A photovoltaic sun tracking system including a photovoltaic assembly (64), a first mounting structure (60), and a second mounting structure (62). The photovoltaic assembly includes at least one PV cell (54) maintained by framework (58) defining a PV plane. The first and second mounting structures are mounted to a support surface and rotatably maintain the framework at first and second pivot points (160, 162), respectively, to establish a tracking axis passing through the pivot points. The tracking axis is non-parallel with the PV plane. The photovoltaic assembly can be rocked along the tracking axis to follow motion of the sun relative to the earth. One or both of the mounting structures can be relatively small, and the off -parallel tracking axis promotes increased efficiency over the course of a year.