Honeywell WT6500 Wind Turbine Hot

Honeywell WT6500 Wind Turbine

The Windtronics turbine is a gearless wind turbine that loosely resembled a bicycle wheel encircled by a cowl. Unlike most turbines, which generate power at the hub, this device has a a series of magnets positioned around the outside of the rotor. They are aiming at the rooftop wind turbine market. By the looks of it, Windtronics have done well on their marketing and press coverage and seem to have a distribution deal lined up with US DIY chain Ace hardware. Only available commercially from Spring 2010.

Wind turbines

Swept area

The Honeywell Wind Turbine has a blade diameter of 1.80 metres. This means it has a swept area, or capture area of 2.54 square metres. This is all important when comparing wind turbines, since it directly relates to the amount of passing wind energy the turbine blades can intercept.

Honeywell Wind Turbine power output curve

The graph below shows the power produced (in watts) for the Honeywell Wind Turbine at different wind speeds, based on data supplied by the manufacturer.

The green line shows the actual output that the wind turbine achieves at the given wind speed, according to the manufacturers.The dashed line in the graph shows the theoretical maximum energy that this turbine could extract from the wind, according to Betz's Law (59.3%). At a typical wind speed of 5 m/s, the Honeywell Wind Turbine is extracting 111 Watts of power from the wind, which is an efficiency of 56.74%.

If you want to install a wind turbine, it is very important to measure how much energy you might produce.
Learn more about the Power Predictor

How efficient is the Honeywell Wind Turbine?

Wind turbines can only convert some of the energy in the wind into electricity. The graph here shows how efficient the turbine is across the range of wind speeds you might get.

The orange line in the above graph shows the efficiency ranging from 0 to 1. The grey line is the previously mentioned maximum efficiency - The Betz Limit. If this limit is exceeded, the manufacturer's claims are not to be trusted!

While these graphs give an indication of the instantaneous power and efficiencies you might expect from the Honeywell Wind Turbine turbine, working out annual power production is more complex.

Read more about the Power Predictor

The Honeywell Wind Turbine wind turbine in action

Promotional video about the Honeywell wind turbine from the manufacturers, Earthtronics

video credit: earthtronicsusa

Power output
Around 170W at 5 metres per second means that, like nearly all rooftop wind turbines, the size of this machine will not make a significant dent in your home electricity bills.
$5,995 with an average installation cost of $1,500. Based on an exchange rate of 1 dollar = 0.6 GBP, that's an all inclusive cost of £4,497.
Our view
Slick website, design and marketing, but sadly the truth is that based on the data, it seems to us that the Honeywell WT6500 is really just another rooftop white elephant.
Blade diameter
1.80 metres
Rated output (W)
UK grants available?
5 year manufacturers warranty
120 Volt • 220 Volt AC
Noise levels
Less than 35dB
Country of origin
Generator type
Permanent magnet
Governing wind speed (m/s)
Comments (5)Add Comment
written by clagnut, March 08, 2012
This thing is amazing; I can almost boil a kettle from a week's worth of generation!
written by doms, July 27, 2010
Hello andyg,

Thanks for pointing out the error on the rated power. It doesn't change the fact that the manufacturers claims are grossly exaggerated. We're not the only people that think so:
written by andyg, July 26, 2010
This review appears to be very poorly researched.
I have no connection to Honeywell, i am just interested in these technologies.

The wt6500 is a 'ducted rotor' design which can capture more energy from swept area than plain rotors of the same size. You cannot apply the same energy calculation formulas as used for non-ducted designs. The ducting boosts aerodynamics and reduces noise which is mostly generated at the blade tips.

Where does the rated output of 2752 W quoted come from?
Is this a misapplied typo of the 2572 kWh per year which the manufacturers claim for good conditions?
written by Toby H, January 19, 2010
Hi Paul

Are you serious? In our view this thing is a complete white elephant, as the review says! We don't have any more details anyway I'm afraid, try the manufacturer's website...


written by Paul Bickerstaff, December 15, 2009
like the looks of this unit could you please supply me more dettails

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