Good Idea
Chad, Ron has right opinion. This 12 Volt box may be somewhat overkill. You will have to run heavy cables from batteries to battery switch. Depending upon location of this box, this by itself will be quite a chore fishing the heavy 00 cable thru your hull. I placed seperate switch inside battery box. Probably a 12Volt 100 Amp 4-6 toggle panel box will operate the interior cabin equipment you want to power. I have not done this as I have three plug in type 12 volt receptacles and "Y" adapters and this seems adequate to run most TVs, CD player, Fans,lights, light cigarettes, etc, while at anchor. I did install 110Volt 30 amp shorepower to my Mac 26X 1997. Cost me about $2-300.00 I got 110volt shorepower panel box 4 toggle, Plug at end of transom, cable at West Marine. Wiring (#10 3wire) came out of my barn off old RV cord that is weather resistant and duplexes and boxes and other items came from Home Depot. All works great! Oh yes, I also carry a 1000 watt Honda generator for anchoring. Looking at buying Air Conditioner, portable to use in forward hatch. Hope this gives you some ideas. Ray