For my system, there is one Group 27 battery, one 30A circuit breaker close to the battery, then a panel with 8 circuit breakers. The wiring has all been selected to be at least as large as recommended when using the 3% voltage drop tables for marine wiring. The battery circuit breaker is usually on. When I leave the boat, I turn off the autopilot, VHF, lights if they were on, and the GPS chartplotter if it was on. The circuit breaker to the solar panel is left on.
It seems that if I disconnected the solar panel from the circuit breaker and instead connected it to a fuse then directly to the battery, there would be three fewer connections, but the connections that would be eliminated are all larger wire connections between the battery and the panel. Existing includes regulator wire to panel, main panel feed to panel, both sides of 30A circuit breaker, then battery for five connections between the regulator and the battery. A direct wired system would have regulator wire to fuse, fuse to battery for two connections between the regulator and the battery.
The panel is 10 Watt, and there is a charge controller between the panel and the circuit breaker.
The maximum voltage with the charge controller is 14.1.
Maine Sail- The "HowTo" Articles in your LINK are some of the best content anywhere for sailboat related mechanical topics. I have read some of them several times and referred others to them, as well. Thank you for making those.