| Wind Power Class | |
The wind power class is a number indicating the mean energy content of the wind resource. Wind power classes are based on the mean wind power density at 50 metres above ground, according to the following table:
| Wind Power Class | Description | Power Density at 50m (W/m2) |
|---|---|---|
| 1 | Poor | 0-200 |
| 2 | Marginal | 200-300 |
| 3 | Fair | 300-400 |
| 4 | Good | 400-500 |
| 5 | Excellent | 500-600 |
| 6 | Outstanding | 600-800 |
| 7 | Superb | 800-2000 |
Source: Wind Energy Resource Atlas of the United States (http://rredc.nrel.gov/wind/pubs/atlas/tables/A-8T.html)
Windographer classifies any wind resource with an average wind power density above 2000 W/m2 as class 8.
The wind power class appears on the Dataset Summary table, and the Summary Report.
See also
Calculating the mean wind power density at 50m