Battery Degradation Collected from a Range of Ioniq EV 28kWh Owners: The Results

[@evdabbler]

For results from more Ioniqs, also check out the updated video kzbin.info/www/bejne/jHy2lomFgr-Gjdk If you submitted results to this study and want to understand where your battery health stands, you can use this quick calculator replaying back your own data bit.ly/4dhTPRU

[@smartismartsmart91]

Can you change the sheet to km and kWh/100 km?

[@evdabbler]

@@smartismartsmart91 this is the drop down selection at the top.

[@Nikoo033]

Tried it on Safari and Firefox, can’t seem to be able to edit the input cells. 🧐

[@evdabbler]

@@Nikoo033 can you not save your own copy then make edits?

[@Nikoo033]

@@evdabbler nope, can’t see any menu bar or anything at the top.

[@SICHTKRAFT]

Thank you again very much for doing this! I just shared your video in the degradation thread of the Ioniq Forum. It was actually quite stressfull to drive down to such a low state of charge... so I am kind of proud that I was among only a few that were brave enough :-D

[@evdabbler]

Ah ah well done for pushing the boundaries! And thank you

[@robertpopek6063]

Thank you for doing this! Great analysis, even the were surprisingly fue participants. It's s unique owner information what to expect regarding battery degradation on the Ioniq. Thanks for your effort!

[@evdabbler]

And great idea in the first place, many thanks. Hopefully we'll get some more submissions on the back of this update. We shall see.

[@FFVoyager]

Have you seen Bjorn's review of an old Ioniq posted this morning? (Title - 'Hyundai Ioniq 28 kWh battery degradation after 162k km')

[@evdabbler]

No I have not (yet). Interesting timing...

[@arthimodo]

Good information, thank you! Finally someone, who doesn't read out the stupid Hyundai SoH value from the car, which is only a state of balance, as far as I know. Because it always recovers, if you charge to 100% from a deep state. One more data point: Rougly three Years ago (March, 20th, 2021), my Ioniq from Dec. 2018 reached 24,5kWh from 100 down to 3%. The battery temp. was between 25 and 32°C. My driving style was mostly 100km/h gps, as smooth as possible (132wh/km. The car had driven 60636km.

[@evdabbler]

Thanks and yes state of health tells us not very much at all.

[@d4nj0d8]

Very nice presentation of the results, thank you! I'm planning to measure the capacity following your method today 😊 I bought a used Ioniq a month ago and am curious to see, where my battery stands compared to the datapoints submitted...

[@evdabbler]

Excellent! Enjoy the Ioniq.

[@piscario75]

0.3% degredation per 10000km correlates to what i have measured in my 38kWh Ioniq as well after 4 years and 70000km. Even with this becuase its so efficient you really dont get any range drop even on long trips. Can still get 260km easily even on coarse outback roads at speed and get 350km in the city spring though to autumn. Our GOM was recently 406km before i ruined it with a country trip.

[@evdabbler]

Thanks for sharing

[@rogogreentooth5691]

Great video! Thanks for the effort it was absolutely worthy, is there any telegram group to join in with the ioniq users ? Cheers from Chile

[@evdabbler]

Thanks. I am only familiar with the ioniq forum. www.ioniqforum.com/

[@nakfan]

Amazing video and work 👍 Subscribed... BR, Per (Denmark)

[@evdabbler]

Awesome, thank you!

[@smartismartsmart91]

Thank you for the test, and letting me participate in it. How can i get my individual results?

[@evdabbler]

The issue of trying to keep individual submissions on an anonymous basis :-( Can you see your submission(s) at 01:03 and cross-reference at 06:16 and 07:25? Also if you happen to be outside the UK that should make it pretty obvious where you are!

[@smartismartsmart91]

@@evdabbler Yeah, thats the problem i thought of.

[@lookoutleo]

I was thinking of a ioniq 28 as replacement to my my 2016 leaf 30 , what should I look for? My leaf has 129000 miles and battery only realy good for about 80 miles range in summer . I drive like miss daisy so manage about 4.5 miles per kwh

[@evdabbler]

As you can see you're unlikely to get a bad pick if you go with the Ioniq 28. Take a look at the history for miles/kwh then look at range at 100% the latter divided by the former should give you a sensecheck of whether you get 23kWh or more. Ideally drive the car from 100% and use this protocol to compare. Ask the previous owner (if possible) how often and how long for they left the battery at 100%.

[@lookoutleo]

@evdabbler it's difficult to do all these things as I'm up in Scottish Highlands so will prob have to buy as a leap of faith like I did with leaf nearly 4 years ago thankyou for all the info on the 28, it would be big upgrade on leaf by the looks of things . What is story with the 38, are their many differences?

[@evdabbler]

@@lookoutleo ioniq38 may be a great pick. Obviously more range which may be helpful for scotland, similar efficiency, better screen/infotainment, remote app. I suspect batteries are going to be good too. Big drawback is rapid charging for long distance trip. If you regularly travel say to england or beyond, harder to recommend over the 28.

[@lookoutleo]

@evdabbler doesn't the 38 have same charging option to the 28?

[@evdabbler]

​@@lookoutleono charging speed is capped much lower on ioniq 38

[@rusty911s2]

Excellent stuff: very interesting, even though I don't have an Ioniq myself.

[@evdabbler]

Thank you!

[@gregmcphail7618]

Really wish that this video and data can be updated. I've added a few capacity tests for my IONIQ with over 200,000km. It would be nice to see how this new data ties in with the previous data

[@evdabbler]

Thanks for your inputs. There is more since but did you see this update already? kzbin.info/www/bejne/jHy2lomFgr-Gjdkfeature=shared

[@stajpi]

goddamnit two years ago i didn't have enough money for ioniq so i bought egolf 20kwh. car is great, very very happy with it, but any trip gets nerve wrecking... ioniq is amazing

[@evdabbler]

Times have changed indeed. Reasonably low mileage Ioniq 28s can be had for c£10k-£11k in the UK, barely more than 35kWh Golf. Both make EV mobility desirable and accessible.

[@JUDGEmoreDollars]

It nice to see that someone is collecting and presenting the data, but the data is lacking some information regarding: drive mode selected, daily average distance, speed driven and convenience features used, road elevation.

[@evdabbler]

As you will have seen. We had little correlation between parameters recorded and little variance between cars. Also the sample is now higher but still limited. I doubt we'd be able to link any of these parameters to degradation. That's assuming they're constant, eg I'd expect people to change drive modes, drive one day in the city and the next on the motorway etc...

[@bobz1736]

Should you have recorded the type of charging for each car?

[@evdabbler]

Possibly. I am assuming multiple owners by now on these cars so unlikely to have a clear history. Also I suspect this would be hearsay "i feel like I am charging 50% on DC". I would fully expect everyone other than me to have better use of their spare time than keep detailed records :-)

[@bobz1736]

@evdabbler - OK. From other testers, I understand charging type can have the greatest effect on battery life...

[@evdabbler]

Ok I have added the question for future submissions

[@paulgoudfrooij6561]

Nice work! Did you check how much DC fast charging was done by the various folks? I’m wondering if there is a relation between number of fast charges and remaining battery capacity, as seems to be suggested by various sources.

[@evdabbler]

Thanks. I have added this question to the form for submissions made after this video.

[@JenniferChybalski]

I noted a distinct drop off when I changed all the tyres to Uniroyals. I needed to change the tyres and that was what was available at a local car tyre retailer. Later I found out that Uniroyal tyres are not the most energy efficient on the market but they are very safe in wet weather. I see it as a trade off for now but I will make sure I go back to more energy efficient tyres next time. Before the tyre change I saw little in the way of reduced range over the years to suggest the battery was degrading in any way whatsoever. I got the impression that the change of car tyre has reduced my range by about 3% literally overnight. Having said that, recently I drove 193 miles at 5.1 miles/KwH on a sunny spring day and a lot of that journey was on motorways at 70 mph. I have driven 71,000 miles (approx 114,000 km) so far and think that performance is still pretty good. Mostly I charge at home using a 7kW wall-box but use DC rapid chargers when I have to on longer journeys to top up the battery.

[@evdabbler]

Good stuff sounds like you have the Ioniq 38 then

[@WelcomeToDERPLAND]

Ah- I wish I knew about this so I could have participated, Bought an 2017 Ioniq with 100,000~ miles in California about a year or two ago- it now has 145,000~ miles on it right now- and while I havent specifically charged to 100% (I always fast charge DC and usually it automatically ends at about 93~95% or I take it out early)- It always reports 120~140 miles at that % of 90~98%~ It seems to be fairly accurate with its estimates, and I manage to drive it at 5.0~7.0 mi/kwh regularly- avoiding high speed zones like Freeway/Highways of course.

[@evdabbler]

@@WelcomeToDERPLAND thanks. The form is still open and getting more submissions. Also you can play on the ongoing efficiency game (see recent video)

[@davidniquot6423]

Now let's do the same with the 38kWh to see if the battery techonolody is really worth ...

[@evdabbler]

@@davidniquot6423 The submission form is open for all cars now. Unfortunately little data submitted besides for Ioniq28

[@samyrichet5913]

I would like to participate with my old Ioniq but I sell it in January. But I just buy another Ioniq from 2019 with 220000 km. I will make the exercise and submit my result, I hope, this month

[@evdabbler]

That will be good. In fact you might do that test (or get the seller to do it) before your purchase at 220k km :-)

[@samyrichet5913]

@@evdabbler I buy it for a low price (same price as a leaf 1). So the battery degradation is not really important

[@samyrichet5913]

I published my result this morning 😊

[@evdabbler]

@@samyrichet5913 Merci! Much appreciated. And not looking bad for a 220k km car either! Would be great if you can submit another one or more readings later so we validate the consistency of outcomes for this particular vehicle.

[@samyrichet5913]

Yes I not bad ^^, the car was never done fast charging before I buy it.Ok no problem. I will try to submit when I will made long trip. I planed to make road trip to Morocco at the end of april month. If you want I can collect data for you of this trip. I have an obd link and different app to read data from the car. Just if you can give me the process to record it and I can send you back the saved data when I come back to France

[@decimal1815]

Interesting! I bet the car still reports 100% SOH..?

[@evdabbler]

Yeah probably for most but not that relevant or something folks would do without OBD

[@Nikoo033]

While the method used here is valid, I suspect that it is a bit pessimistic compared to the actual remaining capacity. Nothing wrong with that, better to be conservative. On the day I collected the data submitted to your study, I did a rapid charge with zero losses which returned a capacity of 26.34kWh, compared to 22.56kWh reported here (“user 6” 😉). Does not change the fact that the pack of the Ioniq28 has a low degradation rate. Your calculations report 0.29% per 10000 km, let’s say annually. My own show about 0.25% annually so quite similar.

[@evdabbler]

What I like about this method is that it just tells you what is truly usable. In many ways this is not a battery degradation test but an energy range capacity test (?!). If you re prepared to use 90% of the battery how many miles for a given efficiency is still in your battery. This is why using 26.5 or maybe even 26kWh is probably the right number for "new" as opposed to the namesake 28.

[@Nikoo033]

@@evdabbler I know. I agree it is more realistic in a way since it refers to what we would actually use in a trip at best. But you’d be shot at by the marketing teams of most EV manufacturers 😂

[@Nikoo033]

Interesting timing, when a similar video was released for 100 thousands of Tesla EV: kzbin.info/www/bejne/noXXY5-fl7RgrK8feature=shared However the analysis was not as deep as yours 😉 Interesting they’ve shown a similar level of degradation: ~10% at 100k miles. Now I have got to remember which user I am in all this 😂

[@evdabbler]

Thanks for pointing out. Have just skimmed through now, looks like a whole different scale of input indeed!

[@roberts.wilson1848]

The problem is the utterly garbage battery size. There should be retrofit options to a 50kwh size, because that is what is mandatory fior this size vehicle, and not 28.

[@Nikoo033]

😂 nah, for the UK, 28kWh rapid charged to full in 22-24 minutes and the average annual efficiency of the Ioniq (4.5 miles/kWh) are absolutely fine. A bigger pack would make it less efficient, as shown by the fact that the 38kWh Ioniq is slightly less efficient.

[@florentcoste]

​@@Nikoo033 only 10% less efficient. 38kwh battery problem is more speed of charge

[@Nikoo033]

@@florentcoste yup

[@piscario75]

​@@florentcostecan't say we notice any less efficiency in our 38. City driving mostly so the slow DC charge evry once in a while is an ok trade off as disappointing as it is. We easily get below 10kWh/100km or above 6mi/kWh in our normal commutes