A solar tracker system comprising: a tracker apparatus including a plurality of solar modules, each of the solar modules being spatially configured to face in a normal manner in an on sun position in an incident direction of electromagnetic radiation derived from the sun; wherein the solar modules include a plurality of PV strings; and a tracker controller including: a processor; a memory with instructions stored thereon, wherein at least one of: a time of year, a geography, and a plurality of sun positions are stored in the memory; a power supply configured to provide power to the tracker controller; a plurality of power inputs configured to receive a plurality of currents from the plurality of PV strings; a current sensing unit configured to individually monitor the plurality of currents; a DC-DC power converter configured to receive the plurality of power inputs powered from the plurality of PV strings to supply power to the power supply; and a motor controller; wherein the tracker controller is configured to track the sun position based on a prediction from a learning algorithm, wherein tracking the sun position includes: reading the plurality of currents from the plurality of PV strings; and determining, based on the plurality of currents from each PV string, if any portion of the plurality of solar modules are shaded. a tracker apparatus including a plurality of solar modules, each of the solar modules being spatially configured to face in a normal manner in an on sun position in an incident direction of electromagnetic radiation derived from the sun; wherein the solar modules include a plurality of PV strings; and a tracker controller including: a processor; a memory with instructions stored thereon, wherein at least one of: a time of year, a geography, and a plurality of sun positions are stored in the memory; a power supply configured to provide power to the tracker controller; a plurality of power inputs configured to receive a plurality of currents from the plurality of PV strings; a current sensing unit configured to individually monitor the plurality of currents; a DC-DC power converter configured to receive the plurality of power inputs powered from the plurality of PV strings to supply power to the power supply; and a motor controller; a processor; a memory with instructions stored thereon, wherein at least one of: a time of year, a geography, and a plurality of sun positions are stored in the memory; a power supply configured to provide power to the tracker controller; a plurality of power inputs configured to receive a plurality of currents from the plurality of PV strings; a current sensing unit configured to individually monitor the plurality of currents; a DC-DC power converter configured to receive the plurality of power inputs powered from the plurality of PV strings to supply power to the power supply; and a motor controller; wherein the tracker controller is configured to track the sun position based on a prediction from a learning algorithm, reading the plurality of currents from the plurality of PV strings; and determining, based on the plurality of currents from each PV string, if any portion of the plurality of solar modules are shaded.