Performance testing ILWP 2,4

spinningLocation: Schoondijke, Netherlands

Installation date: 9 June 2013

 Test ended: 5 November 2013

 Wind turbine system specification:

Rotor Diameter 2400 mm
Generator 48 V, rated 700 W
Tower 14 m, free standing
Electronics SMA Windyboy 1100 LV with LDR 48-30 protection


Total energy produced: 172 kWh


The average wind speed during the test period was 3,6 m/s. This is less than the yearly average of 4 m/s at the test site.

Performance data have been logged with a 5 minutes interval. The daily energy production during the test period:

ILWP 2,4 energy totalThe power curve and efficiency factor Cp are derived from 42849 data points:

powercurve ILWP 2,4The average power and wind speed are presented in weekly graphs in archive power and details of the daily energy production can be found in archive energy.

The projected yearly energy yield compares very well to the numbers from Hugh Piggott’s work book:

ILWP 2,4 yield

Although the testing period was a little too short, the wind turbine passed the most important requirements from the duration test specified in the international standard for small wind turbines IEC61400-2:

ILWP 2,4 duration test 

News posts about the performance testing of ILWP 2,4: