NANJING, China: Recently, TUV SUD issued only its third IEC CTF (Customer Testing Facilities Certificate) to Jiangsu Seraphim Solar System Co., Ltd. (“Seraphim”), a world-class solar product manufacturer well-known in the PV industry for strong R&D. To complete CTF qualification, an organization is required to meet strict regulations on personnel structure, environmental facilities, document control, sample management, […]