Abstract: The present invention relates to a solar tracker for capturing solar radiation comprising a support, a rotating shaft, and at least one solar panel. The solar tracker also comprises a tracking system capable of operating the rotating shaft for optimal placement of the solar panel and a blocking system connected to the rotating shaft. The tracking system comprises a control subsystem and an operating subsystem connected to a junction box with a microchip programmed to generate a signal sent by the control system and to send an unblocking command to the blocking system before allowing the operating system to move the rotating shaft. Once the solar panel has reached the optimal position, the blocking system is blocked again.

Abstract: The disclosure relates to a pre-assembly plant for the pre-assembly of units of a solar tracker, wherein said units include a set of photovoltaic panels arranged on a structure formed by a main shaft and a plurality of purlins. Said plant advantageously includes a conveyance line for conveying components of the units, in the proximity of which at least the following pre-assembly sections are arranged: a section equipped with features to receive components of the units, and an unloading area thereof; a fitting section for fitting the purlins to the shafts; an installation section for installing photovoltaic panels on the purlins; and a finishing section for the pre-assembly of the units and for the stockpiling thereof in support structures. The disclosure likewise relates to a pre-assembly method for the pre-assembly of units comprising the use of said plant.