ConverterTec (previously Woodward Renewable Power Systems) is a manufacturer of converters and electronic components for the wind power industry and a supplier of spare parts and service (Aftermarket & Service segment). ConverterTec has its origins in the company SEG, which was founded in 1969. It belonged to the U.S. Woodward company from 2006 to 2020. The company is based in Kempen, Germany. ConverterTec also operates a production and development site in Krakow, Poland, and a development site in Sofa, Bulgaria. The Aftermarket & Service Division is managed from the Kempen site and is staﬀed by employees from Kempen, Sofa, and the four service centers in the United States, Brazil, Japan and India.