PortableSolar Power System 1.Function:computer,TV,etc 2.Benefit:convenient&energy saving 3.Cert.:CE,ROHS 4.Warranty:1 year Portable Solar Power ... of short circuit, overload,overcharging, overdischargingSpecification of 20W portable solar power system: Part NameItemTechnical DataSolar Power ParametersMax Output18V 20W Max Current1.1A ...