Swept area

The Skystream 3.7 has a blade diameter of 3.72 metres. This means it has a swept area, or capture area of 10.87 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.

Skystream 3.7 power output curve

The graph below shows the power produced (in watts) for the Skystream 3.7 at different wind speeds, based on data supplied by the manufacturer.

Whilst the above graph gives an indication of the instantaneous power you might expect from the Skystream 3.7 turbine, working out annual power production is more complex. The only way to know for sure is by measuring your wind speeds using an anemometer for a period of time and then working out what a generator like this would produce. Luckily, we've invented something that makes this easy, called the Power Predictor!

The Skystream 3.7 wind turbine in action

Skystream wind turbine in Washington DC at the US Botanic Gardens

This is a pretty serious machine which, with good siting will provide a decent amount of power.

The Skystream 3.7 costs between $12,000 (around £6,000) to $15,000 (£7,500) to purchase and install, although costs vary significantly depending on your site. The generator itself costs $5,400 (£2,700).
Segen are offering an installed Skystream for £8550 +VAT

We have no direct experience of this turbine. If you have any views or comments to add, please leave them below.

3.72 metres

2400

No

Five year limited warranty

120 Volt • 240 Volt AC

SouthWest Wind Power (USA)

USA

Permanent magnet

14

Electronically stalled