I represent Southwest Windpower, a company that has been in the small wind business for more than 23 years. I am a big supporter of new companies entering the small wind turbine industry. No question there is a lot of opportunity in this space.
However, I draw the line when people hype conceptual drawings and present performance calculations that are clearly projected. How much energy a device can extract from the wind is a direct function of the diameter of the rotor times the cube of the wind speed. I find it very difficult to believe that a device with a 5-6’ rotor could develop 1500 watts unless it is in an extremely high wind. Few people live in places like this.
Wind turbines are not "garden Sculptures" they are designed to produce electricity. Proper siting, installation and maintenance all have dramatic affects on their performance.
If any individual or person is interested in investing in a renewable energy company:
1) Contact a University or the National Renewable Energy Labs (www.nrel.gov) and ask for a second opinion. As in their opinion that the design has both performance and economic merit.
If any individual or person is interested in investing in a wind generator:
2) Ask to see if the design has been tested and certified by an independent third party. Ask to speak with people that own one.
A small wind turbine can be a fun and worthwhile investment. Just make sure its tested and certified.