I'm doing a dual alt/batt 24v setup in my legacy, but I'm faced with a
decision and am curious what others are doing for the essential buss/batt
side.

The Main Batt will be a regular 24V battery and I'll mount the battery box
behind one of the seats.  The Backup side, can either be a small 7.2ah 24V
battery and box, or another full size.

What have others done?  Recommendations?

Alan