010, the world's first wind park consisting entirely of Enercon E-126 turbines (11 turbines in total), was completed in Estinnes, Belgium. This wind park is capable, at max capacity, to supply 55,000 residences with pure wind energy. This wind park, though, has one 6 MW unit, so this reduces the wind park's peak capacity from 83.38 MW to 81.8MW.
Sweden: Markbygden Wind Farm
The Markbygden Wind Farm is planned to have 1,101 turbines covering 500 km², to generate 4,000 MW and an annual yield up to 12 TWh, making it one of the world's largest wind farms. Under construction in northern Sweden, it will contain a mix of Enercon E-126 7.58 MW wind turbines and Enercon E-101 3.05 MW wind turbines, the exact number of each type to be determined by further studies. The pilot stage wind farm at Dragaliden was completed in 2010, generating 24 MW with 12 turbines.
Netherlands: Windpark Noordoostpolder
Meanwhile, the Netherlands government has given its final approval on 6 January 2011 for the 'Windpark Noordoostpolder, part of which consists of 38 Enercon E-126 7.58 MW wind turbines. Afterwards, an ultimate case for the highest Court of state by opponents has been closed on 8 February 2012, confirming the government decision. It’s now expected preparatory works will start before the summer of 2012.
France: Wind Farm Le Mont des 4 Faux (Le Mont des 4 Faux Parc Éolien)
In France, a pending approval for the wind farm 'Le Mont des 4 Faux', consisting of an initial number of 52 Enercon E-126 7.58 MW wind turbines but in April 2012 reduced to a new variant of 47 turbines (deleting one 5-unit row in order to meet some ornithological concerns), is considered to be confirmed as such 47 turbines wind farm in 2012. This E-126 wind farm is situated between Juniville and Machault, at the southern side of the French Ardennes, near Reims. Project developer is a company named Windvision.
- 3sat.online (28 March 2012). "Grenzenlose Windkraft? - Windkraftanlagen werden groß wie Fernsehtürme".
- "'We're not afraid of offshore, but we decided to put 150% into onshore'". Recharge. 2016 . Retrieved 23 February 2017.
- "10 big wind turbines -". Windpower Monthly. 26 July 2016. Archived from the original on 2 November 2016. Retrieved 23 February 2017.
- "10 big wind turbines -". Windpower Monthly. Archived from the original on 12 January 2014. Retrieved 23 February 2017.
- "Grid integration & Wind farm management". Archived from the original on 11 February 2013. Retrieved 23 February 2017.
- "Archived copy" (PDF). Archived from the original (PDF) on 24 July 2011. Retrieved 7 May 2011.
- Enercon E126 from official Enercon website
- Richards, Jake (23 August 2013). "World's Most Powerful Wind Turbine May Undergo High Winds Tests". Retrieved 23 February 2017.
- Summary of existing and planned E-126 wind turbines (based on public available www-info till June 2012)
- "Home - Windpark Drentse Monden Oostermoer". Windpark Drentse Monden Oostermoer.
- "Windpark n33".
- "Home - WindPark Krammer". WindPark Krammer.
- "Index of /".
- Wind farm Estinnes Status & Real-time power output turbine nr.3 Archived 18 May 2011 at the Wayback Machine.
- "Estinnes windturbinepark – 11 x Enercon E-126 - OliNo".
- Belgium inaugurates wind farm with largest wind turbines 30 November 2009
- "Panoramio - Photo of Windpark Estinnes. Enercon E-126 - 20JUL2009".
- Markbygden Wind Farm Archived 8 March 2012 at the Wayback Machine. Sweden to build world's largest windfarm, Ordons News, April 2009
- Anton Berglund. "DRAGALIDEN". Archived from the original on 18 April 2013. Retrieved 23 February 2017.
- 2011 Windpark Noordoostpolder (Dutch)
- Le projet "Le Mont des 4 Faux" (French)
- Réunion publique d’information sur le projet éolien du Mont des4 faux à Ville-sur-Retourne
- Flyer (pdf)[permanent dead link]
|Wikimedia Commons has media related to Enercon E-126.|