I noticed an interesting nuance. The Bambu Lab P1S printer works from 110V and from 220V sockets. But consumption is very different. And this is beneficial for those who bought American charging stations and use them as UPS.
from the 220V outlet - maximum consumption 1100Wfrom the 110V outlet - maximum consumption 350W
source - off wiki bambulab
That is, EcoFlow River 2 220V will most likely not pull the printer when it heats up and all that.
But the American version of the 110V is yes. I have a 220v downgrader for 110v. So the chain works:printer -> ecoflow 110v <- 220 downlink by 110 -> socket 220.