Introduction:Wind turbines capture wind energy and transform it into kinetic energy which is then converted into electricity. Turbines come in a range of sizes and designs and can be freestanding, mounted on a building or integrated into a building structure (Pennycook, 2008). Types of Systems: There are basically two types of wind turbines: horizontal-axis design and vertical-axis design. Horizontal axis wind turbines are the most commonly used type and come in various sizes. This type of turbine has a horizontal rotor shaft and a generator usually located at the top of a tower. Propeller type blades are used to catch the wind, so they are oriented into the wind, for example for small turbines a wind vane is used, or if it is larger turbines, wind sensors will be used along with servo motors. A turbine system includes the following: a rotor, or blades, that convert wind energy into shaft rotational energy; a nacelle containing a transmission, usually including a gearbox (some wind turbines can also operate without a gearbox), a tower which is intended to support the rotor and the transmission. There is electronic equipment such as controls, electrical cables, ground support equipment and interconnection equipment (Pennycook, 2008). Fig 1: The following image shows some components of a horizontal wind turbine. Source: (Alexander, 2008) Typically, vertical axis turbines are known to have the rotor shaft oriented vertically. This circumvents the need for a tower and the generator is located at ground level. It also has the advantage of not needing a yaw mechanism to turn the rotor in the direction of the wind. The main disadvantages of vertical axis turbines are that the efficiency is low... half the paper... generates 1 to 5KW (kilowatts) of energy. However, if the development is outside of a covered or off-grid area where it will depend only on the wind turbine for energy, this will intensely increase the demands (Cooper, 2010). When sizing a wind turbine for a home, you first determine how much energy you need to supply to your home. There is another option which is to use an energy calculator; there is one located on the website: www.thesolarguide.com. This demonstrates how to get the total kilowatt hours you need. According to the American Wind Energy Association, homes consume approximately 9,400 kilowatt hours (KWh) of electricity per year (about 780 Kwh per month). To make a substantial contribution and meet demand based on the average wind speed in the area, a wind turbine with an output of between 5 and 15 kilowatts would be needed (Cooper, 2010).