Standard

Type	Country	Organisation
RETL	United Kingdom	Wood (Clean Energy)
RETL	Germany	WIND-consult Ingenieurgesellschaft für umweltschonende Energiewandlung mbH
RETL	Spain	DNV Maritime and Energy S.L.U.
RETL	United States of America	ArcVera Renewables
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	DNV Energy Systems Germany GmbH
RETL	Germany	UL Solutions
RETL	United States of America	DNV Energy USA, Inc.
RETL	China	Beijing CGC Certification Center Co., Ltd.
RETL	Germany	Windtest Grevenbroich GmbH
RETL	Germany	Deutsche WindGuard Consulting GmbH
RETL	Netherlands	TNO Energy Transition
RETL	Spain	Aresse Engineering S.L.