A solar array comprising a plurality of solar modules distributed in several parallel rows , each solar module comprising at least one solar collector , in particular of the photovoltaic panel type, carried by a single-axis solar tracker , wherein each solar tracker is piloted in rotation about a main axis (A) by means of an actuator for a rotation of the solar module allowing tracking the Sun during its rise and set from east to west, said solar array further comprising a piloting unit of the angular orientation of the solar modules , said piloting unit being linked to the actuators to servo-control the angular orientation of the solar modules by applying a common orientation setpoint (COC) to all solar modules , said solar array being characterized in that it comprises a reference solar power plant comprising at least two reference solar modules (20(i)), including a central reference solar module (20 ) and at least one secondary reference solar module (20(j)), wherein the piloting unit is adapted for: - piloting the angular orientation of the central reference solar module (20 ) according to a reference orientation setpoint called central reference orientation setpoint (COR ) corresponding to an initial orientation setpoint (COI), - piloting the orientation of the or each secondary reference solar module (20(j)) according to a reference orientation setpoint called secondary reference orientation setpoint (COR(j)), said secondary reference orientation setpoint (COR(j)) corresponding to the initial orientation setpoint (COI) shifted by a predefined non-zero angle called offset angle (OFF(j)) associated to said secondary reference solar module (20(j)), the central reference solar module (20 ) being accordingly associated to a zero offset angle (OFF ); - receiving a solar energy production value (P(i)) from each reference solar module (20(i)); - piloting the angular orientation of the solar modules , except for the reference solar modules (20(i)), by applying as a common orientation setpoint (COC) the reference orientation setpoint (COR(i), COR , COR(j)) associated to the reference solar module (20(i)) having the highest solar energy production value (P(i)). - piloting the angular orientation of the central reference solar module (20 ) according to a reference orientation setpoint called central reference orientation setpoint (COR ) corresponding to an initial orientation setpoint (COI), - piloting the orientation of the or each secondary reference solar module (20(j)) according to a reference orientation setpoint called secondary reference orientation setpoint (COR(j)), said secondary reference orientation setpoint (COR(j)) corresponding to the initial orientation setpoint (COI) shifted by a predefined non-zero angle called offset angle (OFF(j)) associated to said secondary reference solar module (20(j)), the central reference solar module (20 ) being accordingly associated to a zero offset angle (OFF ); - receiving a solar energy production value (P(i)) from each reference solar module (20(i)); - piloting the angular orientation of the solar modules , except for the reference solar modules (20(i)), by applying as a common orientation setpoint (COC) the reference orientation setpoint (COR(i), COR , COR(j)) associated to the reference solar module (20(i)) having the highest solar energy production value (P(i)). <EOS>