I am doing a similar thing but for a Mac Studio running Asahi Linux (13 W idle, 215 W max), since DC/DC was not an option I am using https://www.amazon.com/CAT-Professional-Station-Starter-Comp... (200W max) which was half price at Costco. A power adapter that can also inflate tiers and jumpstart other veihicles.

Would anyone know if I can charge it while the computer is plugged? I usually assume that is a no / no, but if I were to try, could something explode?