The invention relates to a solar tracker including a structure formed by a plurality of rigid frames consisting of pairs of pillars (1 and 2) connected by braces (4) and connected collaterally by braces forming Saint Andrew's crosses (5), such that the frames, which are anchored to the ground using stakes (3), form the mounting base for a corresponding solar-panel-supporting grate (6) which is mounted such that it can swivel from side to side and be oriented according to the direction of the sun's rays. The frames and grates form rows made up of groups, whereby the panels of each group are connected to a tubular element forming a connecting rod (13) that is actuated by a power unit in order to transmit either a linear movement converted to a swivel movement or a swivel movement directly to the grates (6) so as to orient same correctly. The movement transmission system is based on a triangular supporting frame (9) which is mounted on the grates (6) and receives the linear or oscillating movement from the connecting rod (13).
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