V21 Dual battery set up - suggestions ?

[smokeonthewater]

no the engine and trim pump are connected to the start battery via the on/off switch

everything else is connected to either or both via the off/1/2/both switch and in normal operation are connected to only the deep cycle at all times

the big advantage of this system is that it is not touched except to disconnect batts for storage or in the case of a battery failure..... normally you have two separate systems and the start batt is only used for the engine

then the acr allows the engine to automatically charge the start batt first and then the deep cycle

[spareparts]

ditch the deep cycle battery, run two good starting batteries. You'll be much better off ditching the deep cycle for a starting battery. the only reason to have a deep cycle battery on a boat is if you are running a trolling motor or running a battery bank with an invertor. With the acr and a a off-1-all-2 switch(stay away from the perkos, they don't hold up well), Wire the automatic bilge pump directly to one battery, everything else thru the switch. If you want to seprate the house systems from the engine, you can run three on-off switches. One will be hooked between battery 1 and the engine systems, the next switch is hooked between the house systems and battery 2, the last switch goes between the two battery's to allow an emergency position to connect both battery's together. You can run the dual battery switch in conjunction with a separate on off, but it can get confusing, what switch does what. Boston Whaler runs two combination switches on their dual engine boats, you have to read the instructions beside the switches to figure out what they are trying to do each time you turn the power on. Look at the Blue Seas diagrams and the battery management panels.