Charging issues 36.5.5

[Chrisgillett]

Hi team,
Since the new update this week my car has not been charging properly. I’ve done 13k in the last 11 months so have a fairly consistent routine - plug in at night, scheduled charging from 00:30, usually 3.5hrs of charging time needed to get from 45% back to 80%.
Since the update on Thursday I only got 20% charge per night.

Anyone else having the same issue? Any ideas what might have changed?
thanks
chris

 

[ACarneiro]

I believe some people have reported the charge rate defaulting back to 16A, so you may want to double check that and adjust accordingly. Once you set it back to 32A the setting should "stick".

 

[spon88]

I believe some people have reported the charge rate defaulting back to 16A, so you may want to double check that and adjust accordingly. Once you set it back to 32A the setting should "stick".

That could well be it. Last night similar happened here when my app set back to 16A but fortunately I spotted it. It would only let me adjust after the charge started however.

 

[Chrisgillett]

Thanks chaps. That might explain it… partly.
Just sitting in the car now and it doesn’t even allow the slider to go to 32A. Max it is allowing is 16, and it was set to 10A when I got in.
Huh?!
Why can’t I have 32?!

 

[spon88]

Thanks chaps. That might explain it… partly.
Just sitting in the car now and it doesn’t even allow the slider to go to 32A. Max it is allowing is 16, and it was set to 10A when I got in.
Huh?!
Why can’t I have 32?!

Did you try starting a charge and seeing if it will change? Mine was "locked" last night before the charge started for some reason. Oddly I've just checked my app and the rate had dropped back to 30 amps but it does allow me to adjust the rate before charging. Seems a bit flaky

 

[MrBadger]

Is it still plugged in?

 

[Gatsojon]

This happened to me last night. Charged at 16 Amps rather than 32 as usual. On the App I can’t set the charge level greater than 16. Very odd.

 

[Alex987854]

This happened to me last night. Charged at 16 Amps rather than 32 as usual. On the App I can’t set the charge level greater than 16. Very odd.

It seems that you can only change to anything above 16 Amps while it's charging. Once you change it, it seems to stick OK, but will it will still show 16 in the car when you aren't charging.

 

[ACarneiro]

I think the charging logic defaults to 16A as that’s the maximum charge rate for each of the three onboard chargers (it assumes triphasic availability).
Only when you plug it in does it realise that you’re on monophasic power and then 32A becomes available by combining 2 of the onboard chargers (I don’t know why they didn’t go with the three and allow 48A on monophasic, but here we are).

 

[Chrisgillett]

Every day’s a school day. Just plugged it in and started charging and it Does allow me to up the amps. But defaults to 10A if I stop and also via the app.
This must be new, but explains why my year of consistency has gone.
Better come back pdq - I’m not going out at midnight every night to manually start the damn thing.

 

[Chrisgillett]

Is it still plugged in?

See above. I’ve had a play. Guess I’ll have to wait until tonight to see what it is going to do

 

[Dilly]

I updated to 36.5.5 on 26/10. Did a charge at 00:30 on 27/10. My stats show 32amps going in from the off.
right now, not plugged in and app says 16amps.
I only need a small top up tonight via a boost on my Zappi.
I’ll see whether it goes flat out or not.

 

[spooksman]

Better come back pdq - I’m not going out at midnight every night to manually start the damn thing.

I agree with that.

First charge on 36.5.5 coming up tonight (due to start at 00:30), but when I plug the car in it says 10A in the app.

We'll see what happened in the morning I guess, but the extra hour of charging tonight may confuse me...

 

[Jason71]

I updated to 36.5.5 on 26/10. Did a charge at 00:30 on 27/10. My stats show 32amps going in from the off.
right now, not plugged in and app says 16amps.
I only need a small top up tonight via a boost on my Zappi.
I’ll see whether it goes flat out or not.

The car has always shown 16amps ( unchangeable) when not plugged in. Normally no one notices. it is only when they have an issue people start looking and it confuses them. Every time there is a new charging issue and a thread is started this comes up. Now they have added it to the app just to confuse people even more. Not saying there is not an issue here just that whatever may or may not be it this aspect is probably not relevant.

 

[amnlinc]

After updating yesterday my charge overnight was at 16A. I started it again this morning and increased it to 32 via the app. Will see what happens tonight

 

[Columbo]

I don't seem to be able to above 16A but that may be because it's on 3-phase

 

[Jason71]

I don't seem to be able to above 16A but that may be because it's on 3-phase

Correct. 3x16 is 48amps which is 11kw which is the max AC that an M3 can handle.

 

[Chrisgillett]

Interestingly, I never made the jump to maths but it is easy:
Power = current x voltage.
So 32A x 220V = 7040W = 7kW

Going back to my OP, if my car was only charging at 10A the last 2 nights it’s clear to see why it wasn’t charging fast!

 

[amnlinc]

I was back to charging at full speed last night

 

[PenfoldT]

Clocks have gone back in the UK today and the scheduled charging time has also jumped back an hour… Hrmm, I suspect software dev people that thought that was a good idea….