Can I mount the panels on any roof, no matter which way it faces?

Facing due north is the ideal orientation, but panels facing more east or west can still provide a high percentage of available power (perhaps 10-15% reduction). The optimum tilt angle of the solar panels is 20-25 degrees which makes standard roof pitches ideal, but if you have a low angle or flat roof we can use adjustable tilt frames to bring the panels up to the ideal angle.