Small Wind Turbines for Home

An Introduction To The World Of Wind-Generated Power

There are two main types of wind turbine technology.  The first, Horizontal Axis Wind Turbines, are usually mounted on towers and use propellers to transform the wind's energy.  The second, Vertical Axis Wind Turbines, has blades that rotate on a vertical axis to convert the wind's energy. 

Each turbine is rated based on how much power it generates in certain wind conditions.  Turbines are usually considered 'small' if they produce fewer than 100 kW per hour.  However, ratings can be inconsistent, with some turbines rated while running at different speeds than those at which other turbines are rated.

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When deciding what turbine generator meets your specific needs, it is a good idea to have an idea both of how many kWhs you typically use in a month (so you know how much power you are trying to supplement) and of the kWh-ratings of the various generators you are considering, so you can accurately match the right product to your needs. 

The 'cut-in speed' refers to the wind speed at which your blades and rotor will be spinning quickly enough to produce electricity.  Generally, winds of at least 10 mph are required to actually generate electricity, though the turbine will still spin at lower, unproductive speeds.  Remember to keep in mind that your area's average wind speed says nothing about how OFTEN winds actually reach certain speeds. 

Anemometers are very helpful in determining whether a particular location will work for your turbine generator.  The site, amazon.com, has great-quality anemometers for about $100 ( click here for a recommended anemometer).  Remember that your anemometer readings should be spread out over a year or two to get accurate predictions of wind patterns and changes in the weather.  If you are not prepared to put this much work into finding the right location, simply check weather websites for statistics.  Though they will be slightly different from your exact location, this can save you a lot of time and money.

The biggest factor that can affect the average wind speed of a particular site is how many nearby obstructions like trees and buildings are present.  Ideally, you should find a location that is as clear as possible on all sides.  If there are some obstructions, it is a good idea to try and get your rotor and generator elevated at least 30 feet above the nearest obstruction.  Another thing that can affect the wind at your site is the area's topographical shape.  Try to find topographical maps and determine the best location possible. 

Once you have your site selected, make sure that the turbine you are considering building or installing is suited for your site.  It should not be too tall, too short, too large, or too small for the area where you are installing it.  And remember to shop around before you buy anything.  Finding the best deal on small wind turbines for home use is an important part of getting the most out of your investment.