Battery Health Status

We are trying to find out what handling is the best for our batteries, thus we are happy about each costumer that gives a feedback about his car.

NicknamePurchasedBattery
Health
Status (%)
Date measuredCharges
per week
Charging
power (kW)
Charging
place
Km (x1000)Car
Fesch2013.051022017.012-33,7closed garage28Zoé
Daniel2013.08892015.102-443open carport21Zoé
Jeroen2013.11912015.1073,7open30Zoé
Jesper2011.11972015.102-33,7openZoé
Rémy2011.12842015.102-43,7open39Fluence
Andy2013.10942015.101-27open19Zoé
Berndte2013.031022015.105-722-43open47Zoé
Tor2015.041002015.105-711open12Zoé (Q210)
Ole2015.061002015.107-153,7 & 22open carport22Zoé
Sandy2014.06982015.101.5-27 & 43open13Zoé
Sandy2014.06902017.011.5-27 & 43open17Zoé
Sandy2014.06882017.051.5-27 & 43open26Zoé
Sandy2014.06852017.051.5-27 & 43open27Zoé
Fer2015.05872015.106-79.0closed garage12Zoé (Q210)
Fer2015.02912015.106-74.6closed garage18Zoé (Q210)
Tho2013.06932015.107-1011-43open25Zoé
Ritxi2012.02782015.105-73.3closed garage66Fluence
Henrik2014.051052015.102-42.4open18Fluence
Fivari2013.121012015.1126.5closed garage28Zoé
Schouf262013.031022015.11722open garage74Zoé
Jimbo2014.11992015.113-43.6carport10Zoé
mmezo2014.061022015.111-23closed garage4Zoé
mmezo2014.061022015.1123closed garage6Zoé
Sten2013.06922015.111-27 & 22open carport21Zoé
ener732013.061022015.124-57.4 & 22closed garage62Zoé
Arthur2013.07892015.121-311-22open carport27Zoé (Q210)
Crf2015.121052015.1272open carport2Zoe (R240)
Crf2015.12842017.0772open carport39Zoe (R240)
GertjanVB2013.10892015.123-73.7open44Zoé
JoDa2014.06922015.12611closed garage27Zoé
cece742013.04862015.1263.7closed garage51Zoé
Claude2013.05862016.012-311closed garage32Zoé
Tim2013.09892016.012-37 & 43open52Zoé (Q210)
Tim2015.091002016.012-33.7, 7 & 43open9Zoé (Q210)
Grejazi2014.061092016.027-212.3 & 3.7closed garage / carport19Fluence
THellweg2014.08942016.025-722open35Zoe (Q210white)
THellweg2015.12962016.025-722open11Zoe (Q210black)
Alexc2013.12862016.021-222open50 Zoe (R240grey)
lingley2013.06852016.023-72.4-43closed garage42Zoe (Q210)
Kai2013.06842016.033-59, 22 & 43open carport45Zoe (Q210)
Kai2013.06862016.123-59, 22 & 43open carport54Zoe (Q210)
beatus01.2015982016.035-714-4310Zoe (Q210black)
decalco2013.031022016.036-76.4 & 22open56Zoe (Q210)
most2016.021052016.032-522open2 Zoé (R240)
JBS-EP Tender2013.031022016.053-47open (near Paris)49Zoe (Q210)
bene2015.10962016.105-622open23Zoe (R240)
Claude2013.05842016.102-311closed garage40Zoé
Bernd2014.12722017.013-522open carport17Zoé (Q210)
Claude2013.05822017.012-311closed garage41Zoé
Lorenzo2014.10812016.0922openZoé
Fidelio2013.031022017.013-422open72Zoé (Q210)
Grejazi2014.061012017.037-212.3 & 3.7closed garage / carport40Fluence
FrancescZOE 2013.10862017.051-24.6closed garage38Zoé (Q210)
evzone2015.06802017.0532.3carport18Zoé
Bruce 2015.05942017.051-27closed garage5Zoé (Q210)

If you want to contribute, please leave a comment in the current post with all relevant information. I will then integrate it into the table and delete the comment.

For reference only, here a table that indicates the settings for the given charging power.

Power (kW)PhasesCurrent (A)
3.3115
3.7116
4.6120
7132
9313
11316
22332
43363

About the Zoe battery

The Zoe has a 26 kWh battery pack (rated capacity), see this document, page 60: 12 modules * 16 cells * 3.75 volt * 36 Ah = 25.92 kWh. However, it’s life would be severely shortened if using that capacity. The BMS caps the capacity by roughly just under 10% on both the charged as well as the discharged end. This saves a lot of battery stress but reduces the capacity to a usable 22 kWh. If you want to know more about how these type of cells should be treated, here is a good link.

60 comments on “Battery Health Status
  1. Jeroen Meijer says:

    May I suggest another keyword? A factor of importance might be the general cycle depth. My car for instance is always charged at night, but often runs only a few 10ths of kilometers a day. I would call that “shallow cycle”. People doing a 95 km one way commute every day, charging at work, I would call that a “deep cycle”. Word in the street is that deep cycles are a bit better for SOH.

  2. Sandy says:

    Can the app show the next decimal place in a future release?

  3. Alexandre Moleiro says:

    Using field “0x7bb, 80, 87, 2, 1, 0, 10, Bat SOH%3ld.%01ld, %, 0x2161, 0x6161, , 1, 0, 0\n” it is possible to get 0.5% precision, like 90.5 91.0 91.5, but no more than that.

    You can also compare health by Capacity in Ah, but it’s not Renault’s official measure for battery changes.

  4. stiloboy says:

    Cheers Alexandre, I was wondering if my battery was closer to 99% SOH because I can get really good mileage.

    One thing I have noticed with the software (while testing a 43kw post) is that it still says 1 phase even though its a 3 phase connection.

    I’ve already been able to evidence a brand of charger (evolt) which is held back to 17kw when charging on AC instead of (siemens comparable) 40.4kw (on an equally low SOC battery).

    Great software, keep up the great work.

  5. Jeroen Meijer says:

    You can easily see if the charger is holding back or the car is. “Available charging power” is what the charger is stating as max. “Max battery charge/regen” is what the car can absorb given the SOC, temperature and maybe some other black magic. Some fast chargers, even wehn not load balancing with other cars being charged, have a nasty habit of starting low and then slowly “turning up the volume”. This is rather “not done” IMHO when you have to pay by the minute.

    Some people suggested to crowd-sticker chargers “checked by CanZe: xx kW”, hehe.

  6. Jeroen Meijer says:

    AFAIK Tesla and Nissan state their capacities in rated kWh, while Renault is “too honest” and states usable. In all fairness, in the Tesla you can “emergency use” most of that excess with a manual override.

  7. STEN says:

    Hallo Zusammen,
    hier die Beobachtungen zu meiner ZOE.
    Gekauft 06/2013.
    06/2013 0km 100% (Hoffentlich)
    07/2014 13400km 98% Renault Batteriereport
    12/2014 18800km 96% iCarsoft 907
    02/2015 21150km 96% iCarsoft 907
    04/2015 23960km 94% iCarsoft 907
    10/2015 31263km 92% iCarsoft 907
    Ich lade 1-2 mal pro Woche meist mit 22kW. Im Sommer lade ich mit 7kW
    wegen des Lärms der Klimaanalge zur Batteriekühlung. Der Wagen steht immer in einem offenen Carport.

    • Jeroen Meijer says:

      Thank you for your data Sten. Here is a tip: If you put your car in ECO mode before switching it off and then connect your charger, the fans will not kick in (or much, much later)

  8. seppele77 says:

    My data:
    ener73 2013.06 102 4-5 22 – 7,4 closed garage 62 Zoé

    • Jeroen Meijer says:

      That is insanely good!

      • seppele77 says:

        I have some doubts on this SOH value… Why many users have exactly 102 SOH ?? Is this value reliable?

        • Jeroen Meijer says:

          You are completely free to have doubts. Feel free to cross check with an i907 or your dealer.

          • FYI iCarsoft 907 will set you back about £120 for Zoe. 😉 You guys should be at least token charging for your CanZe its that good.

          • Jeroen Meijer says:

            Thanks for the heads up and most appreciated 🙂 We have discussed this amongst us just a few days ago. While we most certainly do not dislike money, there is a feeling that for the probably relative minute amount that would come in, the risk of getting into an argument about it is simply not worth it. Maybe we will change our minds 😉

  9. Grejazi says:

    For remark:

    Datas were taken after using the whole capacity-range of the battery for min. 3 times because of having some long runs to handle.

    When using only 50% of capacity-range for a longer time the datas for capacity is still smaller. I think the BMS can only calculate a correct capacity when discharging the battery down to warning because the discharging curve is not linear….

  10. THellweg says:

    Hello team,

    here are the current health states of our two Zoe cars.
    THellweg – 2014.08 – 94% – 5-7 – 22kW – open – 35tkm – Zoe (210white)
    THellweg – 2015.12 – 96% – 5-7 – 22kW – open – 11tkm – Zoe (210black)

    Remarks:
    The white car was ordered as a new car so its manufacturing date will not differ much from the purchase date.

    The black car was purchased in december 2015 with a mileage of 7tkm already driven – but it is a 2013.05 model.
    Here are the details:
    Before we bought it the car was used as a demonstartor and rental car (for customers) by the car dealer.
    It´s real fabrication date is 2013.05 (the problematic period) and indeed – serious charging problems occured after some time.
    Therefore the car dealer installed a new motor, a new charger, a new batterie and an new TCU in 2015.05.
    We were told that the displayed mileage of 7.4tkm is from the period 2015.05 until 2015.12 when we bought it.
    The batterie health was displayed with 98% in december until it decreased some days ago from 98% directly down to 96%!
    I drove 3.5tkm with it from the end of december till mid-february and charged 5-7 times/week with 22kW.
    This is the same mileage than before with the white one that is now driven (with fewer mileage, 1.2tkm/month) by my wife.
    I was surprised that the health state jumped down 2% at once and now I´m concerned that the health state will continue to decrease so rapidly. But most confusing of all for me is that I see a lot of cars in the list with more than 100% health state.
    Maybe this health state parameter is made of 50% “black magic” !?

    All the values are taken with CanZE.
    Thank you for this great software product!
    Cheers,
    Thomas

  11. Hi Jeroen and all team,
    thanks for the very useful app. I even bought a cheap Android tablet for it (and only it) and love using it on longer travels. I love especially the consumption screen. Now, since you’ve announced that Frédéric is building up CanZE for iOS I just can’t wait to have an early alpha installed and tested. The WiFi dongle is already on it’s way from China… 🙂

    Thanks,
    keep up the excellent work!
    Matthias

  12. stiloboy says:

    My pack dropped from 96% on 15th to 91% on 17th. 🙁

    • JBS says:

      Are you making frequent shallow charging ? (typically every night)

      • stiloboy says:

        Not really. I tend to charge twice a week, although it’s a full charge from low SOC.

        I’ve also go on long trips occasionally which may need 10 rapid charges.

        Having dropped to 91% it’s now recovered to 92% and seems to be staying there.

  13. JBS says:

    Rapid is 43 kW ? How many such long distance trips per year ?

    Seems the SOH estimate is not necessarily reliable: I’ve been reading of a test with 75% SOH and still 22 kWh available when actually making a trip (in spite of 17,5 kWh capacity announced).

  14. stiloboy says:

    Maybe only 2-3 a year, but as much as 500miles at constant 70mph (other than stopping for charge)

    My car now shows 21.6kwh but I just covered 122.6miles on a single charge and yet I used 23kwh (no charge top ups).

    My actual regen per charge now seems to have gone up a lot too. Used to be 1kwh per 22kwh but now more like 4kwh per charge as regen.

  15. Rémy says:

    The battery of my Fluence ZE which was at 84% SOH last year is now at 76%.

    It was 75% in july, but … I did not used the car for a dozen of day this summer and the SOH came up to 94% .
    It took three weeks and more than 500 km to go back from 94% to 76%.

  16. Lorenzo says:

    Hi to all,
    i’ve buy my Zoe in 10/2014. Now it’s 81% of SoH. It’s ever charged with a 22kw external charging station. In the winter the temperature drop below -10 celsius degree.
    Lorenzo

  17. Kay says:

    Hi to all.

    I was doing a research on the Zoe.I am curious to know how you all are able to tell the Battery Health Status?

  18. Bernd says:

    I would like to add my data as well:

    Zoé (Q210 with 43 kW charger) purchased Dec. 2014; now 17500 km; typically charged in an open carport with 22 kW, 3-5 times a week.
    SOH Level is at 72% now.

    Ist the SOH Level critical (battery is coming to an end) or directly linked to the temperatures we have currently (-10 °C in southern Germany)?

  19. Bernd Ziegler says:

    Thanks Bob,
    That’s what I already did. But the usual dealer can not help. I have to contact an authorised ZE station to verify the status. But the next one is not around the corner

    • Bernd Ziegler says:

      Hi Bob,
      Just to give a short update on what happened meanwhile.
      I came in contact with the next authorized ZE station (Bellemann, Speyer) and they performed very well. They confirmed the SOH value and managed the BMS update.
      Now, the SOH is 99% and I am enjoying 40 km more to drive.

      Thanks to you and the team for programming this nice CanZE tool.

      Greetings
      Bernd

      • Francesc Signes says:

        Hello Berd. My question is, the BMS firmware could give you 40km more of track ? incredible. DO the EV dealer advise owners to update it? it is done on regular revisions ever year?

        Salute from spain
        Francesc

        • Bernd Ziegler says:

          Hi Francesc,
          Greetings to Spain.
          Yes, after the BMS update I was able to (re)use the full capacity of the battery which result in 40 km more driving range (compared to the previous level; not the conditions I had when purchasing my ZOE).
          Prior doing the update the dealer had to ask Renault for authorisation. Any kind of update looks like an individual activity. No general announcement from Renault to ZOE owners to do the update known.

          Best regards

          Bernd

  20. Harm says:

    Hi Bob, I am making charts of this data. Is it possible to add the date when measured to this table?
    See: http://www.renaultforum.nl/forum/batterij-gezondheid-meten-t20004-275.html#p171137

    Many thanks, Harm.

  21. Fidelio says:

    Hello, i would like to add my data, too. Although i´m not sure, if the SOH is correct (read with CanZE and Maxi Scan 902):

    P: 2013/3 SOH: 102% DM: 2017/01/30 CpW: 3-4 CP: 22kW CPlace: Open KM: 72 Car: Zoe (Q210)

  22. Grejazi says:

    Grejazi – 2014.06 – 101 – 2017.03 – 7-21 – 2.3 & 3.7 – closed garage / carport – 40 – Fluence

    Battery health Status update at 40.004km Battery temperature 30°C – after some longruns with discharging down to less than 20% of capacity.
    In January at 37.000km SOH=98%.

  23. Sandy says:

    I’m now down at 88% SOH with 26,000 miles on clock. But got car booked into dealer on 11th to see if the BMS update will restore lost health.

  24. Stephen says:

    Got my ZOE 2 months ago. SOH 80%. Just did a range test and achieved 181km. According trip report: Consumption 22kWh, saved: 2kWh = ca. 20kWh usable battery capacity

    Previous owner charged with most of the time with 2.3kWh, not known how often per week, the supposed data:
    evzone 2015.06 – 80 – 2017.05 – approx .3? – 2.3 – carport – 18 – ZOE

    The SOH seems somewhat low to me given the achieved range…and consumed kWh?

  25. Sandy says:

    Sandy here. SOH now showing 85% at 27k miles. Car is going into garage in 2 days for a hopeful BMS update.

    • Francesc Signes says:

      Hello Sandy, any good news on BMS update? To all other users, do you advise a visit to garage for this?

      • Jeroen Meijer says:

        From what I heard (but I am not sure this correct) Renault informed it’s dealers that the update should be applied if AND ONLY IF:
        – balancing (99% to 100%) takes a very long time;
        – battery degradation seems extremely fast

  26. Sandy says:

    Not yet. I used a new dealer, they had car 9 days and didn’t do a darn thing.

    Going to a better one on 20th as they were recommended by folk who had a successful BMS update.

    So I’ll report back around the 22nd hopefully.

    • Sandy says:

      Car is now back from the new dealer.

      CanZE tells me, at 98.3% SOC i’ve got 22.1kwh and SOH is showing as 98%. Pretty pleased with that.

      BMS and BMS (Safety) computers were both updated. Not check the BMS version yet, but will.

      • Francesc says:

        Thanks for report.
        I am in similar case. 39000km and 86-88% SOH.
        Do you advice BMS update?
        Perhaps a visit to ZE garage?

        • Sandy says:

          If you ask for BMS updates you likely won’t get it.

          Best to say your down on range and that it takes a long time from 99% to 100%

      • Sandy says:

        Now tested with a full 100% charge. I have 22.8kwh available with 0.6kwh for regen capacity.

        Very pleased with BMS update. My SOH is showing as 98%. So the same as my first report on this site, back in 2015. 🙂

        Car mid way through 28,000miles.

        • Francesc says:

          Really good. The question is. Does the car drives more km now?

          • Sandy says:

            So far only carried out a few shortish trips.

            With roofbars fitted I got 44miles on 11kwh. So it does seem range has increased.

            Roofbox fitted now so I’ll get an idea this week if range has increased, but I expect the roofbars and box to knock about 10miles off range.

  27. Crf says:

    My SOH update:
    Crf 2015.12 84 2017.07 7 2 open carport 39 Zoe (R240)

    • Bob Fisch says:

      Which makes 20% loss in 2 years and 37’000 km

      • Jeroen Meijer says:

        I think we can nullify this item. There is new software for the battery that completely changes it’s behavior. I’ve seen 20% jump of the SOH. There was obviously something not quite OK with the old firmware and I also think Renault dares to push the edges of the capacity a tiny bit more.

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