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The growing popularity of small wind turbines is due largely to their greatly improved reliability. In contrast to the  designs of a decade ago with complicated drive trains and mechanical governors, these machines are the height of simplicity. They typically use direct drive permanent magnet generator and automatically furl the rotor in high winds. No simpler means for controlling wind turbines has ever been devised.

These advanced small wind turbines are represented by Southwest Windpower’s Windseeker and  Air series, World Power Technologies’ Whisper series, and Bergey Windpower’s 850, 1500, and Excel models.

Manufacturers expect further refinements of these designs in the years ahead as incremental improvements continue to boost performance and result in lower costs. No one expects any earth-shaking new breakthrough will revolutionize small wind turbines. As Ed Wulf found near Tehachapi, wind energy is here today. Wind works.

First and most important of all you need a place to put the wind turbine. The site should be well exposed to the wind and free of any obstructions within 200 feet. If there are any nearby trees, the turbine must be mounted on a tower at least 30 feet above the tallest tree. And keep in mind that trees often grow taller, particularly softwoods.

Next, determine if you have enough wind. Hybrid power systems for living off-the grid require less wind than those that have to compete directly with utility power. If possible, measure the wind at your site with a recording anemometer over several seasons.

Next you need a reliable wind turbine. There are several on the market and we offer the ones we’ve found to be most reliable in our Product Section. The appendix of Wind Power for Home & business (item 80-192, $35) contains an extensive and up-to-date list of wind turbine manufacturers worldwide. The appendix lists most available wind turbines, including micro turbines, small wind turbines, and medium-sized wind turbines like those used in California wind farms.

Then determine the height of tower you need. “The taller the tower, the greater the power” is an adage that has been proven time and again. For micro turbines, towers of 40-60 feet tall may be sufficient. Small wind turbines typically justify towers 100 feet tall or more depending upon the terrain.

And don’t forget the paperwork. Check if there are any regulations governing home wind turbines in your area and apply for any necessary permits.

Above all don’t cut corners. If wind power systems are designed and installed with care, they will last a lifetime. For more on how to build your own wind turbine, and how to install them safely see home wind turbine.
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