An elevated trellis style long span solar panel mounting system with a deployable truss structure underneath that allows the solar array to be positioned at a height to eliminate or minimize shading from roof structures or mounted equipment that employs a force cancelling truss configuration to minimize side loads and the resulting bending loads on the roof support system to which it is attached, thereby eliminating the need for cross-bracing between mounting posts which limits roof access for re-roofing without solar system removal, and provides a means for adjusting the tilt angle, height, and mounting post spacing by sliding truss members to the appropriate positions.