Well, all of my original outlets were sketchy. They needed replacing. 20+ years of turning green inside. And the steel parts rusted.
Dangerous. I used "weatherproof" outlets from HD.
Grady didn't impress me with their AC wiring. They cut the bottom off the boxes to get the wire in. really zero strain relief.
Not sure of your wiring knowledge... Remember AC wiring colors are Black HOT, White NEUTRAL, Green Ground.
You cannot use the Red & Black wire you are used to in 12Vdc.
If someone connects AC black HOT to DC black ground it will not be pretty.
Boat AC wire is stranded. .
You cannot use solid wire that you get at HD.
I did not have to use any new AC wire.
You need to use crimped fork terminals to wire an outlet. You can't wrap stranded wire to an outlet screw.
30A Shore power inlet was all green corrosion too.
IMO if you are going to plug to shore power you should Inspect/replace everything. Update the Galvanic Isolator.
Green corroded AC connections cause heat and start fires.
The Charger on mine has its own breaker on the panel. I assume your does also. Wire runs forward on Port side. Mine ends at a single RV cord outlet near the charger. (When I replaced the charger I cut the hardwired connection and added a single receptacle ) You have a single receptacle or a double receptacle or a GFI receptacle?
So your charger problem can only be the Battery Charger breaker on the panel or the connections between the panel and outlet, or the outlet.