NOVELTY - The sun-tracking photovoltaic solar collector array (11) includes at least one bearing (20) supporting the pivot such as torque tube (16) so as to be pivotable about the pivot axis, with the pivot having outer surface and supporting photovoltaic modules (12). At least one pier supports the bearing at position above the support surface, with the bearing having at least one reduced friction member in which partially toroidal inner surface is positioned to slide against the outer surface of the pivot when the pivot pivots about the pivot axis.    USE - Sun-tracking photovoltaic solar collector array of solar energy system.    ADVANTAGE - Reduces manufacturing cost by minimizing the raw material configuration of the solar system components. Enable use of channel-shaped structural steel in the solar energy collection system to provide improved balance against the inherent torsional loading of the channel caused by the perpendicular load aligned with the web of the channel by providing mounting surface offset from the plane of the web of the channel so as to reduce or eliminate the reactionary torsional loading. Bearing is provided with having at least one reduced friction member in which partially toroidal inner surface is positioned to slide against the outer surface of the pivot when the pivot pivots about the pivot axis, and reduced friction member is formed less robust, and thus less costly, without excessively compromising the performance of the solar collector system. Upper bearing member is formed with fiber reinforced composite material having reduced friction matrix to allow the upper bearing member to have simplified construction, integrating both structural strength and reduced friction, to reduce the manufacture and construction of the solar collector system.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic top plan view of the solar collector system.    Solar collector system (10)    Photovoltaic modules (12)    Solar collecting device (14)    Torque tube (16)    Bearing (20)