I monitor smart charging on my Mercedes sedan, who has ECO stops and don't see it as very smart.
It gives bulk charge at 14.5V for few minutes after morning start, what helps in engine warming, but 14.5V is killer voltage and the batteries who last in older models in excess of 10 years, seldom last for 5 in "smart" cars.
First time I heard about the system, I assume it does regenerative charge during braking. That does not happen as I often seen no charge (12.5v) on braking and then high charging (13.8v) on acceleration.
Ford plays with their system while not notifying customers about it.
Took me long time to figure out why my 6l Powerstroke was killing dual batteries after couple of drives on my yard. Later I learn on forum, that Ford glow plugs could not hold high charging voltage, so Ford made a program that would not activate alternator for several minutes till GP were no longer working.
So unaware owners were killing the batteries on short drives and Ford did not feel like making a note in manual about it.
I have 2017 Ford with dual alternators. Did not monitor it closely but I doubt it has smart charging. I opted for electric cabin heater, who draws over 100 amp right after engine start, so there is not much margin for smart charging.
