MG4 Battery Maintenance? - What you SHOULD & SHOULDN'T do - Owners' Questions Answered
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- เผยแพร่เมื่อ 14 พ.ค. 2024
- Disclaimer: any recommendation given by me is largely based on online research, manufacturer recommendations, and experiences. I do not guarantee everything is 100% as I am not an EV technician or engineer.
☎️Contact me directly if you are interested in purchasing the MG4 in Auckland, New Zealand:
Jerry Pan - Ebbett MG Ormiston (East Auckland)
0272304811 (Sales Enquiry ONLY)
jerry@ebbett.co.nz (Sales Enquiry ONLY)
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A complete series of MG4 tutorials, user manual, beginner's guide, owner's manual, quick start, features walkthrough, and complete setup guide. I will show you all the features step by step on the MG4 Excite, MG4 Essence, MG4 SE, MG4 Trophy, MG4 X-Power, MG4 51kWh, 64kWh, 77kWh, MG4 Long Range, MG4 New Zealand, MG4 Australia, MG4 NZ, MG4 UK, MG4 China, MG4 purchase guide, MG4 review, MG4 walkthrough, MG4 Features.
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0:00 Intro
0:49 Battery Type
2:51 Should I charge the battery to 80%?
6:35 Risk of overcharging?
7:35 What to do with the battery charger when away for long?
10:17 What happens if the battery drops to 0%?
11:27 Battery Charging Equalisation?
12:19 How much does it cost to charge?
14:04 Lifespan of the MG4 EV battery?
17:03 Future battery upgrade?
18:44 Why do I do this type of Drive & Talk video? - ยานยนต์และพาหนะ
![[Full Episode] Hell's Kitchen Thailand EP.14 | 12 พ.ค. 67](http://i.ytimg.com/vi/MNspIlqlJcc/mqdefault.jpg)
I was so happy that the excite 51 came with an LFP battery! I probably wouldn’t have bought it otherwise and would still be waiting for an EV I was happy with for under 40K
Thanks for the comment.
Love your work Jerry! I watched all of your videos on the MG4 excite 51 before it was delivered. It helped ma a lot. Thanks for this update on charging the battery. Keep up the good work!
Thanks for the support!
Great video. Finally somebody expalines the battery maintenance in the mg 4.
Thanks for the support!
Thanks Jerry appreciate the effort you have put in with all of your videos. Made my MG4 Essence purchase an easy choice.
Thanks for the support!
Awesome thanks Jerry - so helpful!
Thank you for this video, really interesting. Hello from France !
Thanks Jerry for all your time and effort you have put into these "how to" videos on the MG4. They have been most helpful for me to understand the "bells & whistles" that the MG4 has. I've owned my Essence 64 since mid November 2022 and enjoying the EV/New car experience. I especially enjoy the regen when slowing or stopping.
Thanks for your support
Thanks for all your work on these videos, If I had found them before I bought my MG 4 I may well have been tempted to drive to Auckland to Purchase off you, not that I am at all dissatisfied with the guys I did get mine from, just that this is such an effort it deserves rewarding. :)
Thanks for the comment and support!
Hey Jerry I am from Indonesia and planning to get this car. All your tutorials are excellent and concise and appreciate that you make them. Wish i could buy this car from you 😂
Thanks for the support! Glad this video has reached Indonesia :D
In the MG4 user manual the manufacturer recommends same: if you leave the vehicle for a long period, make sure battery has at least 50% charge remaining.
Thank you for these tutorials as I am buying the MG4/ 64 version but I do wish they had LFP as for full use of the capacity and charging restrictions
Thanks for the support. Sadly the density and weight on the LFP battery stopped MG's design team on doing that.
Thanks Jerry. Great content as usual.
Thanks for the support!
Have watched all your MG4 videos since getting our Essence in December last year. Lots of helpful info. Your channel is a real asset to the MG4 community.@@JerryPanandCars
Thank you so much for this video!
Thanks for the support
Would u be doing a review on the 12volt battery? How to protect or charge it etc? Cheers
I live on a mountain with a MG4-51 and I've found it's best to charge it to about 95% so that the regen braking is effective on the way down the mountain, this extends the life of your brakes and I regen to about 97% by the bottom
Well done!
Thanks for the support!
Merci. vos tutos sont trés intéressants ,je les regarde tous. merci
Thank you! Merci.
Fab, thanks very much.
Thanks for your support!
Hi Jerry, thanks again for the great summary. Regarding #4, the manual mentioning a feature "intelligent charging". It states the 12V battery charge is maintained by the HV battery "under certain conditions". is there any other condition needs to be filled apart from the few which is listed in the manual (page 23)?
As far as I know, there is no need to do anything specifically for the 12v battery.
Re 9:12 and a long term test of the HV battery when the car is parked for an extended period, one of the MG4 Owners Australia FB members parked their MG4 [Excite64] at the airport for 6 weeks.
They reported 12% consumption on the HV battery over that time.
Thanks for the comment. Good to know the numbers. I also believe at lower temperature, the battery will lose a bit more over the time.
is this because of battery active cooling or heating? I'm from the Philippines. I'm worried that our hot climate here could degrade the battery faster.
@pollada1 cold weather affect the vehicle battery more than hot weather.
I have essence 64 and there is no issue at all in charging speed from 80- to 95% : Its spuer fast
Hi Jerry,
Is there a menu (hidden) or otherwise (OBDII?) method to check if there is any imbalance in the cells for example? I feel like I drive very little yet the MG4 (NMC) seems to be losing % a lot..
Ex: I'll drive ~2km and I'll see 1% drop. That's in normal just with AC without any sort of acceleration..I'm very aware of the %power use and generally outside of starting from a stop it sits between 0-10%
For the 51 excite how do you check the battery health (degradation status) and what is the best practice to prolong its health?
Battery health can only be checked at dealership
Hi Jerry, What ODB2 are you recommending for MG 4, Thank you.
Never used one :(
Hi Jerry I watch your channel in Thailand. We have the model X mg 4 ev here in Thailand. It has a 51 kWh battery. Please kindly confirm that I can use the public charging station at the dealership to charge the battery to 80 % every time. Because I live in an apartment complex and don't have a home charger installed. So I can't alternate charge monthly using the home charger. It has to be public fast charging to 80% all the time. Thanks 🙏
Not every time. fast charging isn't the best for the battery if you do it every time unfortunately.
@@JerryPanandCars Thanks for your response. I remember that in your video you mentioned that there are 2 types of batteries. The 51 kWh battery is ok for charging UpTo 80 and more. But the higher capacity long range battery charge preference is 80. So to summarize the 51 kWh battery and the higher capacity long range battery both need to be alternated with home charging once in a while. But the 51 kWh battery can be charged UpTo 80 and more all the time.
I've jst finished watching an MG4 Xpower video from the UK. They mentioned a 77Kwh battery version for the Xpower. How long before that bigger battery is available in NZ and Australia? Assuming we'd be on the same timetable.
Never heard of that before. I haven’t seen any news release about UK adding 77kwh for the XPower either.
@@JerryPanandCars I was looking at a lot of review's on the Xpower, before i found yours last night. It took some time to find the one i was looking for.. "What Car?" I had to use cc to make sure i had all the details.. He was going between Xpower and MG4 quickly and moved to an extended range to the long range. So, sadly, no 77Kwh Xpower. I am deep in decision making about getting an Xpower. Thank you for the battery composition information.
For long trips can’t you leave plugged in with a lower % of charge, say 50%, for both batteries?
You can but some say it is not great to leave it lower than 50%.
Jerry, I left my Excite at the airport for 6 weeks and had a main battery charge loss of about 12%. Still had 50+% left to drive 60km home with absolutely no issues. Was the charge drop due to maintaining the 12v battery?
The charge drop / battery lose is common for the batteries. Not related to 12v or charging 12v actually.
Does this also apply for the ZS EV?
Yes absolutely! Now you are making regret it. I should have done this video as ZS EV & MG4 both.
I bought the lfp one because I want to drive it as long as possible. Do you think it could last 20 years or something like that with 15k kilometers a year?
I would say it is likely to last more than that :D I have seen old BYD EV taxis in China with more than 400,000km.
Hi Jerry I have the ZS EV long range 72kwh what battery do I have it’s a 2023 year thanks
NMC pack. Thanks
So, what I understand is we need to charge 100% once a month, even the car is NMC 64kwh long range version?
That's what I found from some recommendations only (not MG official). Charge to 100% around once in a month will help.
Try this and see what happens: get the battery to 80%. Set the charging cut off to 90% and start charging again. Set a timer for 1 hour or however long it takes to go from 80 to 82%. Must be 82% or more.
When the battery is at 82%, while charging, change the cut off back to 80%.
If the battery needs to balance it will start a cell balance and remain at 82%. This could take an entire night on AC mains.
I found this feature by accident. It’s not documented anywhere. This is how I ended up listening to this channel.
I found this especially useful after a day of multiple DC rapid charging.
For me, the MG4 has way too many of these undocumented features. Edited March 2024
Hi, Jerry
When you turn on Air-condition MG4, you can hear very loud annoying noise anyone agree with me? (you have to hear it from outside of the car)
Can you discuss this matter with your MG engineer please? this is very frustrationg..I think every MG4 does make same sounds
It will be a recall matter I guess, Please advice me
The noise is normal on all MG4. It is not an issue actually.
@@JerryPanandCars th-cam.com/video/hey_BhfCAP0/w-d-xo.html is this really normal?
Why is the excite model limited to 80% charge when using AC, wont charge to 100%
Adjust the settings.
2:27 zero thermal runaway? You sure? If I short a series of 6 LFP batteries of size 14500 one of them will burn until the electricity is gone from all of them. The main difference is that the LFP battery gives off CO CO2 and H2 when or if it gets hot enough to burn. It doesn’t evolve oxygen or Cobalt soot. This could happen if the whole car was put in a furnace or a house fire. The electrolyte is still Lithium hexa fluoro phosphate. I would have preferred an LFP MG4 but didn’t like the option list
news.mgmotor.eu/press/the-exceptional-design-of-the-mg4-electric-in-detail/
a “Zero Thermal Runaway” safety concept, the safety protection of the passengers has been put front and centre.
I own one of these cars. Apart from the glossy marketing there is no mention of this “zero thermal runaway concept” ANYWHERE ELSE.
I think this is pure marketing with no implementation detail. None. Zero.
My comment was “if you get the battery hot enough eventually they will fail and burn. In the case of LFP batteries it’s an endothermic reaction. Still toxic but it will stop if cooled.
Currently the fire brigades and other first responders can’t tell and don’t care if a car battery is LFP or something else. The protocol will be the same
Hi Jerry,
Great video again. There is a lot of scaremongering from EV haters online. I saw an invoice which I am sure was fake for a replacement batter costing $39,000 for an MG4.
Just to set the record straight, what is thr approx cost to replace an 51kWh battery?
I'm not sure about the cost honestly. All I can say is, it isn't going to be cheap.
But, the price of replacement battery is honestly irrelevant for most EV cars and EV owners. We have had 4 years' experience with MG EVs from gen 1 MG ZS EV to MG4 and I have never heard any of them needed a battery replacement. It is like buying a petrol car and asking how much it will cost to rebuild this engine and chassis. The answer will be similar but honestly irrelevant. No one expects them to fail in any short time frame.
And even then I understand that only defective modules can have hand picked for replacement. Am I right
Thanks
Wrong, the standard MG4 51kwh LFP version loses 0.01% every day when using the car or not in a scheduled manner. Perhaps this information from the SOH is factif? In 11 months and 22,000km my SOH is 94%! Can you confirm to me if this information of programmed degradation of 0.01%/day is factual or real please?
The early stage of EV loses SOH much faster. After that, they lose very little over the year.
Not exactly on a timer. The MG software is rubbish where it can't calculate its own health. I have the LFP ZS ev. 51kWh If you dont do a deep discharge once in a while that SOH will drop. Also, the Gom will drop as well. The lowest I went on my 13 month old LFP ZS EV was 13%. Then SOH increased from 95.5 to 97.5% right away. While other factors do affect health, doing frequent low discharge and then charging to 100% on the slow AC charger does help.
@@theelectricmile474 I even did voluntary discharges with the heating down to 0% so that the SOH went back up without success. This car has several faults, and I'm almost sure the battery has a fault too.