I use a Tripp Lite 12U rack mounted to my wall. It’s rock solid and great build quality. Check a previous post of mine if you wanna see the setup. I don’t have many reddit posts so it’ll be easy to find.
Tripp Lite 12U Wall Mount Rack... https://www.amazon.com/dp/B01AWB37T2?ref=ppx_pop_mob_ap_share
Also, I did find this rack that should work I think, and will fit a full size UPS. Thoughts?Tripp Lite 12U Wall Mount Rack Enclosure Server Cabinet, Hinged Back, 24.5 in. Deep, UPS-Depth (SRW12USDP) https://www.amazon.com/dp/B01AWB37T2/ref=cm_sw_r_cp_apa_i_eUhXCbM7Z36QD