TIANWEI 230W POLY sharp solar panel 1,25 year-warranty. 2,Certification: IEC,TUV, CE and RoHS 3, With ... ,ToughnessYESEVA resinmm0.5Backsheet(TPT)mm0.3Warranty(Output)10 years%9020 - 25 years%80Whole PanelYears51. With advanced materials and equipments, our modules ... IEC 61215:1993 standards and the product life span of 25 years.2. A film of PECVD is coated on the ...