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IntelStor analysed audited data from the Energy Information Administration (EIA), part of the US Department of Energy to reach its conclusions.
The analysis shows the lifetime average net capacity factor of all power producers up to the end of 2022,using data submitted to the Federal Energy Regulatory Commission and then aggregated by the EIA. The analysis does not include projects which were commissioned this year.
GE’s lead was driven by “prime placement of turbines in the best performing sites nationally”, said IntelStor. Other OEMs appeared to lag GE, but this was largely due to resource conditions at project sites, the analysts cautioned.
The average NCF for all installed turbines in the US was 34.61%, a reduction of 0.7% from the prior year overall market average. This was despite an uptick in average performance for projects starting operations in 2022 compared with 2021.
Goldwind came in second after GE with 34.57%, while Vestas was third with 33.76%. Siemens Energy, at 33.36% and Nordex Acciona, at 31.58% made up the top five.
GE has approximately 65GW of installed capacity in the US compared to Goldwind’s 569MW, according to Windpower Intelligence, the research and data division of Windpower Monthly.
Assets owned by Algonquin Power & Utilities had the best performance for all project owners with 91.66% of their turbines meeting or exceeding a P50 energy yield. A P50 value has a 50% probability that it will be exceeded.
In second place was Xcel Energy, which retained 86.12% of its fleet at or above P50. Berkshire Hathaway Energy – including MidAmerican, Pacific Corp. and Rocky Mountain Power – were third with 74.07% of their fleet at or above P50.
Nebraska overtook South Dakota as the geographic leader last year, with a lifetime average NCF of 43.83% for its wind projects. South Dakota’s was at 42.09% while Kansas was in third place at 41.27%.
IntelStor cautioned that the capacity factor for US states relied heavily on average wind speeds at project sites.
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