windtest grevenbroich gmbh (wtg) offers you accredited services in the field of Renewable Energy with an experience of more than 25 years. Our vision is to support and advise our customers with a high standard measurement technology and a work that is held to the highest quality and safety standards.

wtg ist accredited according to DIN EN ISO/IEC 17025:2018, announced measuring laboratory according to IECRE and a full member of MEASNET. Moreover since 2010 our Managing Director Ms. Monika Krämer is the Chairwoman of MEASNET. Our experts, beeing part of several expert groups, also participate in worldwide round robins.

We stand for
  • High flexibility
  • Reliability and sustainability
  • Interdisciplinary competence
  • Worldwide measurement and test services
  • Close relations to universities and other scientific institutions
  • Worldwide growing network with synergetic effects

accreditation certificate


Accreditation certificate
(Adobe-PDF, 3,9 MB)



Certificate IEC-RE
(Adobe-PDF, 213 kB)