... 1)High module conversion efficiency 2)10 years on quality and 25 years on output power 3)TUV,UL ... ,MCS,CE,CEC,ISO 235W Poly Panel,A Grade,High Efficiency, TUV,MCS,UL, ... CE,CEC,ISO Certified characteristics:1. high-efficient and stable2. ... aluminum frames with convenient mounting-access, for high wind-press and snow-load6. the backside frames ...