Single Double Axis Tracking Controller Solar Tracker Sun Tracking System Automatically Manual Switch Vertical Towards Sun (A Single axis)

I'm surprised that this is the first review since I rarely buy anything without reviews. I bought this single axis solar tracking controller a year ago. I needed to replace my previous controller since I changed the motor drive for my solar array. installation was straight forward and worked like a charm. I have a shadow post so I can easily watch how accurate the tracking is. I noticed that even when light clouds prevented a shadow it would track very closely until I could see a shadow. None of my previous controllers worked so well. Unfortunately, just before a year of operation was up, the reverse function failed - both automatic and manual. I guess my planned obsolescence clock ran out.UPDATE:Bought another and went backwards. The new one is missing a daughter board that may be why the new one does NOT return to east at sunset or why it is not as accurate as the first one. Time to cut return this one.