Characteristics STP280-24b-1Open Circuit Voltage (Voc): 44.8 voltsOptimum Operating Voltage (Vmp): 35.2 voltsShort Circuit Current (Isc): 8.33 ampsOptimum Operating Current (Imp): 7.95 ampsMaximum Power at STC (Pmax): 280 wattsOperating Temperature: -40°C to 85°CMaximum System Voltage: 600 VDCMaximum Series Fuse Rating: 20 ampsPower Tolerance: ±3%STC Irradiance 1000W/m2, Module temperature 25°C, AM=1.5Mechanical CharacteristicsSolar Cell: Poly-crystalline 6" (156 x 156mm)Number of Cells: 72 (6x12)Dimension of module: 77.0" x 39.1" x 2.0" (1956 x 992 x 50 mm)Weight: 59.5 lbs. (27.0 kg)Front Glass: 0.16" (4 mm) tempered glassFrame: Anodized aluminum alloyJunction Box: IP65 ratedOutput Cables: AIW (12AWG), asymmetrical lengths (-) 47.2" (1200 mm) and (+) 31.5" (800 mm), MC Plug Type IV connectorsTemperature CoefficientsNominal Operating Cell Temperature (NOCT) 45±2°CTemperature Coefficient of Pmax: -(0.47±0.05)%/°CTemperature Coefficient of Voc: -(0.34±0.01)%/°CTemperature