Al,
Pertaining to the Blue Sea equipment, you have it wired the way that the manufacturer suggests. This is a complex category. Our approach to this category uses different equipment (same switch but different voltage sensing relay) and our scheme will change according to the boat type (whether the stereo is dependent on the helm buss for touch screen controls or can be wired totally independent), the amount of current draw from the audio equipment and the amount of reserve time for the stereo batteries. One of the largest problems with ACR/VSRs is they don't combine after a long period at rest with a large stereo so the stereo bank isn't brought on line with the alternator as expected. Not a problem if you are going straight home but a definite concern if its a long weekend with no AC access. So we have schemes to confront the problems of systems becoming too large and exceeding the functional limits for which the ACR/VSRs were originally intended. This category should not be generalized with a one scheme fits all approach.
Contact me via email so I can learn more about what equipment you have or will have, your total battery reserves and how you will use the system and boat most weekends. At that time I can make some suggestions that will be specific to only your sysyem. Give me a little time as its crazy this time of year.
[email protected]

David
Earmark Marine