Hi smk,
No, I don't mind automatic in some cases. My charging solenoids are automatic, but I do have manual control over them. What I don't like is the 12.9 volt cut out and the 13.4 volt turn on.
I don't think I'd install wire that was only capable of 20 amps. I changed over to 50 amp automatic circuit breakers after blowing 2 60 amp fuses on the OEM charging path. (I admit I'm a power hog and I push my system HARD).
I have seen 12.7 volts on my chassis system, for example when running the water heater on the electric setting. I admit that most folks would not do that.
