Blue Skies Unlimited

Renewable energy solutions for sustainable living.

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Whisper H40
Whisper, a name with more than 10 years of experience in the field, has been reengineered and launched under the Southwest Windpower family of wind turbines. The Whisper's new look features a cast aluminum frame and smooth, quiet operation of the patented "angle-governor" furling design.

Wh The H40 is designed to operate in a site with medium to high wind speed averages of 12 mph, 5.4 m/s, and greater. The H40 provides 100+ kWh per month, 3.4 kWh per day, in a 12 mph average wind speed location. The H40, with its 7 ft. (2.1m) rotor diameter and 40 sq. ft. swept area, is rugged enough for extreme environments.

The redesigned H40 turbine incorporates a permanent magnet brushless alternator, which combined with Whisper's high efficiency composite airfoil blade design, delivers 900 watts peak power at 28 mph (12.5 m/s).

Applications - Stand-alone or hybrid Telecommunication applications, remote home and ranch applications.

New EZ Wire Controller - The H40 comes with the new EZ Wire II Controller that offers greater reliability and superior control for battery charging. Its compact, safe cabinet design features easily settable voltage regulation points, load dump and load dump isolation from the battery. The price of the system includes the H40 turbine and EZ Wire II Controller.

New Design Features - The H40 was redesigned in the fall of 1999

bulletStronger cast aluminum housing
bulletNew Angle-Governor provides higher maintained output while furling
bulletImproved current carrying capacity
bulletSealed yaw bearings
bulletTemperature tested from 40F (-40C) to 110F (43C)
bulletIncreased heat transfer for better cooling
bulletBlades: 3 injection-molded, fiber reinforced

Patented Angle-Governor

Exclusive to the Whisper, the side-furling Angle-Governor protects the turbine in high winds by turning the alternator and blades out of the wind, reducing turbine exposure. Unlike other wind turbines that lose as much as 80% of their output when furled, the Angle-Governor allows the Whisper to achieve maximum output in any wind.



Southwest Windpower would like to introduce the NEW EZWIRE II, the next-generation wind turbine controller that is now standard on 24V, 36V and 48V Whisper H40 and H80 Turbines.

THE NEW EZWIRE II is an intelligent SCR-based shunt-type Whisper controller that includes the following features:

bulletIndividually rectified phases (3 phase)
bullet Battery/Turbine/Shunt isolation during regulation battery bank is never connected to shunt load!

Hysteresis window during regulation to maximize useful power and keep batteries fully charged

Potentiometer adjustable Regulation Set point

Ceramic Power Resistors integrated into controller box

Automatic turbine over speed protection

Battery disconnect Auto-protection intelligence to protect turbine from Open-Circuit operation

Manual Diversion/Stop Switch enables user to divert full turbine load to resistor bank

24V, 36 and 48V operation available NOW! (12V version available April 2001)

Quiet diversion-powered fan No valuable battery energy is used here! (12V, 24V, 36V Only)

Large Heat-Sink for efficient temperature dissipation

Fully integrated, easy to install controller - Circuitry and Resistor Bank in one simple package!

Metallic enclosure designed for indoor operation in battery-bank room

Marine-grade version available as an option (Spring 2001)

Easy access Block connectors for Turbine and Battery wires

Bright LED lights to inform of regulation operation and Power ON


Turbine Specifications

Rotor diameter: 7' (2.1 meters)
Weight: 47 lbs (21 kg)
Mount: 2,5" Schedule 40
Start-Up wind speed: 7.5 mph (3.4 m/s)
Voltage: 12,24,32,48 VDC
Peak Power: 900 Watts @ 28 mph (12.5 m/s)