Specifcation 

Related power: 20W 
Voc: 21.6V 
Vop: 18V 
Short circuit current (Isc): 1.22A 
Working current (Iop): 1.11A 
Output Tolerance: ±3% 
Temperate coefficient of Isc: (010+/- 0.01)%/ ℃ 
Temperate coefficient of Voc: - (0.38 +/-0.01)%/ ℃ 
Temperate coefficient of power Voc: -0.47%/℃ 
Temperature range: -40℃to +85℃ 
Frame: Heavy duty aluminum 
Kind of connection: waterproof junction box, can be customized 
Guarantee of power: 90% within 10 years 80% within 25 years 
Kind of glass and its thickness: Low Iron, high transparency tempered glass of 3.2mm 
SLA Battery Voltage:12V 

Package Included 
1pc 20W Polycrystalline Solar Panel

Size : 520mm x 240mm x 17mm