[toosteeley]

Your setting are confusing. Simplifying will likely help.

Just set it to charge to 80%, set your departure time to 8:00am with pre-conditioning turned off, set your charge window to 11pm - 7am and everything should be fine.

 

[toosteeley]

Ya, it won't do that.

What amperage are you set to?

 

[toosteeley]

How many amps is your charger providing?

If anything around or over 32amps, you can absolutely charge from 20-80% overnight. There's absolutely no need to set a departure time 4 days in advance.

 

[toosteeley]

Again, what amperage is the car drawing? Not sure what you mean by "granny charger". Are you using a level 1 or 2 charger?

 

[toosteeley]

You are totally right, the car is ignoring your departure if you set a departure time. The departure time and date is only working for preconditioning the car, not charging to departure.

My understanding is the car will use the departure time to calculate if there's enough time (and amperage) to charge to the determined %. If not, it will start charging when it feels it's necessary and ignore the set charging window. If the OP is using a L1 charger, I'm not surprised all setting are being ignored.

 

[toosteeley]

15% in 6 hours is definitely level 1 charging. I'm afraid that's the issue.

 

[toosteeley]

I'm not saying the BMW method of charging isn't flawed - it certainly is. Your logic is sound, just not the way BMW thinks, unfortunately.

 

[toosteeley]

I've had one occasion where I was charging from <20% to 100% and the car started changing prior to the pre-set window. Annoyingly, it finished charging with time to spare, so could have fit into the window, but at least it did what I expected and started charging early to be sure full charge was reached prior to my set departure time.

 

[toosteeley]

^ Which smart charger did you go with?