In the 5er with the 13.5 ft slide, no trouble running it on the 55 amp converter alone, no battery. Just had to connect the two red wires that normally met on the pos battery post with vise grip pliers to make a positive path from converter to slide motor.
Lippert specified a 30a fuse for that motor. On Trimetric coming in, it showed 25 amps at most coming up over the hump at the edge of the main floor, dropping off in amps once it got level with the main floor.
No clue though, how it all works with three slides at once.