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MPPT stands for Maximum Power Point Tracking, and it’s commonly used to describe a specific type of solar controller or regulator. Essentially, MPPT solar controllers are equipped with a small computer that continuously monitors the output of a solar panel. They then compare this output to the battery’s voltage and calculate the optimal combination of Amps and Volts to maximize power input into the battery. These controllers are particularly useful in less-than-ideal conditions, such as cloudy weather or when the sun is low on the horizon. Depending on the installation and light conditions, an MPPT controller can increase the current flowing into a battery by up to 30% compared to a standard controller.

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