... solar product use 3).CE certificate 20 watt solar panel18V, monocrystalline sillicon module, encapsulated with glass, with aluminium frame and junction ... from 1.5W-180w (1.5w, 2.5w, 5w, 10w, 20w, 40w, 50w, 60w, 70W,80w, 85w, 125w,135w, 150w, 165w ... (if necessary)diode and cable. 3). Refer to the material,Monocrystalline solar cell or polycrystalline solar cell,efficiency range 14%-18 ...