... System,Portable Solar System,DC Solar System1.Constructed by amorphous silicon solar module, bracket, power control unit and loading unit (DC energy ... no electricity or unreliable electricity supply.2.System Configuration: Solar module: 1 piece Power 20W, output voltage≥18V, Maximum output ... saving lamp: 1pc of 20W/18V3.System Usage: Solar module should be placed outdoor where no sun light is blocked ...