Return of phantom 16 amp charging

[Roy W.]

This appears to be quite right. After 5 successful charges since updating to 2020.24.6.4 last night my charge rate went back to 4kw. Oh well...

Mine too. Back to 4kW last night after three happy 7kW charges.

 

[ACarneiro]

AAAAargh! Is there no end to this saga??

 

[Dilly]

AAAAargh! Is there no end to this saga??

I thought I saw a rumour that 28.x cured this. Probably too early to tell.
I won’t need a decent charge until the weekend but I’ll keep an eye it. Still on 24.6.4 but that may change. Who knows...

 

[dan223]

I've also heard that 28.x seems to resolve it, time will tell though. Plenty of people have confirmed 24.6.x hasn't fixed it (including Tesla apparently).

 

[davidmc]

I have also had the dreaded 4kw charge today. First time (on 2020.20.17) and at work. Weird thing is yesterday & last Friday it charged fine.

Luckily i could stop/start via the app to get back to 7/8kw but happened 3 times during my charge

 

[Jason71]

I've also heard that 28.x seems to resolve it, time will tell though. Plenty of people have confirmed 24.6.x hasn't fixed it (including Tesla apparently).

Given that there aren't many people on that version yet I think its too early to say for certain that 28.x fixes it but lets hope.

 

[KaiM]

I got the following response from Tesla:

"Our technicians have reviewed your reduced charge rate concern and have confirmed that this is being caused by a known firmware bug on your current firmware level. The fix for this bug has been implemented into firmware 2020.28."

 

[DashHound]

I hope 2020.28 will fix it, I had been complaining to the company that installed the charger until they pointed me to this thread.
Charger 1 Tesla 0 :-(

 

[bhav]

First charge on 28.2 last night, from 38% to 90% (M3 LR AWD)

The fact that it was complete by early this morning implies that it didn't suffer the 16A issue - don't have any other way to tell but it's a positive sign on the first attempt.

 

[dan223]

Just had a call from Tesla to tell me the issue is now fixed in 2020.28.x

 

[davidmc]

Just had a call from Tesla to tell me the issue is now fixed in 2020.28.x

Did you ask when is it being pushed to whole of the uk fleet?

I hope the answer wasn't "By the end of the Year"

 

[Lx2m3]

First charge on 28.2 last night, from 38% to 90% (M3 LR AWD)

The fact that it was complete by early this morning implies that it didn't suffer the 16A issue - don't have any other way to tell but it's a positive sign on the first attempt.

A good solution to that is to use TeslaFi - useful info about charging, driving, performance, cost etc.
I’ll send you a referral code if you’re interested.

 

[bhav]

A good solution to that is to use TeslaFi - useful info about charging, driving, performance, cost etc.
I’ll send you a referral code if you’re interested.

Thanks, not too interested tbh - feels like a rabbit hole to obsession about all of those things and I'm happy just seeing the battery % on the screen / app

(it's a lease so not worried about battery degradation as I'll only have the car for 3 years, and my charging is free in my flat's underground car park except for the monthly membership with Polar)

 

[Dessie 2me]

Hi Guys.

First post. I bought a December 2014 Tesla s 85 on Monday this week. Charged it at a hotel until I got my home charger installed yesterday. The hotel charger was not a supercharger but charged it at 30 miles per hour. First time using new Tesla wall charger and I am only getting 8 Miles per hour, max 16 amps. Can I assume this is the new software glitch and this will be resolved soon.

Cheers.

 

[Dilly]

Hi Guys.

First post. I bought a December 2014 Tesla s 85 on Monday this week. Charged it at a hotel until I got my home charger installed yesterday. The hotel charger was not a supercharger but charged it at 30 miles per hour. First time using new Tesla wall charger and I am only getting 8 Miles per hour, max 16 amps. Can I assume this is the new software glitch and this will be resolved soon.

Cheers.

S/w 2020.20.12, 20.17 & 24.6 all seem to have the fairly random 16 amp charging problem.
28.1 and or 28.2 have apparently fixed it
See what you’ve got installed

 

[NewbieT]

Hi Guys.

First post. I bought a December 2014 Tesla s 85 on Monday this week. Charged it at a hotel until I got my home charger installed yesterday. The hotel charger was not a supercharger but charged it at 30 miles per hour. First time using new Tesla wall charger and I am only getting 8 Miles per hour, max 16 amps. Can I assume this is the new software glitch and this will be resolved soon.

Cheers.

In the car, if the charge speed is 16/16 it’s probably settings in your TWC. If it’s 16/32 it’s probably the bug.

Charge a few times and if you never get 32A
contact your installer.

 

[MrBadger]

The hotel charger was not a supercharger but charged it at 30 miles per hour. First time using new Tesla wall charger and I am only getting 8 Miles per hour, max 16 amps. Can I assume this is the new software glitch and this will be resolved soon.

Welcome. Are you sure that the wall connector was setup to do 32A? Also depending on your electricity supply, 16A may not be wrong. You don't mention how electrically your charger is connected to the house (fuse supply would tell you that), but it sounds like single phase 16 or 32A. Presumably the wall connector was set up to match? There is an internal rotary switch that needs to be configured. The only way to know for sure is to look at the charge info and the second of the 2 digits. If you have 16/16 then the car is drawing what it should be (but wall connector may not be setup properly), if it says 16/32, then there could be other reasons for that, one of which is the charge bug.

Sounds like your 30mph charge was 3 phase at 11kW, so that would be 3 x 16A.
Your 8mph at 16A sounds a little low, but its very much dependent on the car. With current Model S', looks like you would expect 11mph at 16A and 7mph at 10A.

[edit] above came in mid post

 

[davidmc]

There is an internal rotary switch that needs to be configured.

I believe someone ages ago had this problem and the rotary switch was set incorrectly. Might be the cause why the charger will only give 16amps (Worth a check - Nr 6 seems to indicate 32amps)

Of course you need to work back to the cause. Start with the car to make sure no settings are incorrect as @VanillaAir_UK & @NewbieT mentions above.

Also if the cable you use is 16amps that can also cause the issue? - i did this once using a volvo hybrid cable that was only 16amps and wondered why i was not getting 32amps

Also before you dive in - Safety First! - Power the lot off at the mains

 

[MrBadger]

Worth remembering that it may be at a non 32A setting for a reason, ie limited by cable (not so obvious), fuse (a bit more obvious), something else (even less obvious)

Also worth noting that there is a fragile ribbon cable that needs to be disconnected before getting to the switch. So don't just go taking the front off otherwise you could well damage something.

Also, the chart above looks wrong for UK Gen 2. No mention of < 12A setting which there definitely is. iirc the definitive list is on the inside of the lid.

 

[MrBadger]

Also, the chart above looks wrong for UK Gen 2. No mention of < 12A setting which there definitely is. iirc the definitive list is on the inside of the lid.

Yep, here are the UK Gen 2 settings. Very different. They are attached to the internals of each unit, iirc on inside of lid.