NOVELTY - The method involves generating photovoltaic array output current-voltage characteristics curve to scan voltage range (S1). Local maximum power point voltage, current and power values are recorded (S2). A scanning step length value is subtracted from the local maximum power point voltage value to obtain a voltage value corresponding to current reference point. The reference point is recorded (S3). Scanning direction is determined according to current turning point to calculate current point (S4). Maximum local maximum power point is obtained as photovoltaic array maximum power point (S11).    USE - Photovoltaic array maximum power point tracking and scanning method.    ADVANTAGE - The method enables reducing energy consumption rate when scanning voltage range is lower than maximum power point, and determining the scanning voltage range and the local maximum power point voltage value so as to determine current reference point and the current turning point. The method enables comparing the current reference point and the current turning point so as to determine whether the scanned current reference point exceeds scanning voltage range according to determined reference point voltage value.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a photovoltaic array maximum power point tracking and scanning system.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating a photovoltaic array maximum power point tracking and scanning method.'(Drawing includes non-English language text)'    Step for generating photovoltaic array output current-voltage characteristics curve to scan voltage range (S1)    Step for recording local maximum power point voltage, current and power values (S2)    Step for recording the current reference point (S3)    Step for determining scanning direction according to current turning point to calculate current point (S4)    Step for obtaining maximum local maximum power point as photovoltaic array maximum power point (S11)