Three turbine companies have manufactured more than three-quarters of the installed wind turbine capacity in the U.S., according to data compiled by S&P Global Market Intelligence.
Capacity from wind turbines manufactured by these three companies totaled 81.7 GW, or 84%, of the 97.2 GW installed to date in the U.S.
General Electric Co. was the largest turbine manufacturer in the U.S. in 2018, with a total installed capacity of 39,420 MW, driven by its diversification strategy and M&A activities.
Vestas Wind Systems A/S followed GE with an installed wind capacity of 23,522 MW. Siemens AG ranked third with installed wind capacity of 18,718 MW.
Of the three manufacturers, GE's wind turbines generated the most power in the U.S. in 2017, with more than 113 TWh. This topped the combined output of Vestas, at 57.2 TWh, and Siemens, at 50.7 TWh.
GE also had the highest manufactured wind fleet capacity factor in 2017 at 36.24%. This was closely followed by Vestas and Siemens at 34.62% and 33.58%, respectively.
GE's renewables arm, GE Renewable Energy, is expected to be the company's highest-growth business in 2019, Chairman and CEO Larry Culp Jr. said May 8 at the annual shareholder meeting. The expected ramp-up in wind turbine production comes ahead of the planned phase-out of the U.S. production tax credit at the end of 2019. However, the division continues to face earnings headwinds due in part to trade tariffs between the U.S. and China. The Office of the U.S. Trade Representative raised tariffs on $200 billion worth of Chinese imports to 25% from 10%, effective May 10.
Earlier in 2019, executives for GE, Vestas and Siemens Gamesa forecast strong wind demand, with delivery volume continuing to build through at least 2020 in the U.S. But the market could cool in 2021 as fewer projects qualify for federal subsidies and if continued low natural gas prices pressure the wind industry. The U.S. Department of Energy's 2017 Wind Technologies Market Report said that with "diverse and contrasting underlying potential trends, wind additions, especially after 2020, remain uncertain."
Vestas executives said in February that emerging offshore wind markets, such as the U.S., are instrumental to the Danish turbine-maker.
Following steady growth from 2010 through 2016, Siemens saw a bump in its operating wind capacity from 11,735 MW in 2016 to 17,997 MW in 2017, according to S&P Global Market Intelligence data. The growth was driven by Siemens' merger of its wind business with Gamesa Corporación Tecnológica SA in April 2017 to create Siemens Gamesa Renewable Energy SA.