The PT15-75 from PowerFilm Solar is a Solar Panel that consists of 4 cells. This solar panel delivers an output power of 173-770 mW and requires a DC voltage of 15.4 V for operation. It provides an output current of 11.3-50 mA. This solar panel has a rugged construction that includes a UV-stabilized surface, an extra edge seal for weather protection, and tin-coated Copper leads that extend from the panel.  It measures 283 x 99 mm and is ideal for permanent outdoor applications.