The base plate that the main unit mounts to, which needs mounted to a building, pole, etc., is only designed to be mounted to a vertical surface, gravity holds the unit onto the plate, but not very well, if you push the power switch on without holding the unit down, it will be pushed upward and fall off the bracket, as I found out quickly. Mounting the solar panel should be easy, right? No, it was designed to be mounted and positioned toward the sun most easily if installed on a surface such as See full review