Understanding the 3rd gen charge system - bulk charging

My 2018 3.5 has an alternator output of around 13.5v. If the battery is discharged to let's say 10v, will the charge system increase the voltage to 14.x for bulk charging?

If this is the case, what voltage does the battery need to be at for the voltage to increase? Is it a high/low value or a gradual curve?

 

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Unfortunately the truck does not adjust its own charging voltage based on depth of discharge. Max charge voltage appears to be around 13.85V on these trucks, which IMO is on the low side for full charging of ANY lead-acid battery (not just AGM units).

It is possible to adjust the charge voltage through an ECU tune on these trucks (my suggestion would be 14.3V for a standard flooded battery, 14.5V for AGM, or 14.4V for all-around). Otherwise, I'd say just throw an external charger on it overnight to top up the battery every couple months or so.