CONNECTION DIAGRAM

The EST1 is a single axis light seeking solar tracker control housed in a weatherproof enclosure. When mechanically affixed to a tracking array and connected to its drive motor, it will allow the array to track the unobstructed sun within a degree. The EST1 can be mounted anywhere on the tracking array as long as it receives unobstructed sun. The correct mounting orientation is with the cable end of the box down. The drive motor or linear actuator must have built-in limit switches.

Input voltage range: 10V minimum, 40V maximum.

Maximum motor run current: 5A (it can handle short pulses to 10A).

Supplied cable length (4 x #18): 10 ft.

There are three normal operating modes:

1) Tracking—there’s enough sunlight for the tracker control to operate and it makes a position correction every 1-3 minutes to follow the sun’s position.

2) Pause—there’s not enough sunlight hitting the light sensors to allow tracking so it waits in the last “good” position until the sunlight recovers or it gets dark enough to go into…

3) Park mode—it’s getting kind of dark now and the tracker control is thinking maybe the day is over and it’s time to send the array back to the east limit to wait for the dawn of a new day.

Because this device is housed in a small box, it has thermal limitations. During normal tracking this will usually not be noticed, as corrections are only a few seconds long. On a long motor run to park at a full 5A current draw, it may go into thermal protect mode and start pulsing on/off with at a one second pulse rate until it reaches the east limit.

SCHEMATIC DIAGRAM OF THE INSIDES OF THE EST1

EST1 ENCLOSED SINGLE AXIS TRACKER CONTROL 40V 5A MAXIMUM $82.00