To each their own :)
My reasoning is no moving parts = less wear. But yes, everything is subject to failure.
That's the reason I went with the isolator only, not combiner. Thus no switching is involved, niether high nor low current switching.
The model I went with is a 200 amp single...
Here's a writeup I did from my last tacoma...I plan on doing the same thing with my 80 but with two group 31 batteries :cool:
Key Components...
main battery - odyssey 1200mjt
aux battery - odyssey 1700mjt (battery specs)
mobi-arc isolator (more info here, and tech specs here)
Rockford Fosgate...