Boy, after scanning Scott's post #16, I'm not sure I can handle that additional complication in my life, even if it helps my boat light up the entire marina, make dinner for us and do the laundry. And I've watched a lot of Jeff Cote's videos too, they're great, I love the guy, but I only have so much time in life. I'm installing new alternators this spring. Double pulleys already so that's nice, but the old ones are original to the boat and only 50 amp. I'm going with a relatively simple upgrade to 70 amps, simple swap, same wiring pattern (Marine Power 454's). I'm already wondering about whether I should replace the wiring with something heavier, just for that relatively small amp increase. It never ends. External regulators might be a big improvement, I don't disagree, but at some point I only have so much time and mental capacity to maintain complex systems. I had to figure out the error message lights and repair a Keurig coffee machine at home this week. Even the coffee machine is eating pieces of my life with higher complexity.