[Lenny5160]

I run 2 batteries with an alternator on my door car. I can and have run the entire season without hooking up a battery charger. I also put relatively few demands on the electrical system, with a belt-driven fuel pump and almost no fan usage when the car is not running.

I've not run 16 volts, but I'm considering it for my dragster which has always had 1 battery and alternator. I do put the charger on that after a few runs.

I'm not sure if 16 volts is a reasonable consideration with the "daily driver" thing. It sounds like voltage is your primary concern rather than reserve capacity. I understand that more reserve should lessen or slow the voltage drop when demand is high.