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Years ago my mate in Adelaide built a tracker from a couple of car windscreen wiper motors, some light sensitive switch gear and a bits and pieces.
It was pretty primative but it worked most times but occasionally it didnt switch the solonoid that reset it back to East at night.
Due to the cost of pro tracking gear and the price of panels (about 0.50c per watt), its more cost effective to get more panels to make up for losses from early morning and late afternoon.
Plus a lot less to go wrong.
Cheers
Andy
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