So i'm looking into the Scheduled/delayed Charging feature that everyone seems to have issues with, just to see if i can pinpoint what is going wrong.
For me it doesn't seem as broken as i was initially thinking it was, but I'm really curious what everyone's experience is.
I will update this post over time with more data I've gathered and conclusions I've drawn.
Car: European Model Year 22 ID.4, with OS version 2.3 (factory default)
EVSE: 11KW 3-phase smart charger (dumbed down for these experiments)
1st test:
So I have off-peak rates between 11PM and 7AM (23:00 - 07:00) weekdays and full weekends.
I've defined my home location as a charging location, set 23:05 to 06:55 as preferred charging times in the car, set the "leave time" to 7 AM, and set the maximum charge level to 80%.
I've also defined to unlock at the end of the charging.
Start of charge level: 72%
End of charge: 80%
Actual charge window: 0:48 AM - 07:48 AM
Power consumption graph (from the whole house):
Dutch -> English
totaal -> total
fase -> phase
stroomverbruik -> powerusage
SOC graph (in percentage):
Analysis:
Ignore the bumps in the red phase 2 and short sharp spikes in the blue phase 1, those are from other appliances.
what you see is that due to the high level of charge, the car decided to only trickle charge on phase 1 (blue) with 1KW until around 07:30 AM and then briefly 3-phase with 11KW until 80% SOC was reached at 7:48.
conclusion is that the car is quite smart with it's charging, only doing a fast charge in the final moments, likely to warm up the battery a bit and/or make the schedule.
problem with "making the schedule" is that it is an hour late...
The cable was released upon completion of charge.
Hypothesis:
The car internally uses a wrong timezone somehow (ignores summertime?) and is therefore an hour late.
Test 2:
For this test I've simply set my preferred charging time and leave time 1 hour earlier to 5:55 and 6:00 AM.
This time the battery was also much further discharged.
Start of charge level: 42%
End of charge: 80%
Actual charge window: 02:53 AM - 06:23 AM
power consumption graph (from the whole house):
SOC graph:
Analysis:
Again, ignore the short spikes in phase 1, that's noise.
This time the car needed to replenish about 30KW, so it decided to do a 3-phase charging from the start, but limited to 8KW.
Again at the end it speeds up to 11KW for 20 minutes, likely to preheat the battery.
Cable was unlocked again at the end of the charge
Due to the adjustment of the end time it now finishes well before 7 (but still after the requested 6 AM)
Conclusion: setting the leave & preferred charge time an hour earlier worked, even for a deeper discharged state as a 42% to 80% charge.
Hypothesis:
Due to the apparent one hour internal offset, could people be trying to disconnect the cable while it's still charging and therefore still finding it locked?
As most of the charge is delivered at the end, leaving early could also cause the charge to fall short a lot.
Still my newer car could have fixes others don't have yet.
I'll continue testing, playing with and documenting this feature, to better understand it, so "to be continued"
In the meanwhile, I'm curious to learn what charge curves and behavior others see.
It could be the car uses a fixed time zone to interpret the preferred window and/or leave time.
If you have access to your smart meter and /or EVSE data logging just as me, please chip in so we can find a decent solution for many.
my current settings from WeConnectID (Dutch, sorry):
thuis -> home
weekdagen -> weekdays
Details vertrektijd -> details time to leave
Voorkeurstijden -> preferred times (to charge)
For me it doesn't seem as broken as i was initially thinking it was, but I'm really curious what everyone's experience is.
I will update this post over time with more data I've gathered and conclusions I've drawn.
Car: European Model Year 22 ID.4, with OS version 2.3 (factory default)
EVSE: 11KW 3-phase smart charger (dumbed down for these experiments)
1st test:
So I have off-peak rates between 11PM and 7AM (23:00 - 07:00) weekdays and full weekends.
I've defined my home location as a charging location, set 23:05 to 06:55 as preferred charging times in the car, set the "leave time" to 7 AM, and set the maximum charge level to 80%.
I've also defined to unlock at the end of the charging.
Start of charge level: 72%
End of charge: 80%
Actual charge window: 0:48 AM - 07:48 AM
Power consumption graph (from the whole house):
Dutch -> English
totaal -> total
fase -> phase
stroomverbruik -> powerusage
SOC graph (in percentage):
Analysis:
Ignore the bumps in the red phase 2 and short sharp spikes in the blue phase 1, those are from other appliances.
what you see is that due to the high level of charge, the car decided to only trickle charge on phase 1 (blue) with 1KW until around 07:30 AM and then briefly 3-phase with 11KW until 80% SOC was reached at 7:48.
conclusion is that the car is quite smart with it's charging, only doing a fast charge in the final moments, likely to warm up the battery a bit and/or make the schedule.
problem with "making the schedule" is that it is an hour late...
The cable was released upon completion of charge.
Hypothesis:
The car internally uses a wrong timezone somehow (ignores summertime?) and is therefore an hour late.
Test 2:
For this test I've simply set my preferred charging time and leave time 1 hour earlier to 5:55 and 6:00 AM.
This time the battery was also much further discharged.
Start of charge level: 42%
End of charge: 80%
Actual charge window: 02:53 AM - 06:23 AM
power consumption graph (from the whole house):
SOC graph:
Analysis:
Again, ignore the short spikes in phase 1, that's noise.
This time the car needed to replenish about 30KW, so it decided to do a 3-phase charging from the start, but limited to 8KW.
Again at the end it speeds up to 11KW for 20 minutes, likely to preheat the battery.
Cable was unlocked again at the end of the charge
Due to the adjustment of the end time it now finishes well before 7 (but still after the requested 6 AM)
Conclusion: setting the leave & preferred charge time an hour earlier worked, even for a deeper discharged state as a 42% to 80% charge.
Hypothesis:
Due to the apparent one hour internal offset, could people be trying to disconnect the cable while it's still charging and therefore still finding it locked?
As most of the charge is delivered at the end, leaving early could also cause the charge to fall short a lot.
Still my newer car could have fixes others don't have yet.
I'll continue testing, playing with and documenting this feature, to better understand it, so "to be continued"
In the meanwhile, I'm curious to learn what charge curves and behavior others see.
It could be the car uses a fixed time zone to interpret the preferred window and/or leave time.
If you have access to your smart meter and /or EVSE data logging just as me, please chip in so we can find a decent solution for many.
my current settings from WeConnectID (Dutch, sorry):
thuis -> home
weekdagen -> weekdays
Details vertrektijd -> details time to leave
Voorkeurstijden -> preferred times (to charge)