A response in a previous thread got me wondering...how does everyone wire their two battery systems? I use an isolator to keep my batteries charged, but operating independently. My main battery is for engine start only and is also wired to a second float switch for my bilge pump in case the aux battery dies or the main float switch goes bad. My aux battery runs everything else. My thinking is that I always want to have a fully charged battery for engine start since not only will my engine get me home, it will charge both batteries when running. If my aux battery should fail or go dead, I have some comfort knowing I have a "fresh" battery for engine start. I consider accessories secondary. Any other views?