Re: Refrigerator off main breaker?
This is DC so a main breaker is not needed - the house bank main fuse takes care of that before feeding the DC panel. It is common to have a few "always on" circuits, bilge pump for one and the refrigeration can also be one. These are best fed from a sub panel that is not main switch dependent. A small panel or a fuse block works well. The feed wire to this panel or fuse block should be appropriately fused for the wire size leading to it. If desired a switch can be installed in this wire so total isolation is possible.
Living aboard in Victoria Harbour