Wind Project Performance 1994 Summary

The 10 Largest Wind Turbine Manufacturers

Wind Figure 19

The 10 largest wind turbine manufacturers represent about 90 percent of California's wind generating capacity. The five largest manufacturers alone (Kenetech, Vestas, MWT, Micon and FloWind) account for more than 71 percent of all capacity. The 10 largest manufacturers and their individual generating capacities are shown in Figure 19 (Cumulative Capacity for 10 Largest Turbine Manufacturers). A wide range of capacity factors exist among these manufacturers (Figure 20 -- Capacity Factors for 10 Largest Turbine Manufacturers). Manufacturers with the highest capacity factors are Danwin (29 percent); MWT (28 percent); Bonus (26 percent); and Kenetech, Vestas and Micon (25 percent). It should be noted that capacity factor performance for 6 of the 10 largest manufacturers increased from the previous year.

 
Wind Figure 20

Both equipment and siting variables should be considered when evaluating turbine manufacturer data. Manufacturers with older turbine bases are more adversely affected relative to their total performance. The overall quality of a particular resource area also has considerable impact on reported performance of turbines sited in that area. Higher capacity factors for some specific turbine types may result from their concentration at particularly good sites within high quality resource areas.

 
Wind Figure 21

Annual kWh per square meter results are shown for the ten largest manufacturers in Figure 21 (kWh Per square Meter Production for 10 Largest Manufacturers). Manufacturers with the highest kWh per square meter production are MWT (1016), Danwin (980), Vestas (848), Bonus (847) and Kenetech (831). Kilowatt hour (kWh) per square meter performance for 7 of the 10 largest manufacturers increased from the previous year.

 

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