Global Wind Energy Services - All-in-One Service Provider

Combining technical expertise with many years of in-depth industry experience, DEWI (UL International GmbH) offers global, one-stop wind energy services to turbine manufacturers, component manufacturers, project developers, utilities and other companies within the sector. UL/DEWI Group currently operates two wind test sites in Wilhelmshaven, Germany and at the West Texas AM University, USA.

DEWI belongs to the UL family of companies. 

DEWI UL (Underwriters Laboratories) National & International Committees DEWI Accreditations Quality Agreements

DEWI (UL International GmbH) is one of the leading international performance, measurement, efficiency, research and education providers in the field of wind energy for 25 years.

UL (Underwriters Laboratories) is a premier global independent safety and performance science company, with 120 years of history.

National & International Committees

The DEWI Group is recognised by national and international committees as a key participant in defining wind energy standards, such as:

  • IEC – International Electrotechnical Commission
  • IEA – International Energy Agency
  • CENELEC – Comité Européen de Normalisation Électrotechnique
  • DKE – Deutsche Kommission Elektrotechnik Elektronik-Informationstechnik in DIN und VDE
  • Technical Guidelines for Wind Turbines (guidelines published by FGW, Germany)

Quality Agreements

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DEWI Accreditation

(Wilhelmshaven & Oldenburg)
The accreditations are valid for the DEWI locations, test and calibration procedures mentioned in the certificates. The certificates are available on request or at Opens external link in new
UL International GmbH – Sucursal en España is accredited by IAS (under AA-759) according to ISO/IEC 17020:2012 as„Inspection Agency - Type A (Third-Party) Inspection Body“.