Hopefully, simple operation ? On D.C. Power.

[Ron Chamber]

FR3 30DS 2013.

IF plugged into shore power, and I flipped OFF the cabin batteries swt by the door, Would I still have D.C. Volts in the cabin from the shore power inverter?
Or would killing off the batteries shut off the D.C. In the cabin?

[SeaDog]

Your converter should still supply 12V power.

[Ron Chamber]

So, hooked up to external power, and the cabin batteries disconnected, I should still have D.C. Lights!
Great, was not sure which way that worked!
Now curiosity is answered!