Yes, first came onto the market about 6 years ago.
Output depends on the PV type and up-to-date manufacturing specs with the cells but at the time we reckoned only about max 2.5kW.
We here had developed, in 2012, this 8 panel solar tracker that had just survived Hurricane force winds, and material cost for the Solar tracker was about £800 then the PV panel price.
We kept the design simple, and minimal but strong, very much to Hugh Piggotts concepts. All three are still up and working and using the US guys, Redrock, simple little sun follower circuit that uses LED's.
However, i now recommend that any form of PV Solar Tracker is just no longer financial viable, ie, its Cost Effectiveness. As its still moving about and even simple maintenance can become a pain. Yea, you get about 1/3rd more produced PV power, but hell modern new PV panels are at about £110 for a 360w panel.
So I recommend just increasing your PV Static array by a 1/3rd more panels. And a Static array has no moving parts and minimal materials in its simple structure. Just ensure that the Static array is at least 1.2m above ground level so that sheep can still graze the underneath, then the land around and under the static array is still productive, and not weed killer and sterile gravel/concrete etc.
And my sheep doing their stuff amongst the trackers.