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Kestrel Renewable Energy

E400NB (3.5kW) with Mechanical Brake

E400NB (3.5kW) with Mechanical Brake

The Kestrel e400nb micro wind turbine is fitted with a mechanical band brake that will stop the turbine safely in severe wind conditions. The brake is activated by a simple manual operation at the base of the tower.

Electricity produced by the turbine is processed by an electronic inverter and fed into the grid. The electricity supply is preferentially wind power and any shortfall during peak demand is supplied by the grid. The end user's energy bill is therefore reduced by the amount of wind energy harvested.

This wind turbine comes standard with Kestrel’s patented pitch control. The blade pitch angle is adjusted automatically in high wind speeds, thereby ensuring maximum power output while reducing the thrust force on the turbine.

The Kestrel e400nb is rated at 3.5kW and, being a high-quality machine, has a mass of 250kg with a blade rotor diameter of 4m. Note: The same wind turbine is available in selected countries without the mechanical brake and is designated the e400n.


Technical Specifications:

Note: Performance may vary with

Battery Charging

Grid Tied

Site Conditions and Weather Pattern

Manufacturers Data

MCS/BWEA Reference


Maximum Power 3500W (Peak turbine) 2990W -
Rated Power @ 11m/s (24.6mph) 2500 (At battery) 2550W 2.5kW
Rated Annual Energy 4000 3922kWh 3930kWh
Rated sound Level 56dB(A) Lp,60m: 57dB(A) 55.6dB(A)
Cut-in Wind Speed <span"></span">3.25m/s 3.25m/s 3.25m/s
Generator Type Permanent-magnet Permanent-magnet Permanent-magnet
Overspeed Protection Pitch Control Pitch Control Pitch Control
Rotor Diameter 4m (13.1ft) 4m (13.1ft) 4m (13.1ft)
Number of blades 3 3 3
Blade Material Epoxy Resin Fibreglass Epoxy Resin Fibreglass Epoxy Resin Fibreglass
Tower Top Mass 250kg (551lb) 250kg (551lb) 250kg (551lb)
Tower Height 12-18m (39-59ft) 12-18m (39-59ft) 12-18m (39-59ft)
Tower Type Monopole Monopole Monopole
Output Voltage (Turbine) 48Vdc or 110Vdc * 250Vdc 250Vdc
Controller Type Midnite Solar Power One Aurora Power One Aurora
*Voltage limiter required for 110Vdc Classic 200 PVI-3.6-TL-OUTD-W PVI-3.6-OUTD-US-W
Output Voltage (System) 24/48/60Vdc 230Vac 50Hz 240V 60Hz
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