Well, my battery died this winter, so that means it's time to pull the trigger on the multi-bank expansion. I'm hoping you can help verify that my assumptions in this wiring diagram are correct. Due to space and cost requirements, I'll be using a flooded group 34 as a starting battery and 2 flooded group 27's (total of appx 170 aH) as my house bank (not Optima's as shown). I want to be able to utilize a SurePower 1314 while operating the boat but I also want to be able to charge the batteries with a multi-bank smart charger when I put the boat away, which is why I included the BlueSea switch. Also, the blue numbers represent wire gauge if that wasn't obvious.
Let me know what you think...as far as safety, functionality, and practicality go. I studied Mikeski's schematic for his boat, so this diagram is loosely modeled after his design.