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As a matter of fact, your generator would be hooked up with the utility grid and this way, you might actually sell the additional power to the utility in case you produce more power than what you need. In case of a usual residential application, a residence is served concurrently by wind turbine, as well as local utility. In case the wind speeds get below the cut-in speed, then there would be no output from this turbine and the entire required power is bought from the utility. So many people are talking about the global warming these days but not many are actually doing something about it, you will not only save money by building your wind power system but you will be one that is actually doing something about the environment. Its also economically advantageous to invest in renewable energy. In earlier years these turbines were widely criticized for being too bulky and space consuming. With modern advances turbines can be installed right on your roof for an affordable price. Well, then this is the article can get you startedOne of the things that you will absolutely need to be sure of, is that where ever you plan on building your wind turbine, it is free of obstacles such as buildings and trees, for you do not want anything to interfere with the propellers. You want as much wind power as possible to ensure that you are getting the most out of your wind turbine. One of the greatest things about a wind turbine, is that you have the power to increase the strength of the wind that gets through to the propellers. All you need to do is raise the tower upwards. Many people are tempted to build their own turbine blades out of PVC pipe. This is unadvisable because PVC pipe is meant to be buried in the ground and direct sunlight degrades its integrity. You would need to paint it frequently to keep it protected from light. These homemade blades are also very weak and break at very low wind speeds.
Source: GE Wind Turbines