Vestas & Siemens Launch New Wind Turbines for Offshore Applications

This week, at the European Offshore Wind Conference in Stockholm, Sweden, Vestas and Siemens unveiled new turbines for the offshore market.


Siemens has released a 3.6-megawatt (MW) wind turbine featuring a 120 meter rotor diameter. The SWT-3.6-120 turbine is based on the proven technology of the SWT-3.6-107 – one of the world’s most popular offshore wind turbines. The new machine will be equipped with 58.5 meter long rotor blades. The turbine has a swept area of 11 300 square meters, which is equivalent to nearly two football fields.

“We anticipate that our new SWT-3.6-120 wind turbine will generate roughly ten per cent more electricity at a typical offshore site compared to our SWT-3.6-107,” said Andreas Nauen, CEO of the Siemens Wind Power Business Unit. “With this new wind turbine we will continue to maintain our technology leadership in offshore wind power. We have already seen a lot of interest from the market in this new product.”

The SWT-3.6-120 extends the performance of the proven Siemens 3.6 MW turbine type, which is already established as the preferred offshore turbine type in the multi-megawatt class. Siemens has installed 100 of its 3.6 MW wind turbines and has another 700 turbines on order.

Earlier this year Dong Energy signed orders for more than 450 SWT-3.6-120 machines. 175 of these new wind turbines will be installed in the first phase of the British London Array project, which will ultimately be the world’s first offshore wind farm on a gigawatt-scale.

Furthermore, 51 SWT-3.6-120 wind turbines will be installed at the Walney II Offshore Wind Farm, also in the U.K. These orders from Dong Energy are part of the world’s largest wind power agreement for the supply of up to 500 offshore wind turbines, which was signed earlier this year. The wind turbines to be delivered under the supply agreement will have a total capacity of up to 1800 MW.

The first two prototypes of the SWT 3.6-120 will be used by Dong Energy at Avedøre in Copenhagen, and installed in time for the COP 15 / UN World Climate Summit in Copenhagen. The Hvidovre Vindmøllelaug, a group of local investors, is contributing to this project.


The Vestas V112-3 MW offshore model is optimized for the conditions at sea, the company said. The company also said that the new turbine can generate more power than any other turbine in the 3 MW class.

The turbine features an extended production envelope, and delivers optimal output in average wind speeds up to 9.5 m/s. The V112-3.0 MW will be class individually IECS certified for each separate offshore project.

Marketing of the V112-3.0 MW Offshore has started, and the first turbines will be installed in late 2010 with serial delivery in 2011.

“This is a milestone for Vestas. The launch of yet another turbine for the offshore market underlines our commitment to remain a strong and leading player in the offshore industry. Vestas is fully dedicated to keep servicing our offshore customers and to provide them with the best possible business case certainty. The V112-3.0 MW Offshore is one more step towards Vestas becoming even more competitive in the offshore market, and we do not intend to stop here. We are in the offshore market for the long run, and we will therefore have even more to reveal in this respect within the coming months,” said Anders Søe-Jensen, president of Vestas Offshore.

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