Timing a Charge

Faults and Technical chat for the Volkswagen ID.3
CarterHounslow
Posts: 60
Joined: Sun Mar 28, 2021 1:01 pm

Re: Timing a Charge

Post by CarterHounslow » Wed Apr 07, 2021 4:18 pm

I don't have to worry about off peak as I worked out it was pretty pointless going to one of those tariffs, or it would save very little. However it seems I'm having the same problem with timed charge, even during the day.

I needed to charge the car today, so I thought I would test out the timed charge to have 80% by 7.15 this evening. Charging at a normal speed I get at home, this should take around 2 hours and 20 minutes from the level of charge that I had. It kicked on the charger half an hour early, charging at only 7-8mph (not the 29 I normally get). Sat here an hour later, still the same.

I'm really not impressed by this as I don't want to sit with 100% battery all night, and sometimes I need to drive to London and back in the same day, and I was hoping to time a charge to 100% and precondition the car, seems like it's buggy.

UPDATE:

It was still charging after 19:15, so there was an issue. I've done it again, telling it to go for 21:30 and put it in the second slot. My car is now charging at 25 mph.

Interesting.

CarterHounslow
Posts: 60
Joined: Sun Mar 28, 2021 1:01 pm

Re: Timing a Charge

Post by CarterHounslow » Thu Apr 08, 2021 7:19 am

Tested it again twice. 9 mph last night and then 24mph this morning.

So in short I've tried 4 timed charges in 24 hours.

1) only charged at 8mph
2) charged at 24mph but was done straight after the first one.
3) only charged at 8mph
4) charged St 24mph

Can't find any reason why it's doing this.

scott28tt
Posts: 652
Joined: Fri Oct 09, 2020 2:34 pm

Re: Timing a Charge

Post by scott28tt » Thu Apr 08, 2021 8:41 am

In case you missed it: viewtopic.php?f=8&t=647
ID.3 1st Edition - Moonstone Grey

CarterHounslow
Posts: 60
Joined: Sun Mar 28, 2021 1:01 pm

Re: Timing a Charge

Post by CarterHounslow » Thu Apr 08, 2021 9:06 am

scott28tt wrote:
Thu Apr 08, 2021 8:41 am
In case you missed it: viewtopic.php?f=8&t=647
Yes I've just seen this, thanks. Good job I have a pod point charger then!

Although if I don't want the car sat on the driveway just sat at 100% for hours and trashing the battery (as occasionally I will need to put it on at night and take it to 100%) you need to work out yourself how many minutes you need to charge the car for.

I have edited this post as I asked if anyone had worked out how long it takes per percent as MPH is not very useful when timing a charge, however I just did the maths.

7.4kw charger, in theory should be 4 minutes and 43 seconds per 1 percent of battery (or 283 seconds if you prefer it written like that)

Therefore if I wanted to add only 40% of battery overnight, that's 40 x 283 Seconds = 11,320 seconds. That's 188 minutes and 40 Seconds. Or 3 hours, 8 minutes and 40 seconds.

Therefore 10% is 47 minutes and 10 seconds roughly.

If you're only charging to 80% or whatever, that's fine.

I think this feature will benefit most the off peak chargers if I'm honest. It's not ideal for what I want to do as I want to be able to precondition the battery etc. Maybe if I time the air conditioning only it might work?

scott28tt
Posts: 652
Joined: Fri Oct 09, 2020 2:34 pm

Re: Timing a Charge

Post by scott28tt » Thu Apr 08, 2021 10:04 am

I'm MUCH more bothered about off-peak charging or charging to a set level by a set time and knowing that it is actually going to work than I am about pre-heating the cabin and battery - so charger-based timing will be my weapon of choice.

For others who have the opposite priority, let's hope that VW can get the on-car timing working reliably for all.
ID.3 1st Edition - Moonstone Grey

CarterHounslow
Posts: 60
Joined: Sun Mar 28, 2021 1:01 pm

Re: Timing a Charge

Post by CarterHounslow » Wed Apr 14, 2021 7:43 am

I spoke to my dealer about this today "first I've heard of this." I said that multiple people have had the same issue on this forum so I'm amazed this is the first anyone at that dealership has heard about it. He said " I know it slows down towards 100% but yours seems to be premature."

Is he talking out of his arse? Does it reduce ac current even on a 7.4kw charger when it approaches 100%? I've never charged it to 100%

Anduain
Posts: 95
Joined: Tue Dec 08, 2020 10:48 pm
Location: Barcelona
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Re: Timing a Charge

Post by Anduain » Wed Apr 14, 2021 11:09 am

Overnight I timed for a departure of 7am, I pay 3c per Kwh from 01:00 - 07:00, Maximum charge was set to 80%.

The charging started in the middle of the night, but the car only managed to get to 70%.

I'll give it a few more days to "learn" and see what happens.

Using an Elli charger at a max rate of 11Kwh.
Yorkshireman, living in Barcelona.
ID.3 Pro Max - Software 0792, Metallic Makena-turquoise

scott28tt
Posts: 652
Joined: Fri Oct 09, 2020 2:34 pm

Re: Timing a Charge

Post by scott28tt » Wed Apr 14, 2021 11:11 am

CarterHounslow wrote:
Wed Apr 14, 2021 7:43 am
Does it reduce ac current even on a 7.4kw charger when it approaches 100%? I've never charged it to 100%

I don't think so, I've only gone to 100% once at home but from the data I can see the delivery seems to have been at the same rate throughout.
ID.3 1st Edition - Moonstone Grey

Anduain
Posts: 95
Joined: Tue Dec 08, 2020 10:48 pm
Location: Barcelona
Contact:

Re: Timing a Charge

Post by Anduain » Thu Apr 15, 2021 9:09 am

Here's some tracking of our consumption data yesterday when I tested the timing charge for a 7am departure.

Pretty much got up there, although not to 11Kwh which it can deliver. Looks like it's charging at around 7 or 8, which is still fine IMO.

Screenshot 2021-04-15 110633.png

Yorkshireman, living in Barcelona.
ID.3 Pro Max - Software 0792, Metallic Makena-turquoise

scott28tt
Posts: 652
Joined: Fri Oct 09, 2020 2:34 pm

Re: Timing a Charge

Post by scott28tt » Thu Apr 15, 2021 9:28 am

What % did you want the car to get to by 7am and what did it actually get to?
ID.3 1st Edition - Moonstone Grey

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