Remember, except in rare exceptions TOH gets paid to show new products and many of the tools. Its basically one long commercial. TOH is long gone before any issues crop up once the wrap party occurs. They were sued in the past for high end equipment that was not working when they left but reported they tightened up on the non disclosure agreement that the homeowner signs so the homeowner cant sue or publicize issues.
Home size trackers rarely if ever make sense given the cheap price of PV panels. Far better to install more panels. The owner of All Earth allegedly "ghost wrote" the Vermont incentive package that paid extra for VT made trackers and then came out with tracker to sell
https://www.allearthrenewables.com/ so they are real popular in VT. I see them pop up elsewhere in ME and NH but in most cases the owners were sold them and didn't realize the economics. They are quite robust. Note there are some utility size arrays with single axis trackers that are shown to break even but only in specific markets.
Somewhat like small wind turbines, the hope is the equipment is attractive as odds are it becomes a piece of sculpture rather than an actual functioning piece of equipment once the expensive bits break. Unlike a wind turbine, someone will probably figure out how to bolt the leaves in place and lock the rotation when the moving parts fail. Of course the design may have intended to stow in heavy wind conditions so leaving them deployed in heavy wind may eventually mean failure of the supporting structure. The All Earths go flat when the built in anemometer detects high winds and go vertical if covered with snow.
