Safest Small Wind Turbine in the World

Workingwindmills.com is proud to introduce the Endurance Electric Wind Turbine which was designed by 3 world renowned wind energy engineers who set out to create a turbine that had all the features of a Large Wind Turbine but the affordability and production capacity of a Small Wind Turbine.

Among these engineers are David Laino, PHD in Aeronautical Engineering, Dean Davis, Masters in Mechanical Engineering who have been testing and designing small and large wind turbines for decades. They successfully the Endurance S-250 - A SAFE, RELIABLE, QUIET and EFFICIENT turbine for today’s changing market needs.

The US National Renewable Energy Lab in Colorado have been testing one of the Endurance models for over 18 months and have approved it for certification in all states that have requested prove of testing. The most stringent of which is New York’s NYSERDA rebate program. Other states that have approved the Endurance are California, Vermont, Iowa, Massachusetts, Wisconsin. No state has rejected approval of the Endurance.

As a matter of fact the Endurance is living up to its name - one of their customer’s and dealers sent us a note just a few days ago stating that the Endurance not only survived Hurricane NOEL but it produced over 54 KWH in as short a time period as 18 hours. IF this was not impressive enough the customer noted that he could not even hear the Wind Turbine. It has been designed to be quieter than the breeze through trees.

The Endurance S-250 is produced in North America and built with Long lasting and proven parts sourced through American Manufacturers. Its product life expectancy is 40 - 50 years giving customers an opportunity to buy an electric wind turbine that can produce power for most of their life.

Endurance Wind Power is committed to helping North Americans produce their own power so that they can safe guard their way of life.

Visit the endurance wind power site and learn more about the Endurance Wind Turbine S-250 - North America’s only small wind turbine that has been designed and built with all the large wind turbine Safety, Noise and Performance Standards.

• Dual Brake Fault Tolerant Brake Systems for Fail SAFE Breaking of wind turbine
• Proprietary Blade Design and Constant Rotor Speed to improve performance and ensure quiet operation (production of power is produced in between an impressive low rotor speed of 200-206 RPM) - quieter than any other small wind turbine - quieter the breeze through trees.
• Reliability - built with top quality American parts to last 40-50 Years
• On-Grid - Just Plug it in to the Grid - Induction Generator - increasing reliability and performance - no power conversion necessary for the Endurance produces power at Grid compatible frequencies.

At the Endurance Test Facility in Spanish Fork, the Endurance S-250 set new records for power production over the last 24 hours. The two Endurance S-250 wind turbines produced nearly 200kWh of electricity. The previous record was set by one of our customers in Iowa, Jeff Matt, who had a record production of 89kWh in a single 24-hour period for a single turbine.

The Endurance design makes this tremendous power production possible for the following reasons:

1. Because our power curve comes up and flattens out (stall control) at the higher wind speeds, we continue to generate near rated power even during very windy periods. All other small wind turbines are furling turbines and will have a power curve that drops drastically at the higher wind speeds (you will see this when you look at power curves that are published), making these other small wind turbines unable to capitalize on really windy periods. They also tend to get pushed to fully furled in a gust but then will stay fully furled even as the wind drops.

2. Often, rated power (for other small wind turbines) represents some type of peak or instantaneous value, and it will never equate out to energy. If you use our rated power range of 4.5-5kW and multiply by 24 hours you can see that theoretically we could do 108 kWh/day. The fact that we did 100 kWh/day represents that the 4.5-5kW rating is real.

3. The Endurance wind turbine produces grid compatible energy right at the turbine and we are not converting DC generated energy to AC. Therefore, when we note 100 kWh, this is recorded for actual numbers back-fed onto the utility meter not off the turbine. Other small wind turbines produce DC energy and have a permanent magnet generator that needs an inverter to convert the DC energy to AC for the grid. This conversion process will reduce actual grid compatible energy anywhere from 15-25%.

4. As rare as it might be in our Spanish Fork test site location for the wind to persist all day, for our customers in the Midwestern states that have continuous winds all day, especially during storm seasons, these customers should expect to see big production days like this.

So how windy was it? The average wind speed was 14.6m/s (33 mph) with a peak wind speed of 24m/s (54 mph).

One of Endurance’s customers in Iowa had a record production day, producing 89KWH in less than a 24hr period. Over a month, providing the winds remained constant, that would translate to 2670KWH. Although the probability of the winds persisting is negligible, it does confirm that the Endurance produces some incredible energy production numbers.

Better yet, at our test facility in Spanish Fork on Tuesday, December 4, 2007, the Endurance S-250 Wind Turbine produced 100KWH in less than 24 hours. The average hub height wind speed was 33mph with a peak of 54mph. This would translate into 3000 KWH of power generated in one month - if winds remained the same for a 30 day period.

To give you an idea of the power production of the Endurance - an average North American Home consumes approximately 20-30KWH/day. So, a power production of 100KWH could essentially run between 4-5 average-sized American homes.