Renewable Energy Solutions

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500W wind turbine

Model: GI-H2.7-500W

500W wind turbine is designed for off-grid system which uses battery bank to store the power. It can drive resistive loads within 500W or 370W water pump etc inductive loads.


Please click the link below to download our 500W PDF brochure and keep it handy.


1. SCF Supercritical generator

Wind generator adopts SCF supercritical technology which won a gold award in the 37th Salon Eureka in Brussels. This technology makes real that the weight and size of hummer 500W generator are one-third of the traditional one, and the generator efficiency is improved from 0.22 ~ 0.28 to 0.45. This ensures that the generator functions perfectly in small wind condition.

2. SKF bearings

Wind turbine adopts two SKF (Svenska Kullager Fabriken) bearings which are produced by the largest bearing manufacturer in the world, with the perfect internal geometric structure, known for its life-time endurance and reliable quality. Ordinary bearings need to be changed every two or three years, while SKF bearings can greatly reduce the maintenance costs on this matter.   

3. Low noise

The design of the rotor blade of Hummer wind turbine absorbs the highlights of the small aircraft’s airfoil, which is compliance with the aerodynamic standards. It provides a more aesthetic look and a higher efficiency and reduces the noise production as much as possible.

4. Double braking protection

Wind turbine generally adopts the yawing system and the electromagnetic braking system to regulate the rotation of the wind turbine. It is easy and convenient to shut down the whole system both manually and automatically.  

                                           Rated power (W)                                                 500
                                           Maximum output power (W)                              1000
                                           Battery bank voltage (VDC)                                24
                                           Cut-in wind speed (m/s)                                    3
                                           Rated wind speed (m/s)                                    7
                                           Working wind speed (m/s)                                3-25
                                           Survival wind speed (m/s)                                 50
                                           Generator efficiency                                            >0.78
                                           Wind energy utilizing ratio (Cp)                         0.48
                                           Generator type                                                      Permanent Magnet Alternator
                                           Generator weight (kg)                                         6.5
                                           Blade material/quantity                                       GRP/3
                                           Blade diameter (m)                                             Ф2.5
                                           Speed regulation method                                  Yawing + Electromagnetic brake
                                           Shutting down method                                       Manual + Automatic

Structure and component parts: 


1. Generator Part

It is composed of the patented SCF generator, the nose cone, and the protection cover. Hummer adopts the state-of-the-art SCF supercritcial generator, which is installed in the hub, easy to radiate heat and reduce wind resistance. Made of high-efficiency magnetic materials, special copper alloy, high-strenghth stainless steel and aeronautic aluminum alloys, which is extremely light in weight and small in size, but with higer power producing efficicency.

2. Nose Cone & Protection Cover

Both of them are made of the reinforced aluminum alloy. Nose cone is fixed in front of the rotor blades to reduce the wind resistance and radiate the heat produced by the generator. While the protection cover between the rotor blades and the nose cone to provide extra protection to the generator.

3. SKF Bearings

Two SKF bearings ensure the reliability the longevity of our generator. Wide temperature ranges: operation in the high temperature (150-350ºC). Long life span, reach up to 60000-100000 hours. User may not change the bearing during the wind turbine using. It can greatly reduce the maintenance costs.

4. Flange & Blades

The flange is made of fine steel, used to fix the blades to the rotor. The blades are made of glass reinforced plastic, efficiently turn the wind energy into the mechanical energy. Every set of the three blades has passed the strict balance test before the shipping. It is important to fix the blades together which belongs to one set to the flange and never mix them up with other blades which belongs to another wind turbine.

5. Furling Mechanism

The mechanism is composed of the 360 degree rotation yaw shaft, the tail rod and the rudder blade, which are made of the manganese stell and aluminum alloy. It combines the high strength and the lightness and is able to react to the gusts rapidly.


6. Multi-function “3 in 1” Inverter Controller


 “3 in 1” inverter as a multi-function controller is made especially for 500W and 1000W systems. It combines the functions such as rectifying AC into DC, charging the batteries, inverting DC to AC to power the electrical instruments, and dumping the extra energy which may overload and burn the system, thus protecting the whole system.

7. Off-grid Inverter & On-grid Inverter

Off-grid inverter adopts SPWM (Sinusoidal Pulse Width Modulation) technology, is able to invert DC with higer efficiency into AC with stable frequency and voltage, filters the noise as well. It is used in the off-grid power system.

On-grid inverter adopts MPPT (Maximum Power Point Tracking) technology and IGBT (Insulated Gate Bipolar Transistor), is able to invert DC with a high power producing capacity and a wider AC voltage output range. It connects to the public grid and there is no need for any power storage device.

8. Rectifier/Dump Load Controller & Dump Load Box

The controller controls the process of which the alternative current produced by wind turbine into direct current and eventually charges the battery bank with DC. It also controls the switching on and off of the dump load to protect the system against the risk of being overloaded with too much power.

Metal box design of the dump load radiates the heat of the resistance inside quickly via the air convection. So there is no need for an extra fan.