It is easy to confuse power and energy. Power is a measure of the flow of energy and is measured in kilowatts (kW). Energy is the product of power and time and is measured in kilowatt-hours (kWh). The units shown on your electricity bills are in fact kWh. e.g. a turbine generating 3 kW continuous output for 20 hours will have produced 60 kWh (units) of electrical energy. e.g. a kettle with a 2 kW rating will consume 0.2 kWh if it runs for 6 minutes (1/10th of an hour).
Wind turbines are often described in terms of the maximum power they can produce e.g. 6 kW, 11 kW, 25 kW. However this figure on its own can be misleading as the actual power produced by a turbine varies with the wind speed. Manufacturers therefore normally give additional information in the form of a table or a graph called a ‘power curve’ showing the turbine performance for a range of wind speeds.
The annual energy yield that you can obtain from a turbine depends on the shape of its power curve and the range of wind speeds obtained at your site throughout the year. When comparing turbines therefore, it is not always the case that the turbine with the highest power rating will generate the most energy.
Wind energy capture is strongly related to the amount of air intercepted by the turbine rotor e.g. a 6m radius rotor sweeps an area 4 times greater than a 3m radius rotor. Bigger rotors therefore capture more wind and generate more energy.
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Whisper Wind Turbines
American Recovery and Re-investment Act (2009 Stimulus Package) expands small wind tax credits for homeowners, businesses
Qualified small wind turbines eligible for 30% tax credit, homeowners and businesses benefit from American Recovery and Re-investment Act (2009 Stimulus Package)
What does this mean for the average homeowner? FREE ELECTRICAL POWER!
On February 17, 2009 President Obama signed the American Recovery and Re-investment Act of 2009 into law. With a significant emphasis on renewable energy technology deployment and job expansion, the bill improved upon the 2008 tax credit, by removing “cost caps.” This change allows consumers and small businesses to take a 30% tax credit off the installed cost of a wind turbine. To a consumer or business purchasing a single 2.4KW residential wind turbine, it will double their credit. Additionally, businesses will also have the option of receiving their credit in the form of a cash grant. Read our FAQ on all the How's and Why's regarding this outstanding opportunity and what it means for YOU!
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Generates 2.5kW, and is a similar height to a telegraph pole. The Proven 2.5 can make a substantial contribution to the power required by electrical appliances in a standard 3 bedroom house (excluding heating). The robust 2.5 is also ideal for small lighting systems (Network Rail Stations, Sainsbur y’s) and offshore power (Shell North Sea Oil Platforms).
To get more information on how you can purchase a Proven 2.5kw Wind Turbine Generator or to schedule a certified Wind Site Assessment please contact us.
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Switzerland-based Jane and Robert Jann have been building a model for sustainable living in Awendo, Kenya, for several years. Along with food gardens and a home built using low-impact construction techniques, this site includes small-scale wind power to pump drinking water. The couple hopes that the site will serve as a case study for sustainable development and eventually supply UV-purified drinking water for people living in the area.
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Think of a Skystream 3.7 as any other household appliance. After your dealer installs it and connects it to your electric meter, you’re done. Nothing changes inside your house.
Your Skystream works in tandem with your electric utility to power your house. When the wind isn’t blowing, the utility supplies your electricity. But when it’s windy out, your Skystream provides clean, quiet electricity. When it generates more electricity than you need, your meter can actually spin backwards—which means you’re essentially selling electricity back to the utility.
Skystream 3.7, developed by Southwest Windpower in collaboration with the U.S. Department of Energy’s National Renewable Energy Laboratory, is the newest generation in residential wind technology. Skystream 3.7 has a 1.9 kW rating and is the first fully integrated small wind generator specifically designed for the grid-connected market. Skystream 3.7 is designed for homeowners looking to reduce or eliminate their monthly electric bills. Skystream 3.7 is a down-wind (wind hits the blades on the downwind side of the tower) direct drive (gearless or no transmission) permanent magnet wind generator. Skystream 3.7 uses an innovative 12-foot diameter rotor and produces approximately 400 kWh per month in a 12 mph average wind. Requires 8 mph for start up, 110 mph maximum. Skystream is available on towers ranging from 33 feet to 70 feet. It’s fully-integrated universal inverter delivers power compatible with any utility grid from 120 – 240 Vac. Skystream carries a 5-year warranty. Grid connected systems can incorporate “battery charging controller kit” for battery back up.
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units shown on your electricity bills are in fact kWh.
American Recovery and Re-investment Act (2009 Stimulus Package) expands small wind tax credits for homeowners, businesses
businesses to take a 30% tax credit off the installed cost of a wind turbine. To a consumer or business purchasing a single 2.4KW residential wind turbine, it will double their credit. Additionally, businesses will also have the option of receiving their credit in the form of a cash grant. Read our 
heating). The robust 2.5 is also ideal for small lighting systems (Network Rail Stations, Sainsbur y’s) and offshore power (Shell North Sea Oil Platforms).
Switzerland-based Jane and Robert Jann have been building a model for sustainable living in Awendo, Kenya, for several years. Along with food gardens and a home built using low-impact construction techniques, this site includes small-scale wind power to pump drinking water. The couple hopes that the site will serve as a case study for sustainable development and eventually supply UV-purified drinking water for people living in the area.
Your Skystream works in tandem with your electric utility to power your house. When the wind isn’t blowing, the utility supplies your electricity. But when it’s windy out, your Skystream provides clean, quiet electricity. When it generates more electricity than you need, your meter can actually spin backwards—which means you’re essentially selling electricity back to the utility.
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