Maximum power point tracking (mppt)

Disclosed are methods, systems, and other implementations, including a method that includes measuring a plurality of samples of power produced by a photovoltaic (PV) array over a first interval of time, determining, based on the measured plurality of samples a non-linear predictive model of a behavior of the power produced by the PV array, and performing a first adjustment of the PV array's voltage at a second time instant subsequent to an end of the first interval of time. The method further includes measuring at a third time instant another sample of the power of the PV array with the adjusted voltage, and determining a power difference between the power of the PV array with the adjusted voltage at the third time instant and a computed power level of the PV array at the third time instant determined from the non-linear predictive model.