With my very simple Mini Solar Panel creation; https://powdertoy.co.uk/Browse/View.html?ID=1587655
I wonder how that got on there; it's nowhere near the calibre of the other saves that got me FP. It functions very very simply with BZRS. Because BIZR plus PHOT equals ELEC, and there is space for said electrons to hit titanium.
Also, there's still my Electron Microscope, it's cool.
Weird..... I could have sworn I saw that same design a couple years ago.
You did post one april 2013, that might be it.