20 kW Vertical Axis Wind Turbine (H-Type)

Name: 20 kW vertical axis wind turbine
Brand: WINDTURBINE
SKU: GH-H20K
Availability: InStock

The GH-H20K is a 6 m diameter, 8 m tall H-rotor — 48 m² of swept area — on a 12, 15 or 18 m free-standing tower. Five aluminium-alloy blades, three layers of inner blades for starting torque, a disc-type coreless permanent-magnet generator at the base of the shaft. Cut-in 2.2 m/s, rated wind 12 m/s, survival 45 m/s, IP55 from -50 °C to +60 °C.

At a 5.5 m/s mean it delivers around 30,000 kWh a year, which is a lodge, a small campus or a 15-house village cluster. The reason to choose it over a 20 kW horizontal axis machine is not output — the H-rotor gives up 20–30 % of that — it is that the generator, brake and slip-ring-free shaft all sit at ground level, and the machine stays quiet and productive when the wind shifts 90° between gusts.

Technical specification

Parameter	Value
Peak power	22 kW
Rated wind speed	12 m/s
Cut-in wind speed	2.2 m/s
Survival wind speed	45 m/s
Rotor diameter	6.0 m
Blade height	8.0 m
Swept area	48 m²
Blades	5 × aluminium alloy
Rotor configuration	3 layers of inner blades
Generator	Disc-type coreless PMG
Output	DC 220 / AC 380 V
Tower	12 / 15 / 18 m
Nacelle protection	IP55
Noise	45 dB
Operating temperature	-50 °C to +60 °C
Design life	20 years
Annual output (5 m/s mean)	≈ 30,000 kWh
Warranty	3 years (5 structural)

Price depends on tower height, controller and battery bank — ask for a quote with your site details.

Design details

6 m × 8 m rotor, 48 m² swept area

Five blades with three inner blade layers. Low tip speed keeps noise at 45 dB and blade erosion low in sand and salt spray.

Generator at ground level

No nacelle work at 15 m. All electrical connections, the brake and the controller are reachable from a standing position — the maintenance cost difference over ten years is larger than the price difference.

No yaw, no tail, no slip ring

Wind from any quarter produces torque. There is no yaw drive to seize in a coastal site and no tail vane to fatigue.

45 m/s survival, IP55

Rated for gusty coasts and ridges. Not a typhoon machine — if your site sees 55 m/s, specify the GH-D series instead.

Where it is used

Lodges, camps and resorts

Runs a 5–8 kW baseload through the night with a 30 kWh battery, on sites where a diesel generator is the only alternative and fuel delivery is the real cost.

Village micro-grids

Three units plus 20 kW of PV and a 60 kWh bank make a stable island grid for 15–20 households.

Telecom clusters and remote industry

Two or three H-rotors in a row, feeding a 48 V DC bus, avoid the single-point failure of one larger machine.

Frequently asked questions

How much does a 20 kW vertical axis wind turbine cost?

USD 18,000–24,000 ex-works with generator and controller, and USD 38,000–52,000 installed with tower, foundation and electrical works. The tower and civil works are roughly a third of the installed price.

20 kW vertical axis or 20 kW horizontal axis?

On open land with a clear prevailing wind, buy the horizontal axis GH-A20K: it produces 20–30 % more energy and costs 10–20 % less. Buy the H-rotor where the wind is turbulent, where the tower height is capped, or where the noise limit at the boundary is 45 dB.

How is it transported and erected?

The tower ships in three sections in one 40 ft container, blades and arms in a second. Erection needs a 25 t crane for one day; no concrete beyond a 3 m pad.

Can several units share one controller?

Yes — up to four GH-H20K units can feed a common DC bus with one hybrid controller, which is often cheaper than one 80 kW machine and keeps the site generating when one unit is down for service.