GREEF DDG series generator have following features:

Low rated rotate speed, Low start wind speed, Low weight and small size, low High efficiency

(1) Torque Patent Technology: use newest “Precise Coil” technology. No hysteresis and gear notches effect make the start torque very low <1N.M

(2) Original Structure: use disc coreless motor to take place traditional motor makes it less volume and weight.

(3) Higher Utilization: use special coreless motor technology to eliminate the use bottlenecks of lower speed wind energy.

(4) Higher Reliability: special structure make it bigger ratio of power to volume, power to weight and have long life of 8 times longer than traditional motor.

(5) Gearless, direct drive, low RPM generator.

(6) High standard, quality components for use in harsh and extreme environments for wind turbines

(7) High efficiency and Low mechanical resistance energy loss

(8) Excellent heat dissipation due to the Aluminum alloy outer frame and special internal structure.

They are always being used in vertical axis wind turbine, and other generator system which requests very low start torque and low RPM.

1. Generator use inner foam protection outer Plywooden case .Generator shaft use pipe protection.
2. Pakage size and weight please refer to our sales.
3. Shipping by sea with FCL LCL or by air .
If you have any request in package and shipping please tell our sales we will do according to your request.

OEM service

Generators are free 3 years warranty, All lifelong technical support and part cost supply.

(1) The warranty period is start from the date of shipment which show on the bill of loading or air waybill.
(2) Free maintenance services during the warranty period the cost involved be borne by the company, do not charge a fee to customers, free warranty if any damage outside the warranty period, the company will charge a fee for labor costs and materials.
(3) the warranty period, company's quality problems caused by the maintenance of the freight borne by the company, if not under warranty or man-made damage, the freight charges by the customer.

1. Q: Does installation Easy ?
A: Very easy, every customer can doin by themselves, we will supply all the components for installation and very details installation manual.

2.Q: Which model is suitable for me?
A: Please contact our sales with following points :
1. What appliance do you want to running by the system? How many watts are they and their working time .
2. Your annual wind speed .
3. What kinds of system do you want ? On-grid or off-grid

3.Q: Can I only buy parts not whole system?
A: Yes,for example you can manufacture tower in local , we can supply you tower drawing .

Any other questions, please feel free to contact us.