Keystone's pole mounting system is the perfect solution when maximum flexibility is required in the installation. A single, free standing support pole can accommodate 4, 6, 8 or 10 panels. Any number of poles can be installed to grow the system. Poles can be rotated to the optimum orientation, and the system of panels on each pole can be turned to any one of five angles: 10, 20, 30, 40 or 50 degrees to maximise power generation.