Comprises: supports (2), to support the tracker on the support surface (3); columns (4) supported on the supports (2); rotary connections (5), mounted on the columns (4), and connected to photovoltaic panels (1) to provide the panels (1) with coaxial tracking rotation, wherein each rotary connection (5) supports, and transmits the rotation to, two adjoining panels (1) located one on each side of the corresponding column (4); motor (9), associated with a column (4); longitudinal transmission element (10), arranged through the columns (4), parallel to the coaxial rotation, and configured to receive rotation from the motor (9) in the longitudinal direction; toothed wheel (11) coaxially fixed to the rotary connection (5) of the columns (4); and pinions (12) mounted on the longitudinal transmission element (10), to mesh with the toothed wheels (11). It enables the torque tube or similar to be dispensed with.