# Power

**Purly physical power (P) is defined as the rate at which work is performed or energy is transmitted, or the amount of energy required or expended for a given unit of time.**

The power per m² is calculated as such: Air density in kg/m³ multiplied with the third power of the wind speed in m/s times a factor 0.5.

The amount of energy which the wind transfers to the rotor depends on the density of the air, the rotor area, and the wind speed.

# Power Output

The table below shows the power output for certain wind speeds ^{(}*^{,} **^{)} in W/m².

* Power (P) in Watt / m² is calculated according to: P = ½ *1.225 kg/m³ *v³

** Air density of 1.225 kg/m³ at 15°C

m/s | W/m² | m/s | W/m² | m/s | W/m² | ||
---|---|---|---|---|---|---|---|

0 | 0 | 8 | 313.6 | 16 | 2508.8 | ||

1 | 0.6 | 9 | 446.5 | 17 | 3009.2 | ||

2 | 4.9 | 10 | 612.5 | 18 | 3572.1 | ||

3 | 16.5 | 11 | 815.2 | 19 | 4201.1 | ||

4 | 39.2 | 12 | 1058.4 | 20 | 4900.0 | ||

5 | 76.6 | 13 | 1345.7 | 21 | 5672.4 | ||

6 | 132.2 | 14 | 1680.7 | 22 | 6521.9 | ||

7 | 210.1 | 15 | 2057.2 | 23 | 7452.3 |