PowerFilm R15-300 4.5 watt 12 volt Rollable Solar Panel Because PowerFilm integrated solar panels (thin film on plastic) are developed and manufactured with a proprietary roll-to-roll process, by PowerFilm, they are truly rollable unlike other thin film technologies that are only somewhat flexible. PowerFilm solar panels are monolithically integrated which eliminates the need for damage-prone manual connections of individual solar cells. PowerFilm is made of silicon, a natural resource in abundant supply. Also PowerFilm® performs well in diverse enviroments, including hot sun, and does not suffer from wasted over-voltage. Cadmium Free. Operating Voltage (V) Operating Current (Amps) Weight (lbs./kg) Rolled Dimensions (in/mm) Unrolled Dimensions (in/mm) PowerFilm R15-300 15.4 .3 .6 .29 11.5x4x3.75 292x101x92 11.5x21 292x531