Some members will remember that I had issues with charging my EV3 which I collected in December. The car is currently in the garage and I have a courtesy car to give them a chance to resolve it. Having tried charging on other chargers away from home (both fast charge on DC and slower charges on 7 kw, 22kw using AC) I have been able to confirm to the garage that when fast charging there is no problem, but anything using the AC port causes issues. E.g. on a 22kw it was only charging at 3.4 kw, on a 42 kw AC only it was charging at 10.3 kw. I have saved all of the screenshots from the App and provided them. I am also now charging the replacement courtesy car on my home charger with no issues. Just wonder if anyone else has had this issue since I last posted? Thanks in advance
EV3 ongoing charging issues
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ForestBev
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297 Posts
For those that are not experiencing charging issues - how do you know that it stays at 7KW all the time?
I only noticed after adding external monitoring hardware and software to the mains supply for my Zappi.
The Octopus app only shows usage for the whole house, in 30 minute segments on a graph.
The Zappi app only shows instantaneous consumption, and a low resolution graph of historical data.
Looking at both of these sources, even when I know for a fact that the charge rate dropped, it's difficult to see any problem.
I'm using a Shelly EM clamp energy monitor, and even the graphs in the Shelly app make it hard to work out exactly what's going on.
I've got the Shelly data inside Home Assistant, and the graphs here show exactly what the charge rate is. I can "zoom in" on a short period of time, and it's obvious what's happening
I only noticed after adding external monitoring hardware and software to the mains supply for my Zappi.
The Octopus app only shows usage for the whole house, in 30 minute segments on a graph.
The Zappi app only shows instantaneous consumption, and a low resolution graph of historical data.
Looking at both of these sources, even when I know for a fact that the charge rate dropped, it's difficult to see any problem.
I'm using a Shelly EM clamp energy monitor, and even the graphs in the Shelly app make it hard to work out exactly what's going on.
I've got the Shelly data inside Home Assistant, and the graphs here show exactly what the charge rate is. I can "zoom in" on a short period of time, and it's obvious what's happening
Model:
EV3
Year:
2025
Like you, Home Assistant using entities from Hypervolt and Tesla Gateway 2, Hypervolt verified by Gateway.
Thank you. I have wasted hours of my time on this. Lesson learnt for me - I won't ever buy a newly launched model again - too risky I think.
I have Home Assistant monitoring my whole house electricity usage. I know the charge rate has never fallen as I have never seen a drop in energy usage during the 5 hour OG charging window. The background house usage is a fraction of what the car uses, so if the car stopped pulling 7 kW, it would be immediately obvious.
The amount of charge that has gone into the car also matches expectations of charging at 7 kW. A fall to 1.4 kW would result in a noticeable reduction in the range added
I’ve got home from a weekend away with a mere 3% battery remaining. I’ve set it on OIG to charge to 100% by 9am tomorrow. I have target charge levels set to DC 80% and AC 100%. OIG already added 4% and now is taking a break for an hour. I shall see what happens and if charged by 9am tomorrow
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107 Posts
I have no issues but I also know roughly how much should be added and roughly how long the charge should be.
The myenergie app shows how long and how much was added. If it dropped to 1.4 kWh overnight or some time during the night the crappy graph would show it drop from 7 to 1.4
Also it would take longer to add % of charge.
I slightly concerned as read quite a few people getting this after a few months but there’s nothing I can do.
The myenergie app shows how long and how much was added. If it dropped to 1.4 kWh overnight or some time during the night the crappy graph would show it drop from 7 to 1.4
Also it would take longer to add % of charge.
I slightly concerned as read quite a few people getting this after a few months but there’s nothing I can do.
The charging graph on the Myenergi (Zappi) app clearly show a step change in the charging rate from 7.2 to 1.4 kW and as the time period is hours it is easy to see the approximate periods. The dealer was happy to accept the "evidence"
IOG does not only charge in half hour periods, if there is a long period allocated it is set in the Zappi as one continuous "boost".
Octopus do not set a low charging rate, they only issue boost instructions to the Zappi and these are always at full power (7.2kW).
My last charge was a single overnight scheduled charge at full power (ie not using IOG) The charge rate was 7.2 for about 2 hours then it dropped to 1.4 even though the charger was still offering the car full power. So nothing to do with Octopus control, nothing to do with interrupted charging, nothing to do with charge rates set by the Zappi.
Dropping the charge rate in the car to 60% (4.4kW) or 90% (6.8kW) resulted in charging running at constant rate ie without dropping.
The dealer has now checked and reseated the ICCU and carried out a long charge at 11 kW to check for thermal issues. At the dealers request, I am now running the battery down low and will then attempt a long untimed dumb charge at 7.2 kW to see what happens.
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297 Posts
I nearly always seem to get short charging slots, which makes it hard to spot the drops on the "low resolution" Zappi graphs. I agree that it would be easy to spot during a 4 to 6 hour continuous slot.
Model:
EV3
Year:
2025
@clockworks I sent you a DM.
Model:
EV3
Year:
2025
Hi ForestBev
Just posted that my brand new EV3 won't charge - it's back at the dealer today, less than 3 weeks old. Did you ever get a diagnosis as to the issue and do you have a fix solution for your car ?
Regards
I assume you use Intelligent Octopus Go? If you want to test, you could disable IOG smart charging in the Octopus app for a night and just set up a single 5 hour charge during the low rate period from 23:30 to 5:30. If it runs at about 7kW for 5 hours you can be reasonably confident that all is well with your ICCU.
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297 Posts
Would I set the charge schedule in the Kia app?
Either that or the charge point app, or to rule out any outside factor, just plug in at 23:30 and allow to charge overnight without any timers.
My car always charges, it just drops from 7.2 to 1.4kW after a couple of hours. If your car is not charging at all, it should be relatively easy for the dealer to diagnose and correct. Maybe you need a replacement ICCU ?
Model:
EV3
Year:
2025
Hi Soula
I will wait to see what they say but a new ICCU after three weeks is not acceptable in my view. It's a fundamental part of the vehicle charging architecture it should not fail. The worry is that looking at this forum and others and also across the hyundai forums it appears to be a know issue. However, lets see I will post when I get an answer.
Can you educate us please—From what % and range left did you have the car trying to persuade you to get to a charger. Also did you get any loss of power or speed and if so when and what was power loss ?
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480 Posts
Five hour charge last night stopped after an hour, now my Hypervolt charger is offline. Unsure if the iccu caused it or the charger is at fault. Will ring Hypervolt tomorrow to see if they can get my charger running again. In the meantime I guess I will have to venture onto a weekly public charger...not used one yet.
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Model:
EV3
Year:
2025
Have you rebooted it? Turn off the breaker feeding it, wait 10 seconds and turn back on.
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