Poly-SR156P-240 SR156P-250 SR156P-260 SR156P-270 SR156P-280 Mechanical Characteristics: Solar Cell: Poly-crystalline 156*156mm(6inch) No. Of cells: 72(6*12) Dimensions: 1956*992*50mm(77.0*39.1*2.0inch) Weight: 27KG(59.5lbs) Front Glass: 3.2mm(0.13inch)tempered glass Frame: Anodized aluminium alloy Junction Box: Cixi Renhe PV-RH701(TUV) Temperature Coefficents: Nominal operating Cell Temperature(NOCT) 45+/-2C Temperature Coefficient of Pmax -(0.48+/-0.05)%/C Temperature Coefficient of Voc -(0.34+/-0.01)%/C Temperature Coefficient of lsc -(0.055+/-0.01)%/C