MPPT stands for Maximum Power Point Tracking, which is an algorithm included in solar charge controllers used for extracting maximum available power from a solar panel or array. The MPPT charge controller is a DC-to-DC converter that optimizes the match between the solar array and the battery. It receives voltage from the solar panels and converts it to charge the battery at a more appropriate level, which helps avoid losing some energy the system captures and generates, maximizing what can be stored and used. The MPPT identifies the point at which the system gets maximum efficiency, which varies depending on numerous factors such as the time of day, cloud cover, and temperature of the panels. The MPPT controller adjusts to environmental changes and helps the system maintain the best possible output. The MPPT operates at very high audio frequencies, usually in the 20-80 kHz range, and varies the ratio between the voltage and current delivered to the battery to deliver maximum power. The MPPT charge controller is one of two primary kinds of charge controllers on the market, the other being a pulse width modulation (PWM) charge controller. The MPPT controller yields numerous benefits that help save money and recoup the initial investment in a solar power system more quickly, such as increased energy harvest, fewer panels needed, and support for oversized arrays that would otherwise exceed the maximum operating power limits of the charge controller.