quick update, I bought a multimeter because thus far the only thing I've been judging my voltage on was my gauge inside the car, which doesn't have the greatest resolution.
while running with no power items on inside the car I'm getting 13.5 at best, fluctuates basically from 13 to 13.5

I know 14.5 is kind of best case.
Does this sound like an issue to anyone or still reasonable to get 13.5?