I just purchased my first boat (2021 ranger rt188) and am having three elite fs 9’s installed with the nmea 2000 starter kit and Ethernet cable so I can get the most out of the ghost and elite’s. My question is, how do I have the nmea 2000 set up so I can shut it down when I head home so it isn’t draining my batteries. Also will three batteries be enough to power all of these items for a day on the water? Thanks for your assistance on this. I appreciate it.