Zoe Battery failing already – or what is going on?

Home Forums Zoe News and Discussion Zoe Battery failing already – or what is going on?

This topic contains 8 replies, has 7 voices, and was last updated by  scoobystu2 3 years, 3 months ago.

Viewing 9 posts - 1 through 9 (of 9 total)
  • Author
  • #29472


    Hi there,

    I recently started using the charge scheduler to time my charges in the evening. The reason for this is that I want to try and reduce electricity costs by not charging up completely if I don’t need to. My theory is that by only putting in enough charge to bring me to and from work I will save a bit of money. Or so I believe, but anyway.

    I have noticed that on nights when I fully charge (currently Sunday night) I get to 100% and then the charge finishes, and I get the email from ZE Services telling me that charge has finished. However, if I don’t fully charge (as was the case this evening). I notice something very weird. When charge finishes, I get an email to say so, and it says that I have charged to whatever percentage. All normal. So this evening I finished charging at 76%, BUT when I went out 10 minutes later my charge level had dropped by about 9% to 67%! I have had to put the car BACK on charge for an extra 30 minutes or so.

    Any idea what is going on here? Why am I losing charge? Is it a sign that the batteries are starting to fail ALREADY (car is only 7 months old!) or is there something else happening?



    Mine behaves in exactly the same way, so I don’t think you have a problem.

    I usally always charge to 100% so the car balances, but on the odd ocassion I have just done a quick top up and I always notice the range drops quite a bit a short time afterwards from the range initially displayed after unplugging.

    Personally it costs so little to charge it up to 100% why not let its thing? The amount of electricity you are going to will be minimal. It costs me less than £3 for a full charge.



    Yep, agree with harters on that one, I also see that happen, conversely you can see charge % go up after leaving Zoe for a while after a long run etc.
    Would not expect your battery pack to be degrading yet, mine is now 19 months old and pack SOH is still at 98% checked just last night.



    My battery pack is at 84% after 2.5 years, I checked a few months back.



    Checked mine for the first time yesterday, battery is at 91%. Car will be 3 years old in early October.



    How do I check my own battery folks? I charged fully this evening by the way, haven’t checked yet but I assume it will still be 100% in the morning.



    I think you’re maybe looking for signs of the sort of degradation behaviour you’d see with traditional batteries, and hence getting confused. The Zoe – as with all modern electric cars – uses lithium ion batteries which don’t lose their ability to hold charge. When people talk about degradation, they’re referring to the loss of total capacity; hence, my (87℅) pack that would originally store 22kwh of electricity will now store a bit over 20kwh.

    Hence, the drops you’re seeing aren’t indicative of a battery issue. It’s probably just a difference in how full the car thinks the battery is at the end of a charge vs 10 minutes later when the pack’s settled. If you want to charge it to a certain (lower) level you’ll need to get a feel for the change and adjust charge length accordingly. Personally am not sure why you’re bothering though: doesn’t seem to have any obvious advantage, and by doing so you’re preventing the pack from performing cell balancing.



    To check state of health (SOH) you use canZE app and a on board diagnostics dongle OBDII info at the canZE website, highly recommended for a shed load of info about your car.

    User Guide



    Agree with above

Viewing 9 posts - 1 through 9 (of 9 total)

You must be logged in to reply to this topic.

Your one stop source for news and updates on the Renault ZOE. For the latest prices and deals with free charging visit FuelIncluded.com.