by John61CT » Fri Jan 24, 2020 3:17 pm
Of course it isn't the "plug on the side" that charges your deep cycle bank. That would be a shore charger, and there are hundreds of different kinds, most of which suck.
What does the other bit on the inside actually go to?
Solar panel wiring will get routed through another point in the skin, usually via a waterproof "clam" in the roof.
These go to a solar controller located close to the storage bank, and no problem keeping that hooked up and going while the shore power charger is also active.
Many setups are designed around staying at powered campsites, so a fuse panel and some distribution box where mains devices just plug in like at home.
To run that stuff off grid requires one or more inverters, which is much less energy efficient compared to using native-DC load devices, avoiding inverter usage as much as possible.
The simplest scheme is, only the mains charger plugs into shore power, all AC devices get powered off the inverter(s) only.
Otherwise you need expensive switching and safe ground management to absolutely ensure only one AC source feeds any given circuit at a time, and only one connection to true Earth Ground, best to get a pro to deal with that IMO.
Hope that helps
safe