SG 4.7-155

Onshore wind turbine

Greater performance for low wind sites
The new SG 4.7-155 turbine is the latest addition to the Siemens Gamesa product portfolio. Expanding the Siemens Gamesa 4.X platform to increase production and reduce LCoE, it offers an optimal solution for low wind sites.
Customer Contact

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Rotor diameter
155 m
Nominal power
4.7 MW
Special features
Key Facts
  • Blade designed with pultruded carbon technology already tested in the Siemens Gamesa 5.X platform, optimized for lower load demands
  • Flexible power rating to configure a uniquely tailored solution that fits the specific site conditions
  • Structural modularity for increased mechanical capacity and optimal adaptation to local wind requirements
  • Broad portfolio of turbine options
Recommended for

Low winds, onshore location

Other models in the platform
Model Rotor Dia. Wind type
SG 5.0-132 132 m For high winds
SG 5.0-145 145 m For medium winds
Siemens Gamesa’s commitment to create value
Technical specification
General details
Rated power 4.7 MW
Flexible power rating 4.0-5.0 MW
Control Pitch and variable speed
Standard operating temperature Range from -20ºC to 45ºC (with de-rating) (1)
Diameter 155 m
Swept area 18,868 m²
Power density 249 W/m2
Length 76 m
Airfoils Siemens Gamesa
Material Fiberglass infusion and carbon pultruded-molded components
Type Multiple technologies available
Height 90, 102.5, 120.5 m and site-specific
Type 3 stages
Type Doubly-fed induction machine
Voltage 690 V AC
Frequency 50 Hz/60 Hz
Protection class IP 54
Power factor 0.9 CAP-0.9 IND throughout the power range (2)
(1) Different versions and optional kits are available to adapt machinery to cold climate, saline or dusty environments.
(2) Power factor at generator output terminals, on low voltage side before transformer input terminals.
Proven Siemens Gamesa technology for onshore wind projects
The Siemens Gamesa 4.X platform leverages the knowledge acquired through the development of our latest onshore wind turbines and integrates innovative technologies to achieve higher efficiency and cost-effectiveness.
Our onshore portfolio relies on proven concepts with extensive track record in the market, such as the combination of a three-stage gearbox (two planetary and one parallel) and a doubly-fed induction generator, which offer the higher levels of reliability.

In addition, the inclusion of an optional premium converter allows us to comply with the most demanding grid connection requirements.
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.
Thanks to OptimaFlex technology, we go beyond the traditional off-the-shelf approach that results in products that are sub-optimal for many sites, and we deliver a uniquely tailored solution that is perfect for our customers’ specific needs. Optimized site design combined with a customizable product platform, based on flexible power rating, site-specific towers and optimized BoP solutions, allow Siemens Gamesa to deliver reduced LCoE by increasing AEP while optimizing cost.
As an aerodynamic blade add-on, DinoTails® Next Generation reduces the sound power levels by using a serrated trailing edge mounted at the blade and adding finer combs in between the teeth. This world-leading noise reduction technology enables us to create value for our customers by maximizing AEP and reducing the LCoE in sites with noise constraints.
The SG 4.7-155 wind turbine incorporates the next generation of Siemens Gamesa blades made of fiberglass infusion and carbon pultruded-molded components, offering a better performance and high flexibility.
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.
Need help?
The solutions we provide are driven by the benefits they deliver. This applies as much to our pursuit of absolute safety as to maximizing your return. Whether by inventing a new technology, evolving an existing product, or simply finding a smarter way of working, we strive to lower costs and raise returns on investments.
Our experts are on hand to help with any questions you have. Email us or login to our customer portal. Here you’ll be able to find out all available documentation about Siemens Gamesa's technological onshore products and solutions.
Operating in around 90 countries, Siemens Gamesa offers an extensive range of onshore wind turbine technologies to cover all wind classes and site conditions. By listening to our customers - and backed up by 40 years of experience - we know just what it takes to develop and manage a successful onshore project.


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