I dont know- out put of old converter went thru battery- if battery not wired, on shore with disconnect switch not engaged (either position) there was no 12v at fuse panel. My assumption (to assume is to error) was all output of new converter still went thru battery, never checked with battery not connected.
Edit:
I'll be dipped. Removed, isolated both battery positive leads, plugged in camper-
everything works, 13.5+ volts. Battery disconnect has no effect (Thinking out put of converter might go thru switch). Turning off converter 12v fades away. Though I dont think I would use converter to supply high loads directly- its possible to have 12v if battery dumps(and removed). Now I'm curious why and how the old converter behaved as it did- no changes were made to wiring.
Which makes me wonder about OPs converter and no 12v?