Standard

Type	Country	Organisation
RETL	Germany	Deutsche WindGuard Consulting GmbH
RETL	Germany	WIND-consult Ingenieurgesellschaft für umweltschonende Energiewandlung mbH
RETL	Germany	UL Solutions
RETL	China	Beijing CGC Certification Center Co., Ltd.
RETL	Spain	DNV Maritime and Energy S.L.U.
RETL	United Kingdom	Wood (Clean Energy)
RETL	Spain	Barlovento Recursos Naturales S.L. (BARLOVENTO APPLUS+)
RETL	Denmark	“Wind Turbine Test”, Test and Calibration (TAC), DTU Wind and Energy Systems, Technical University of Denmark
RETL	Germany	Windtest Grevenbroich GmbH