... TUV,UL,MCS,CE,CEC,ISO 235W Poly Panel,A Grade,High Efficiency, TUV,MCS,UL,CE,CEC,ISO ... with convenient mounting-access, for high wind-press and snow-load6. the backside frames are equipped with drainage holes ... , so we eliminate the risk that rain or snow water may accumulate in the frame lumen and freeze ... : 29.6 V optimal operating current: 7.82 A open circuit voltage: 36.71 V short circuit current ...