Wayyyyyy back when yes.
Also maybe FlexiCharger USB-PD, concept stage person who knows.
@Battery_Mooch I must ask if you would foresee any huge issues with just wiring up a DC DC booster to your charge port inside the enclosure and leaving it. Then you can use a normal 12S 6A charger or also could use a USB C → 20V DC jack possibly. I just feel like there must be a real good reason I have never seen this tried.