[david.talbot4513]

I have exactly the same issue with my 23 plate SE I-Pace using a Zappi and Octopus energy. If I go back into the car after plugging in and setting to 80% it resets to 100% which is very frustrating!

 

[Delta5]

It’s a non issue because Jaguar have stated that charging to 100% does not harm the battery, moreover it needs to charge to 100% to balance the cells. When updating OTA the instruction is to unplug the car and lock it so updating should not upset any programme you try to set.

Myself I have Octopus Go and spare solar, so juggling both I reach 100% once a week, if I need a full charge next day can charge manually

 

[Big Dunc]

It is quite correct that Jaguar say the battery can be left permanently charged to 100% as there is built in head room and indeed all car manufacturers say this (as do most E bike makers) as they want people not to be inconvenienced or have range anxiety.
If you are using the car daily there is probably no harm in charging to 100% as it is only likely to sit at that level for a few hours. What the battery does not like is sitting for long periods of time at very high (or low) levels of charge. Ask any expert in Lithium ion batteries (until recently I used to work with a few) and they will tell you the best state of charge to leave a battery at for a period of time is around 50%. Both Jaguar and Tesla recommend that if the car is going to be stored the battery should be between 30% and 60%. That is in the manual / I guide.
My I Pace can often sit for a few weeks without being used, so I charge it fully before a long trip but otherwise wait until it is down to below 40% and charge it to 55%. The nice thing about that is, the charging is controlled by the timer in the charger to only charge at off peak times so if the car annoyingly resets the charge limit to 100%, then in the six hour window it can only charge by around 45% anyway, so normally ends up around 80%, so I am relaxed by it.
In contrast, my wife uses her Tesla daily so it gets charged to 80% each night. There is absolutely no need to go to 100% in our case as she only does between 100 and 200 miles a week. In addition, the Tesla charging network is so good that it doesn't matter if she has to do a long trip at short notice.
Cell balancing is another interesting thing. I am aware that some manufacturers recommend doing this regularly, typically once a month. Tesla say that cell balancing is not required. I have just been through the I Pace manual and cannot find one mention of cell balancing so I guess that Jaguar don't think it is required either. My I Pace does do the odd long trip, in which case it is charged to 100% before hand so gets a chance to cell balance. In contrast the wife's Tesla hardly ever does long trips and I think it may only have been charged to 100% once or twice in the 5 years we have owned it.
The above is just my personal view. I am not saying that other people should do the same as me if they prefer to do something else. The world would be boring if we were all the same.

 

[Spectrum]

It is quite correct that Jaguar say the battery can be left permanently charged to 100% as there is built in head room and indeed all car manufacturers say this (as do most E bike makers) as they want people not to be inconvenienced or have range anxiety.
If you are using the car daily there is probably no harm in charging to 100% as it is only likely to sit at that level for a few hours. What the battery does not like is sitting for long periods of time at very high (or low) levels of charge. Ask any expert in Lithium ion batteries (until recently I used to work with a few) and they will tell you the best state of charge to leave a battery at for a period of time is around 50%. Both Jaguar and Tesla recommend that if the car is going to be stored the battery should be between 30% and 60%. That is in the manual / I guide.
My I Pace can often sit for a few weeks without being used, so I charge it fully before a long trip but otherwise wait until it is down to below 40% and charge it to 55%. The nice thing about that is, the charging is controlled by the timer in the charger to only charge at off peak times so if the car annoyingly resets the charge limit to 100%, then in the six hour window it can only charge by around 45% anyway, so normally ends up around 80%, so I am relaxed by it.
In contrast, my wife uses her Tesla daily so it gets charged to 80% each night. There is absolutely no need to go to 100% in our case as she only does between 100 and 200 miles a week. In addition, the Tesla charging network is so good that it doesn't matter if she has to do a long trip at short notice.
Cell balancing is another interesting thing. I am aware that some manufacturers recommend doing this regularly, typically once a month. Tesla say that cell balancing is not required. I have just been through the I Pace manual and cannot find one mention of cell balancing so I guess that Jaguar don't think it is required either. My I Pace does do the odd long trip, in which case it is charged to 100% before hand so gets a chance to cell balance. In contrast the wife's Tesla hardly ever does long trips and I think it may only have been charged to 100% once or twice in the 5 years we have owned it.
The above is just my personal view. I am not saying that other people should do the same as me if they prefer to do something else. The world would be boring if we were all the same.

^^ This, sage advice

 

[JPP]

My MY23 also started to do this randomly if I didn't have cause to use the car and unplug following a charge the previous evening. That situation seemed to be the only trigger. Only annoying because I liked one pedal driving first thing!

 

[Big Dunc]

I tend to always unplug when it is charged. I notice if it is plugged in every few hours it was charged for ten minutes or so which annoyed me.

 

[Globalste]

Hi, I have the same problem, the car set to charge to 85% at low cost hours only, but on random occasions it charges to 100%.

I think I have found the reason why....

Yesterday it did it again, I asked my wife if she had changed the charge setting - I got a rude reply😱. What she did admit to however was putting something in the boot while the charger was plugged in. So I did a test.

I set the car back to charge to 85%. I plugged the charging cable in. Locked the car, unlocked the car, opened the boot using the key fob, closed the boot using the button inside the boot lid. Locked the car again using the key fob. Opened the car, sat in the drivers seat, checked the charging level and it was now set to charge to 100%.

I have tried this now three times with the same result. I have not tried to see if the Frunk causes the same issue.

Our car is a 2021, 400 HSE, we use an Ohme 7kw charger (which is probably irrelevent as the car is not charging at the time the problem occurs, it is merely plugged in waiting to charge).

The charger is set to charge immediately, but the car is set to refuse charge until low cost hours (23:30-05:30 Octopus Intelligent go).

Hope this helps. It would be nice to know if others can replicate the issue.

That happens when you have "once only" selected, by unlocking the car and opening and closing a door you cancel the once-only.

 

[Globalste]

In saying that, if mine charges with it's Ohme charger it stops at the Jaguar's 80% request. And then when a day passes the Ohme tries to automatically put in the same level of charge again (eg 50%) and then charges the car up to 100%.

 

[Jon2Jags]

That happens when you have "once only" selected, by unlocking the car and opening and closing a door you cancel the once-only.

An interesting idea, but we always have it set to 85% we've never used the 'only once' tick box.

Three days ago we were updated to Pivi-pro 4.3.1, over the air (OTA). It will be interesting to see if this still happens with the new software.

The car is in for its 4 year service in a couple of weeks when other firmware/software modules may be updated.

Having had the car for 6 months now, as this is the only idiosyncrasy we've seen, we're happy to live with it - rather 100% charge than no charge added.

While it would be great for everything to work to spec, I'd hate them to fiddle with the software and cause other problems while trying to fix that one minor issue.

 

[Globalste]

Does it do it on any other charger J2J? Curious if it’s a car or a charger issue. Mine only does it when the charger tries to issue a ‘new’ charge to the car the following day and my car has to be at the pre-programmed limit. Eg if the car is at 80% and has 80% limit in pivipro, but the car is still plugged in from yesterday and the Ohme tries to trigger its default 50% by 6am the next day, then the car will accept it.

on a seperate note, my other car which is a VAG does exactly what your iPace does but at random times, it’s definitely to do with opening and closing the doors and it somehow turns the car’s timer off and it starts charging straight away.

 

[Jon2Jags]

I don't ever use another charger, I only ever need to charge at home.

The problem is that the Pivi-pro charge setting is changed from 85% to 100% and I have to set it back to 85% otherwise it would, from then on, always charge to 100%

I would not expect any charger to be able to change settings in Pivi-pro.

My assumption is there is a bug in the car's software somewhere which changes that setting under a certain combination of circumstances, eg opening the boot when the charger is plugged in scheduled charging is enabled and the car is waiting for low cost hours to come around.

It has not happened again in the 4 days since Pivi-pro was updated to 4.3.1.

 

[Globalste]

Sounds like it started when they changed the API, or that's when people noticed it... It does annoy me that the car has to be unplugged to set the charge limit, but more so that they removed it from the remote.

https://www.i-paceforum.com/threads/forgets-ignores-charge-limit.8719/

 

[uwjorile]

Could it be related to the Wi-Fi connection being interrupted? This or the router usually turns off once a day (mostly at 11:59 PM). We also had the problem when the cat was on the power overnight.

 

[Jon2Jags]

I'm afraid it's not that.

Even though the Pivi-pro software car has been updated recently it still happens. I tested it again and opening and closing the boot when plugged in to the charger actually changes the set charge limit from 85% to 100%. We've learned to live with it. It's just one of the softwares idiosyncrasies - there are worse things that could happen.

 

[GuitarNutMyke]

I've had my 2023 HSE for just under two weeks but only had my Octopus supplied Ohme Home Pro charger for 3 days. I've noticed the same behaviour with the charge limit being reset to 100% even though I've yet to use the "one time" option at all. I'll check the version of Pivi Pro, but it should be whatever the latest was 3 weeks ago when the dealer was prepping the car. I'll try to do some testing over the next few days to confirm if it's the boot opening that's responsible in our case too.

 

[mat487]

Same for me: MY2023 and with podpoint charger. If I unlock the car (not just the boot) once the car is plugged in and set to charge during low cost overnight hours, then the 80% charging limit set in Pivi Pro can tend to revert to 100% - has done this for the 18 months I have owned the vehicle, throughout the various software updates.

Also I * think* that if I lock the car when not plugged in, then plug it in later for delayed charging (and I don’t unlock or open car) then the limit can be cancelled also. The software appears not to like when it is forced to wake up…

 

[Big Dunc]

The same for me. Highly annoying but I have learnt to live with it.
A 7kW /32 Amp single phase charger puts in about 7.5 % per hour. I set the timer on the charger such that it puts in about the right amount.