Today i tried the delayed charge start from the remote control.
I had a 50% discharged battery and a L2 charger, that typically does 3 bars per hour.
I needed 7, just to leave it a bit undercharged. So i did set the on to 10 hours from start and off to 12.5. In the morning i had full "tank" and the last bar disappeared in less than a mile. The downhill regen was better, but still not full. Justified.
The observation is that at the full "tank" the regen is still a bit impaired.

so L2 charger = 3 bars per hour
    L1 charger = 0.67 bars per hour or 1 bar in 1.5 hours

With my driving a bar is 5 miles. That is trying to follow the speed limit +- 3 mph