I had some existing brackets that I had printed from Filament Spool Shelf system - V2 - specifically the Main_ID_20_stackable.stl - that I was using and had attached to a wall next to my 3d printer. I recently had some Enphase batteries installed, and made this adapter to be able to mount the bracket to the Enphase battery without modifying the cabinet itself.
The two pieces are held together by 2 M4 bolts and nuts, and the assembly hangs off the front of the cabinet.
I can't imagine there are too many people that have these and a 3d printer, but if you do, it's a slick way to hang a filament rack. At least I think so.
The author marked this model as their own original creation.