80% charge

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denopa
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Joined: Sun Sep 06, 2020 6:57 pm
Location: London UK

80% charge

Post by denopa » Sun Sep 06, 2020 8:02 pm

Hi all,

First post here, just picked up our 2019 First Edition on Friday, already having a lot of fun with it! I used to have a convertible XK before we had kids, it’s been BMWs since then, what was I thinking :lol:

I see a lot of reference to 80% as a charge level not to exceed, for example in the pinned topics (super useful), but where does that number come from? What happens if I charge to 100% once every couple of weeks and use that bit by bit for my commute ?

I tried searching but the tool doesn’t accept “80%” as a search term (too short), so I apologise for asking for info which most likely already exists.

ChrisMc
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Location: North West

Re: 80% charge

Post by ChrisMc » Sun Sep 06, 2020 8:22 pm

I've been away this week, I have charged to 100% 6 times in 7 days, I wouldn't worry about how many times you charge to 100% JLR certainly have said its no problem for the batteries. In fact what is far worse is leaving it for long periods at a very low SOC.

Just charge how and when you see fit and enjoy the car, don't fret about stuff like this.
MY20 - I Pace HSE EV400 Black, full black pack, Mars Red Windsor leather sports seats, gloss black 20” wheels etc
InControlTouch Pro: S20A_20.16.5-536345 Telematics: Was 14.2 Now 16.2 - H228, H264, H270

HSE
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Location: UK

Re: 80% charge

Post by HSE » Sun Sep 06, 2020 8:28 pm

Charging to full every couple of weeks should be no problem whatever. 1000 cycles would take forty years of that, and I think 1000 full charge cycles is well within the capabilities of the Jaguar batteries. I think the only real no-no is to leave the car on charge for weeks, or god-forbid months. JLR advise long term storage at below 60%. Personally I like to leave mine at 80% or less (but above 40%) if I am not going to drive it for a couple of weeks, but that is only because I am trying to give the battery the very best chance of maximum longevity, and my caution is probably unnecessary.

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Koala
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Location: Germany - Bavaria

Re: 80% charge

Post by Koala » Sun Sep 06, 2020 9:01 pm

There is nothing wrong with charging to 100% on a regular basis. However: If you do fast DC charge on a longer trip (> 50kW), it is good practise to charge to 80% only, as the last 20% would add extra stress to the battery. The charge rate will also drop dramatically beyond 80% SoC, so you would be wasting you time either.
EV400 S, MY2019, Firenze Red, Light Oyster Interieur, Acitve Air suspension, 18" Diamond turned Wheels.
Infotainment-Software: S20B1_20.30.2-578440| Telematics: 17.2 | 45.000 KM of happy I-Pace driving since March 14th, 2019

TheDeuce
Posts: 38
Joined: Tue Jul 28, 2020 10:50 am
Location: United Kingdom

Re: 80% charge

Post by TheDeuce » Sun Sep 06, 2020 9:50 pm

I suppose it also depends on how long you intend to keep the car and whether or not it's leased...

As EV's start to hit the used car market in greater numbers will it be possible for people to check the recharge trends of the battery? Or even just a battery healthcheck? Such a thing could wipe £5-10k off a cars value in extreme circumstances I guess.

On the other hand if like me, and my business partner, your cars are leased... It's sort of a non-issue isn't it? On a lease car the battery just needs to survive 2-3 years without losing too much capacity to remain a useful car. As has always been the way with lease cars - look after the bodywork but don't worry too much about looking after the power plant because you're never going to have to live with it and it will always be under warranty.

If you're looking to re-sell one day, or simply want the car to last for a good while, probably best to follow Jag's 'ideal' charging regime as much as possible. They aren't giving the advice for the sake of it.

denopa
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Location: London UK

Re: 80% charge

Post by denopa » Sun Sep 06, 2020 10:20 pm

Thank you for the useful and fast answers, may I ask where I can find JLR’s guidance ? iGUIDE doesn’t seem to have anything there.

Is there also a way to keep up to date on incoming software releases and features ?

Abu Dhabi Dude
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Location: United Kingdom

Re: 80% charge

Post by Abu Dhabi Dude » Mon Sep 07, 2020 12:08 am

denopa wrote:
Sun Sep 06, 2020 10:20 pm
Thank you for the useful and fast answers, may I ask where I can find JLR’s guidance ? iGUIDE doesn’t seem to have anything there.

Is there also a way to keep up to date on incoming software releases and features ?
You cant find the guidance because Jaguar don’t give any. Basically, Jaguar themselves say this is a non-issue. They recommend getting home every night and plugging in back to 100%. However, many people (myself included) play it cautiously and stick to generally accepted good practice for Lithium batteries, which is to avoid charging to full unless you need to for a long trip. However, many people do not bother and so far there has not been a huge number of people complaining about degradation. Personally, I’ll stick to charging to 80 unless I’m planning a long trip the next day. But I am possibly being overcautious.

The other reason you will see a lot of talk about 80% is that the car will charge at a good speed up to 80% on rapid chargers (CCS). Above 80% the charging speed slows, so most people will charge to 80% and then move on as it reduces the overall journey time.

With respect to the comments about it not mattering for a lease vehicle though, I’d just like to add that if carbon footprints matter to you, then it is worth looking after the battery regardless as the better you look after it whilst in your care, the longer it will last and therefore will reduce the carbon footprint associated with the vehicle’s lifetime.

electric beagle
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Re: 80% charge

Post by electric beagle » Mon Sep 07, 2020 12:13 am

Abu Dhabi Dude wrote:
Mon Sep 07, 2020 12:08 am
denopa wrote:
Sun Sep 06, 2020 10:20 pm
Thank you for the useful and fast answers, may I ask where I can find JLR’s guidance ? iGUIDE doesn’t seem to have anything there.

Is there also a way to keep up to date on incoming software releases and features ?
You cant find the guidance because Jaguar don’t give any. Basically, Jaguar themselves say this is a non-issue. They recommend getting home every night and plugging in back to 100%. However, many people (myself included) play it cautiously and stick to generally accepted good practice for Lithium batteries, which is to avoid charging to full unless you need to for a long trip. However, many people do not bother and so far there has not been a huge number of people complaining about degradation. Personally, I’ll stick to charging to 80 unless I’m planning a long trip the next day. But I am possibly being overcautious.

The other reason you will see a lot of talk about 80% is that the car will charge at a good speed up to 80% on rapid chargers (CCS). Above 80% the charging speed slows, so most people will charge to 80% and then move on as it reduces the overall journey time.

With respect to the comments about it not mattering for a lease vehicle though, I’d just like to add that if carbon footprints matter to you, then it is worth looking after the battery regardless as the better you look after it whilst in your care, the longer it will last and therefore will reduce the carbon footprint associated with the vehicle’s lifetime.
The weird thing is that far cheaper devices (from tablets, to phones and laptops) have software that actively manages charge to avoid hitting 100%. My fairly new Lenovo Android tablet seems to be designed to limit charge to 60% in most scenarios (which works pretty well given the run time I get from that). You would expect the car to manage this too at least periodically to avoid fully charging every cycle rather than relying on manual intervention.
Delivery October 2020 21 HSE, Portofino Blue, Oyster interior, Wireless Charger, Cupholder Covers, Active Air Suspension, Adaptive Dynamics, Clear Sight rear view mirror, Panoramic Roof, Privacy Glass, Upgraded Cabin Lighting, Aluminium trim

Abu Dhabi Dude
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Re: 80% charge

Post by Abu Dhabi Dude » Mon Sep 07, 2020 12:24 am

electric beagle wrote:
Mon Sep 07, 2020 12:13 am

The weird thing is that far cheaper devices (from tablets, to phones and laptops) have software that actively manages charge to avoid hitting 100%. My fairly new Lenovo Android tablet seems to be designed to limit charge to 60% in most scenarios (which works pretty well given the run time I get from that). You would expect the car to manage this too at least periodically to avoid fully charging every cycle rather than relying on manual intervention.
The car effectively does this by having a top buffer on the battery. You can never actually charge it to 100%. The best you can do is charge it to about 94% of its total capacity, so you are never taking it to its actual full capacity. Also, the active thermal battery management provides a lot of protection. However, that is only active while charging and driving so has no benefits when leaving the car parked for long periods while fully charged.

hml
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Location: United Kingdom

Re: 80% charge

Post by hml » Mon Sep 07, 2020 7:50 am

Mine shows 100% when I charge it. I charge over-night when the car is down to 20% - 30%. The frustrating thing is that it appears to only give me 230-240 miles on a full charge
Blue SE. 22" wheels, pano roof MY2020 (arrived November 2019)

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