Seems to me that you are referring to a
battery charger being used pretty much just like a converter, so its almost just a matter of semantics.
It is correct that the photo I shared is only the breaker box / fuse panel (AKA Power Distribution Panel).
See this link. It marries with the Progressive Converter. The converter plugs into a standard 120 VAC outlet in the distribution panel and the converter output is wired to the
battery and internal
Scamp wiring so that you can run your 12 VDC stuff off the converter (when on shore power) OR the
battery.
I have
Scamp 16 Layout 4 with larger
fridge and the panel is mounted under the cabinet where the smaller
fridge would normally be. I can't say for sure the location is the same for most Scamps but I suspect it is. The converter is mounted only a foot or so away, in the space under the port side dinette seat. The shore power connection is also here (yes, having it on the starboard side like you do must be a pain!)
One thing I like about this arrangement is that there is a separate AC breaker for the Converter. In the two months or so since I installed
Solar and have been experimenting with it, I don't think I have turned this breaker on at all. (I can get 120 VAC in the trailer when on shore power with the converter still turned off via breaker).
Let me know if you want further info or pics on how
Scamp did my rig.
With shipping cost added, you might be able to get this stuff cheaper somewhere other than Scamp.. its worth comparing prices.
This
Scamp wiring diagram does not clearly show how the current separate converter and panel are wired, but perhaps the rest of it would be of some help.
In this photo the converter is the silver box on the right, next to a PD Energy Management System box.