... , 3000W,4500w, 5000w, 7500w, 10kwSeries products have achieved the following certification:1, State Intellectual Property Office patent: patent number: "ZL2004 20044317 ... , Canada CSA, Canada, the U.S. certification: CUS. Certification number: "223, 883."3, EU CE certification issued by SGS, certification number: "GLES0031200483HS".4, EU RoHS ...