1. A solar panel system for determining how many solar panels connected to a controller, comprising;an electrical pathway connecting the controller to a plurality of solar panels;
a first resistance associated with each of the solar panels;
an external environment resistance defined by a cumulative presence of at least the first resistance associated with each of the solar panels, wherein the external environment resistance is different based on a total number of the solar panels connected to the electrical pathway;
a second resistance associated with the controller;
the external environment resistance and the second resistance at least partially define a voltage divider to receive an input voltage from the controller and produce an output voltage;
the controller being programmed to determine from the produced output voltage the total number of the solar panels connected to the controller along the electrical pathway.