Cumulative U.S. installed onshore wind capacity exceeded 100 gigawatts (GW) on a nameplate capacity basis as of the end of September 2019, according to the U.S. Energy Information Administration’s (EIA) Preliminary Monthly Electric Generator Inventory. More than half of that amount has been installed since the beginning of 2012. The oldest wind turbines still operating in the United States came online as early as 1975.
