NOVELTY - The method (300) involves measuring (310) multiple samples of power produced by a photovoltaic (PV) array over an interval of time. A non-linear predictive model of a behavior of the power is determined (320). An adjustment of the PV array voltage is performed (330) at another time instant subsequent to an end of the former interval of time. Another sample of the power of the PV array with the adjusted voltage is measured (340) at a third time instant. A power difference is determined (350) between the power of the PV array and a computed power level of the PV array at the third time instant.    USE - Method for power tracking.    ADVANTAGE - The power difference is determined between the power of the photovoltaic array and a computed power level of the photovoltaic array at the third time instant which ensures that the efficient realization of maximum power point determination is effectively achieved in rapidly changing insolation conditions, such as environmental and efficient harvesting of power from the photovoltaic array is enabled. The photovoltaic array efficiently supplies power to the load without any loss of power.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a system for maximum power point tracking comprises multiple photovoltaic arrays.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of a power tracking procedure that takes into account the effect of insolation changes on the power tracking functionality.    Power tracking method (300)    Measuring multiple samples of power produced by a photovoltaic array over an interval of time (310)    Determining non-linear predictive model of a behavior of the power (320)    Performing adjustment of the photovoltaic array voltage at another time instant (330)    Measuring another sample of the power of the photovoltaic array with the adjusted voltage at a third time instant (340)    Determining power difference between the power of the photovoltaic array and a computed power level of the photovoltaic array at the third time instant (350)