Operating a photovoltaic array at the peak power point of the array's I-V curve where maximum power is obtained. Also called "peak power tracking".

A system capable of rotating about one axis.

A photovoltaic array that follows the path of the sun to maximize the solar radiation incident on the photovoltaic surface.

The two most common orientations are

1. One axis where the array tracks the sun east to west.
2. Two-axis tracking where the array points directly at the sun at all times.

Tracking arrays use both the direct and diffuse sunlight. Two-axis tracking arrays capture the maximum possible daily energy.

A photovoltaic array tracking system capable of rotating independently about two axes; for example, vertical and horizontal.