Way to Purposely Half-Charge Prime with incorrect Departure Time?

Someone's lament in another thread (about how he couldn't take advantage of "B" Mode regen while going down a steep grade by his house in the mornings, as charging the car overnight already fills the battery up, and to prevent over-charging, the ICE comes on), got me to thinking:

Is there a way to charge the Prime only 1/2 way at night, then?

Obviously this would only be for unique situations, but if I remember the manual correctly, I think it mentioned that if you do a "Charge with Departure Time", and there's not enough time for a full charge, then (obviously) you won't have a full charge before your departure time. But I can't remember if it said if it will stop charging at your inputted departure time if it's not yet fully charged, or if it will keep on charging past your inputted departure time until it's full, or until you unplug it.

I suppose I could try this myself, but was just wondering if anyone had any reason to try this out yet.

(If your EV range is empty and you only want to charge it 1/2 way... say you get home at 8pm, then set "Departure Time" for 10:30pm that same night -- there's obviously not enough time for a full charge, but even if you don't actually leave until 7am the next morning, will it keep charging past the 10:30 departure time until full or unplugged, or stop at your inputted departure time of 10:30?)

 

At about 3:15pm local time today (with an empty EV charge) I set "Departure Time" to 6:00pm as an experiment -- under 3 hours later. Since that's not enough time for a full charge (5+ hours is needed at 120V), I want to see if using "Departure Time Charge" (with not enough time for a full charge) will shut off charging around the inputted departure time, or keep it charging until full.

After entering "6:00pm departure time" at around 3:15 today (it accepted it -- I edited the previous departure input of 7:00am from yesterday morning to 6:00pm tonight) I went to plug it in. At first, the green light by the charger port blinked a couple of times (indicating a Departure Time charge rather than Charge Now solid green light) but after 4-5 blinks, the blinking green turned solid and charging began. I then opened up a car door to see if the display would show anything, and it said charging time would be 5+ hours. So I don't know if it will "shut off" around (or before) the entered 6:00pm departure time, or keep going past 6:00pm until full or unplugged. Will let you know.

 

Continued to charge.

At 6:05pm (5 mins after supposed "6:00 Destination Time"), charging was still going on, with a solid green light. Opened a door to see the display showing around 2hrs left for a full charge. I unplugged the charger cord, then got in the car, pressed the Charge Timer button to have a look, and it indeed still showed the 6:00pm Destination Time.

So it appears if you start a "Destination" charge without enough time left for a full charge, it will just keep charging until full (or you unplug it).

This is what I figured, but worth doing once just to see if it would cut off early and give you just a partial charge...