If you’ve done any wiring on your boat, you know how much wire size is emphasized in manufacturer specifications, and there is a very good reason for it. If the batteries are the heart of the system, the wires are the arteries and veins. Having a perfect heart won’t matter if your delivery system is compromised – you need adequate sized wire to carry the necessary current.
This is a companion discussion topic for the original entry at https://seabits.com/wires-veins-arteries/