Model OS-M60-250 OS-M60-270 OS-M60-280 Cell MONO MONO MONO Max Power 250W 270W 280W Max Power Voltage 30.5V 31.5V 31.5V Max Power Current 8.20A 8.57A 8.89A Open Circuit Voltage 36V 38.05V 38.86V Short Circuit Current 9.02A 9.08A 9.22A Number of Cells 60(6*10) 60(6*10) 60(6*10ï¼? Size of Cells (mm) 156*156 Dimensions(mm)1640*992*35 Maximum system voltage1000VDC Junction Box Protection IP67 Cables 4mm2 Connector MC4 Max wind load 2400Pa Max snow load 5400Pa Operating Temperature -40~+85 Power Tolerance ±3%