Battery Charger recommendation

Wouldn't this be where a charge divider would solve the problem?

charge divider ??

Sorry Ralph, probably a nomenclature error on my part but modern PMS (power management systems) have PLC dividers with sensing taps that constantly sample the alternating current on the switchboard buss for voltage set points and when these points are violated for low AC voltage or complete loss (dead ship) of AC on the buss the PLC divider opens a gate to allow the engine mounted alternators to take over the DC charging system from the AC powered chargers with priority for emergency Navigation and communications batteries as these systems are autonomous and the house (hotel) and starting batteries would have secondary priority until manually overridden or AC is back on the main buss.

Sounds like a smart (programmable) charge controller. I don't think many small ships or chargers will have any equipment like this installed. The 20M+ Hats I've worked with have fancy stuff but still nothing like that from the factory. I do like the idea of the charger becoming an emergency power supply.
I remember reading in the Victron and Maybe the MasterVolt equipment manuals, some chargers could be used for power supply in various configs, I didn't think much would be automatic. I'll have to go back and re-read some stuff now.

Oh, on my #19 post above, Hall overhead lights are DCv. Blinks were very noticeable away from windows and ACv lights. Exit path lights should always be DCv. Even on a UPS or emergency power supply.
Hum, retirement project maybe.. Cost reduced emergency path lighting for smaller yachts.