Starting with the building of a solar tracker.
The tracker is of Az-El type. Both the Azimuthal and Altitude movements are to be effected using a common satellite dish actuator shown in the photo above. I already own one which will be used for the Azimuthal movement. A small model using wood was prepared and the actuator tested. The movement was nearly 160 degrees, which I think should be adequate for our latitude, to track the sun from east to west.
The second photo is just for perspective so one can have a feel of the size of the actuator.
The photo below is of two bearings to be used on the tracker. The one on the left is a thrust bearing which will carry the full load of the 4x 200 watt panels and mounting hardware. This is estimated to be around 220 kgs. Cost of the bearing was Rs. 700.
The bearing on the right is a support bearing for the 50 mm shaft. It cost Rs. 450.
Also purchased a 50 mm dia steel bar for the shaft of about 15 inches length. Got it at Rs. 89/kg which worked out to Rs. 570.
Tomorrow the machining of the unit starts inshallah. Should take about two days.
Will post pics of completed unit.