TYPE OS-HM72-525W OS-HM72-535W OS-HM72-550W Max Power 525W 535W 550W Open Circuit Voltage 49.15V 49.45V 49.9V Max Power Voltage 41.15V 41.47V 41.96V Short Circuit Current 13.65A 13.79A 14A Max Power Current 12.76A 12.9A 13.11A Number of Cells 44(6*24) 144(6*24) 144(6*24) Size of Cells (mm) 182*91 182*91 182*91 Dimensions(mm) 2280*1135*35 2280*1135*35 2280*1135*35 Maximum system voltage 1500VDC Junction Box Protection IP67 Cables 4mm2 Connector MC4 Max wind load 2400Pa Max snow load 5400Pa Operating Temperature -40 ~+85 Power Tolerance ±3%