Wind turbine is a kind of kinetic machine which transforms the wind energy into mechanical energy and finally generates electricity without using fuel.

A wind turbine consists of blades, generator, tower, and controlling system. According to the difference of rotating axis, there are horizontal axis wind turbines(HAWT) and vertical axis wind turbines(VAWT). Presently most of the wind turbines are HAWT type.

Wind-solar hybrid power system include:

a. WIND GENERATOR :generates electricity from wind energy

b. TOWER : holds up the wind turbine system

c. SOLAR PANEL: generates electricity from solar energy

d. CONTROLLER :charge batteries, over-speed protection, time adjusted

e. BATTERY : charge & discharge

f. INVERTOR : invert direct current into alternating current

g. END USER

Wind power system is same as above when we remove the solar panel:

Professional --- Get information from local meteorological station.

Wind is usually measured by its speed and direction. Wind atlases show the distribution of wind speeds on a broad scale, giving a graphical representation of mean wind speed (for a specified height) across an area. They are compiled by local meteorological station measurements or other wind-related recorded data. Traditionally, wind speed is measured by anemometers – usually three cups that capture the wind rotating around a vertical axis. The wind direction is measured with weather vanes. After measuring wind data for at least one year, the mean annual wind speed can be calculated. Wind speed and wind direction statistics are visualised in a wind rose, showing the statistical repartition of wind speed per direction.

Wind statistics show the best sites to locate wind turbines according to the best wind resources. Most of Pro-An's wind turbines start working between 1m/s to 2.5 m/s. For specific starting-up speed of each model please visit "Product" page to review.

Measure approx wind speed by yourself

Use an anemometer to measure the wind speed.

Pro-An produce small and medium sized wind turbines, from 50W to 20KW.And we generally divide them into three categories:

Mini Type:50W.100W.150W.250W                         Rotor Diameter less than 1 meter

Small Type:400W.600W.1000W.2000W.3000W      Rotor Diameter around 1 meter to 3 meters

High Power Type:5KW.10KW.20KW                      Rotor Diameter around 6 meters to 10 meters

The towers are mostly tubular and made of steel or concrete, generally painted light grey. The blades are made of glass-fibre reinforced polyester or wood-epoxy. They are light grey because it is inconspicuous under most lighting conditions. The finish is matt, to reduce reflected light.

Wind turbines stop running when there is too little or too much wind: if wind speed is lower than starting-speed, blades will not run; if the wind is too strong, the turbine needs to be shut down because it could be damaged. Another situation is the batteries are full-charged, wind turbine will also shut down automatically.

According to the feedback from Pro-An's customers, our wind turbines have been save electricity bills for end-users from 40% to 80%.The specific saved amount depends on your local wind speed, and solar radiation.