Maximum power (watt): 180 W Production tolerance: +3% /-3% Maximum power voltage: 35 V Maximum power current: 5.14 A Open circuit voltage: 42.5 V Short circuit current: 6.10 A Size of module (wide and high): 1500*990*46MM Frame(type, material and thickness) Anodized Alum. Alloy 46mm thickness Number of cells: 72pcs Size of cells(wide and high): 156*156mm Weight per piece: 19.5 KG By pass Schottky diode(3pcs): 10A Type of junction box: TUV certified junction box Certificates: CE, ROHS Cable type and length, connector type: 4c TUV certified cable 1m long Multi contact connector Maximum system voltage: 1000V Temperature coefficient of Isc: ±0.05% Temperature coefficient of Voc: -0.33% Temperature coefficient of power: -0.5% Temperature coefficient of Imp: +0.08% Temperature coefficient of Vm: -0.33% NOCT(nominal operating cell temperature): 45(±) Voltage standoff: AC2000V, DC 3000V Wind bearing: 60m/s(200kg/sq.m) Impact resistance hail impact test: 227g steel ball fall down from 1m height Encapsulated with toughened glass Low iron tempered glass with thickness of 3.2mm,light transmittance above91% Superstrate in front: Hi-sheet RC 02B (0.45mm thick)/Japan Backside foil: PTL3-38/75(0.17mm thick),Krempel/Germany Conversion efficiency Cell conversion efficiency: 15% Quality guarantee: 2 years product warranty,10years 90% and 25years 80% of the power