Micro wind turbines
Air 40 Wind Turbine
Designed for moderate wind environments, the AIR 40 delivers consistent off-grid power with ultra-quiet operation and reliable battery charging.
Download Spec Sheet
Why choose the AIR 40
The AIR 40 is designed for land-based sites with moderate wind, delivering quiet, reliable off-grid power and consistent battery charging.
Advanced microprocessor technology for efficient performance
Quiet, durable blades optimised for energy capture
Lightweight, easy-to-install design with integrated controller
Pairs well with solar PV to balance seasonal output
Generates up to 40 kWh per month at 5.5 m/s wind speed
Real-world uses for this turbine
Built for locations that need reliable power without the grid
Small-scale water pumping
Used to support low-energy water pumping systems for agricultural or residential use in off-grid locations.
In detail
Everything you need to know about the AIR 40
The AIR 40 is engineered for quieter, more efficient performance in moderate wind conditions. As the next generation of the world’s most popular small wind turbine — with over 180,000 units sold globally — it’s trusted for reliable off-grid power across a wide range of applications.
Its advanced microprocessor optimises battery charging and overall output, especially in lower wind speeds. The turbine also features a redesigned control system that reduces blade flutter and eliminates the typical buzzing sound found in many small wind generators.
By actively managing blade rotation and peak power tracking, the AIR 40 maximises performance while maintaining ultra-quiet operation — making it ideal for residential and light commercial use in off-grid settings.
Data sheet
Everything you need to know about the performance and build of this model in one place
VALUE
SPECIFICATION
Energy
Approx. 40 kWh/mo at 5.5 m/s (12 mph)
Swept Area
1.07 m2 (11.5 ft2)
Rotor Diameter
1.17 m (46 in)
Weight
5.9 kg (13 lb)
Shipping Dimensions
686 x 318 x 229 mm (27 x 12.5 x 9 in) 7.7 kg (17 lb)
Startup Wind Speed
3.1 m/s (7 mph)
Voltage
12, 24, and 48 VDC
Turbine Controller
Microprocessor-based smart controller
Body
Permanent mold cast aluminum basic finish-grey
Blades
(3) Injection-molded composite
Alternator
Permanent magnet brushless
Overspeed Protection
Electronic torque control
Survival Wind Speed
40.2 m/s (90 mph)
Mount
1.5 in schedule 40 pipe 48 mm (1.9 in) outer diameter
Performance
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See how this model performs and what kind of energy it can deliver in real conditions
Gallery
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