... -Grade solar panel 2.Japan TPT,Tempered glass,aluminum frame 3.MC4, waterproof junction box 4.CE,UL,TUV 5.PWM controller ... panel consists of :2pcs of 20w solar panel, 1pc of waterproof solar charge controller,charging connectors etc.20W Solar Panel, 20W ... Customized Solar Panel 20W/40W Folding Solar Panel with PWM waterproof controller(40W*2PCS)