A typical home uses approximately 10,932 kilowatt-hours (kWh) of electricity per year (about 911 kWh per month). Depending on the average wind speed in the area, a wind turbine rated in the range of 5 to 15 kW would be required to make a significant contribution to this demand.

Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity.

Why do the turbines not spin at times? The most common reason that turbines stop spinning is because the wind is not blowing fast enough. Most wind turbines need a sustained wind speed of 9 MPH or higher to operate.

About 90% of the installed wind turbines today have three rotor blades. On the other hand, a turbine with three blades has very little vibration or chatter. This is because when one blade is in the horizontal position, its resistance to the yaw force is counter-balanced by the two other blades.

The design life of a good quality modern wind turbine is 20 years. Depending on how windy and turbulent the site is, the turbine could last for 25 years or even longer, though as with anything mechanical, the maintenance costs will increase as it gets older.

Most efficient wind turbine:

Model SIKCO-400M

Rated power 400W

Maximum power 460W

Rated voltage 12V/24V

Start-up wind speed 2.5m/s

Rated wind speed 12.0m/s

Safety wind speed 50m/s

Rated speed(r/min) 800

generator case material Die-casting aluminum

Wheel diameter 1.55m

Number of blades 3/5

Length of blades 60cm

Blades material carbon fibre composite

Generator type Three phase permanent magnet AC

Magnet material generator NdFeB

Control system Electromagnetism/

Deflection of wind wheel

Speed regulation Electronically controlled yaw

Working temperature -40°C - 80°C

Design life 20 yrs

Certificates CE, ISO 9001/GMC

G.W   9.8KG

Carton size 680*370*230mm

Packing method carton+foam