There is (was?) a company that made terra cotta tile shaped concentrators that were laid on top of solar panels. They claimed this used something like 30% less PV panels for the same output, and that, because the panels were shielded from UV / precipitation, increased the usable lifespan by a decade or so.

I think they went under back when Tesla was false-advertising their roof prices to suppress competition in the market, but I’d love to be proven wrong.