La page wiki en agnalis est aussi intéressante, avec plein de références.« A British Wind Energy Association report gives an average generation cost of onshore wind power of around 3.2 pence (between US 5 and 6 cents) per kW·h (2005).[65] Cost per unit of energy produced was estimated in 2006 to be comparable to the cost of new generating capacity in the US for coal and natural gas : wind cost was estimated at $55.80 per MW·h, coal at $53.10/MW·h and natural gas at $52.50. »« The marginal cost of wind energy once a plant is constructed is usually less than 1 cent per kW·h.[70] In 2004, wind energy cost a fifth of what it did in the 1980s, and some expected that downward trend to continue as larger multi-megawatt turbines were mass-produced.[71]However, capital costs have increased. For example, in the United States, installed cost increased in 2009 to $2,120 per kilowatt of nameplate capacity, compared with $1,950 in 2008, a 9% increase. [72] Not as many facilities can produce large modern turbines and their towers and foundations, so constraints develop in the supply of turbines resulting in higher costs. »Et tout cela, avec des coûts environnementaux quasi nuls comparé aux autres modes de production électrique.