Where can you buy one (that's less expensive than an active tracker)??
I could probably build one, if I wanted to built and program a micro-controller (with a RTC)
and figure out how to use the pulses from the tracker actuator (mover-motor)
as feedback to 'know' where the array is pointing. I can imagine the calibration process..
As a person that has worked on all kinds of tracking antennas over the last 40
years, I inclined to say, this type of (active) tracker gives you a lot of bang for your bucks.
The less complex a system is, the more likely it is to work longer..
One other thing just occurred to me.. At 6AM, on a day when it's raining and overcast all day.
When T-storms with high winds are passing,
Would I really want my array tracking the
sun (behind the clouds) all day long??
Kind of a waste of battery power. After a few days of rain, my little battery would be flat..
(It relies on it's own little 10w PV to stay alive).