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Single Axis Trackers have one degree that allows for an axis of rotation. Particularly, these trackers are aligned with the axis of the North meridian. There are several implementations of the Single Axis Trackers:

Vertical Single Axis Tracker (VSAT)

This is when the axis of rotation is vertical to the ground. These particular trackers rotate from East to West over the span of the day. At higher latitudes, vertical single axis trackers are more effective than horizontal single axis trackers.

Shading must be taken into consideration in order to avoid energy loss and in order to utilize the land. The face of the module is typically oriented at the angle with respect to the axis of rotation .

vertical single axis

Horizontal Single Axis Tracker (HSAT)

This is when the axis of rotation is horizontal to the ground. Posts at either end of the axis of rotation can be shared between trackers to help lower the cost of installation. Horizontal trackers usually have the face of the module oriented parallel to the axis of rotation.

A long horizontal tube is supported on bearings that are mounted with frames or pylons. Panels are mounted on the tube, where the tube's axis is placed on a north-south line.

horizontal single axis

Polar Aligned Single Axis Tracker (PASAT)

This type of tracker is aligned to the polar star. The tilt angle is equal to the latitude of the installation, allowing it to align with the Earth's axis of rotation.

Tilted Single Axis Tracker (TSAT)

These are those trackers that have an axes of rotation between vertical and horizontal. Shading must also be considered to avoid unnecessary losses and to utilize the land.

The face of the module is typically oriented parallel to the axis of rotation.