Join Date: Sep 2008
Location: Victoria B.C. Canada
Thanked 105 Times in 96 Posts
Rep Power: 9
Casey's suggestions are not really out of date but they do have their faults. From the quote above I assume Casey is recommending 3 separate switches - a switch for each bank and a parallel switch. This is over complicated and adds expense where it is not needed. I do agree with Casey's charging of the start battery with a combiner of some type - the Echo Charge is my preference.
You already have a 1/2/both/off switch that will do all you want. House becomes #1, the other battery #2. The scenario that makes the most sense is to treat the start battery as an emergency battery and start on the house bank. When you arrive switch to #1, when you leave switch to off. The other battery is there when needed and always at full charge.
There is no good reason to ever combine the batteries when starting the engine. If one bank is not able to start switch to the other bank. Combining a good bank with a dead one is not a good plan. The 1/2/both/off switch will allow you to charge both banks in the event that the combiner/Echo Charge fails by switching to the both position.
Casey's idea accomplishes the same result - but it does sell more switches in the process as well as making things more complicated than necessary.
Living aboard in Victoria Harbour