Solar panel

Maximum power (watt): 20W 
Production tolerance: +3% /-3%
Maximum power voltage: 17.5V 
Maximum power current: 1.14A
Size of module (wide and high): 530*350*28MM
Frame(type, material and thickness) Anodized Alum. Alloy 28mm thickness
Number of cells: 36pcs
Size of cells(wide and high): 156*156mm
Weight per piece: 2.5KG
Type of junction box: TUV certified junction box
Certificates: CE, ROHS
Cable type and length, connector type: Multi contact connector(compatible to MC type IV)
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(±)
Insulation: 100MOhm
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: 2years product warranty,10years 90% and 25years 80% of the power