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Onshore Direct Drive Wind Turbine SWT-DD -142

With the right turbines, low wind sites can become successful energy sources. To guarantee safer investments and higher yields, the SWT-DD-142 builds on a tradition of excellence in onshore Direct Drive with new lighter hybrid carbon blades and our revolutionary OptimaFlex approach to tailor performance precisely to your needs.

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    New blade design coupled with DinoTails® Next Generation serrations offers improved performance and reduced noise.

    69-meter blades feature hybrid carbon technology for greater energy returns. Their low weight is tailored to low-wind sites.

    Direct drive technology enables a simplified component layout and ease of access for technicians.

    Permanent magnet generator expends no energy on excitation - improving overall efficiency.

    Direct Drive generator and SICS controller act as one system and ensure optimal power production.

    Pre-bent tip section reduces peak loads and structural stress.

    Direct Drive generator and SICS controller act as one system and ensure optimal power production.

    Direct Drive generator and SICS controller act as one system and ensure optimal power production.

    Increased blade length for greater returns. 0 meters

    OptimaFlex: performance precisely tailored to your needs

    Low weight hybrid carbon blades optimized for low wind sites

    Are you interested in this product? We look forward to talking with you.

    Product Information

    High performance at low wind

    Capitalizing on every asset assures a sustainable investment. To extract the most energy out of low wind sites for greater returns, the SWT-DD-142 is the ideal choice. By evolving proven technology through new innovations and invaluable experience, every low wind site becomes a successful energy source.

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    Evolving technology for low wind onshore

    Low wind sites don’t have to mean lower return on investment. The new SWT-DD-142 secures your investment by combining new and proven technology for a ground-breaking onshore innovation.


    The SWT-DD-142 is based on the tried and tested technology of the existing Onshore Direct Drive portfolio – using the same proven components and electrical systems assures reliability and performance. The blades of the SWT-DD-142 feature hybrid carbon technology, designed in collaboration with LM Wind Power to produce an unparalleled blade design for targeting low wind sites.


    Other innovations include its direct cooling system for increased performance and reliability, and our new OptimaFlex features a flexible parameter product platform making it even easier to manage local noise emission restrictions.


    And, as with all OptimaFlex turbines, the SWT-DD-142 comes with unprecedented levels of flexibility both now and into the future. The generator and onboard SICS controller can be readjusted over time in response to changes that may occur in the ambient environment, as well as any economic changes that may be on the horizon. This means that even in the lowest of wind conditions you have an investment in which you can feel secure.

    Technical specifications at a glance

    IEC Class IIIA
    Nominal power 3.5 - 3.9 MW
    Rotor diameter 142 m
    Blade length 69.3 m
    Swept area 15,837 m2
    Hub height 99 - 165 m, site specific

    Technology innovations

    Read more about Siemens’ onshore direct drive turbines.
    Download brochure

    Downloads & Support

    Get more information

    Download further product information, contact our experts, and learn more about our service portfolio that meets your needs.

    Customer Support

    Siemens AG
    Freyeslebenstrasse 1
    91058 Erlangen

    (Charges depending on provider)
    (From the German fixed network € 0.14/min. and from the German mobile phone networks max. € 0.42/min.)

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    Wind power training

    Book a safety or technical training in one of our four training centers worldwide, and select from more than 100 different courses.

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    Service wind portfolio

    Comprehensive care throughout the lifetime of your wind turbine. Discover the Siemens service wind portfolio.

    Get an overview of the service portfolio


    Take the next step toward your success

    If you think the SWT-DD-142 is the right turbine for your needs, please contact us. We look forward to talking with you.