I upgraded my 2001 Mirada converter (7345) with a new 4 stage converter.
Two benefits of the multistage -
1) When I apply shore power (or generator) the converter kicks into high gear and charges the battery fast. We recently did this when we were camped out in the desert for a few days near Buckeye AZ
2) When I'm plugged into shore power for a long time, the converter kicks into low gear and doesn't boil the battery.
Upgrading converter to 4 stage | 2001 Coachmen Mirada 300QB