SG 2.1-122

Onshore wind turbine

Greater capacity factor
Boasting a 122-meter rotor combined with a 2.1 MW generator, the SG 2.1-122 is especially suited to Class S sites, thanks to its extremely low power density for a reduced Levelized Cost of Energy.
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Rotor diameter
122 m
Nominal Power
2.1 MW
Wind class
Key Facts
  •  Minimum power density and high efficiency for reduced LCoE
  •  One of the greatest capacity factors for low-wind low-turbulence conditions
  •  Proven technology with optimized design, prototyping, validation and industrialization processes
  •  High reliability, with an average fleet availability greater than 98%
Recommended for

Low wind, onshore locations

Other models in the platform
Model Rotor Dia. Wind type
SG 2.1-114 114 m For low to medium wind
SG 2.6-114 114 m For medium to high wind
SG 2.6-126 126 m For low to medium wind
SG 2.7-129 129 m For low to medium wind
A high performer in low-wind sites
Technical specification
General details
Rated power 2.1 MW
Wind class IEC III/S
Control Pitch and variable speed
Standard operating temperature Range from -20ºC to 40ºC (1)
Diameter 122 m
Swept area 11,690 m²
Rotational speed 13.07 rpm
Power density 179.64 W/m²
Length 60 m
Airfoils Siemens Gamesa
Material Fiberglass reinforced with epoxy or polyester resin
Type Multiple technologies available
Height 108 m and site-specific
Type 3 stages
Ratio 1:128.5 (50 Hz)
Type Doubly-fed induction machine
Voltage 690 V AC
Frequency 50 Hz/60 Hz
Protection class IP 54
Power factor 0.95 CAP-0.95 IND throughout the power range (2)

(1) Different versions and optional kits are available to adapt machinery to
high or low temperatures and saline or dusty environments.

(2) Power factor at generator output terminals, on low voltage side before
transformer input terminals.

One of the greatest capacity factors in low-wind sites
AEP increase SG 2.1-122 vs SG 2.1-114
The SG 2.1-122 wind turbine is an addition to the Siemens Gamesa 2.X product platform, a benchmark in the wind power sector thanks to its excellent capacity factor, high profitability, and installed base of over 50.7 GW. Specifically optimized for low-wind, low-turbulence conditions, this model seeks competitive positioning in markets with locations of this type, such as China and India, through its low power density and reduced Levelized Cost of Energy.
Technological Highlights
Our onshore approach is focused on geared technology, in which we have extensive knowledge and expertise. The hallmarks of Siemens Gamesa turbines are: reliability, robustness and a modular, flexible design for optimum adaptation and maximization of production at any site and in all wind conditions.
This turbine is equipped with blades made of fiberglass reinforced with epoxy or polyester resin. Together with the state-of-the-art aerodynamic profile, we can produce lighter blades having greater strength and improved dynamic behavior with less load transmitted to the rest of the components.
Turbine sensors continuously transmit data to our diagnostic centers, enabling the early detection of anomalies and preventing potential failures. By analyzing vibration patterns we can optimize your service plan and anticipate repairs before serious damage occurs.
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