MG5 2022 SoH

[jj10]

Good day,
I read already some topics about balancing and the MG5, but i dont see anything about current SoH's?

I am looking to buy a MG5 2022 with only 30.000 km (LFP version)..
But the problem is that the current SoH is (only) 86%?
The explanation of the car dealer (formal MG garage) is that its probably charges only with a DC charger and that causes some degradation.
They also have another MG5 with 70k and has also a SoH of 87%.
What is your opinion about this case?

• is this a fair SoH and i should not be worried and buy it
• is it reasonable to think its caused by DC charging only
• is it possible that the battery is never balanced before (caused by DC charging, not below 10%, not finished and unplugged before done)?

If the last thing is the case what to expect if you let the battery balance itself? Can it go back to 90-95% ?

What SoH do you have on your MG5?

A lot of questions, i hope someone can help me a little Thanks!

 

[Alb]

Have a look here:

Thread 'What's the Record for maintaining Battery SOH at 100%'

Jun 17, 2025

I've posted about my own measurements via Car Scanner before but I got the official reading today at my 4th annual service and it's still 100%.
Can anyone beat that?

• Alb
• battery maintaining measurement mg5 soh
• Replies: 25
• Forum: MG5 EV Forum

• 
• 

 

[jj10]

Have a look here:

Thread 'What's the Record for maintaining Battery SOH at 100%'

Jun 17, 2025

I've posted about my own measurements via Car Scanner before but I got the official reading today at my 4th annual service and it's still 100%.
Can anyone beat that?

• Alb
• battery maintaining measurement mg5 soh
• Replies: 25
• Forum: MG5 EV Forum

• 
• 

Based on that tread, it sounds like the SoH of 87% is really low for that amount of distance driven...
Do you think that balancing it will improve it?

 

[5teep]

86% on 30k miles is not good and they may be right about the DC charging causing at least part of it. If it's a true reading I don't think you can recover it, but if it's just the bms confused and never having had a balance charge, maybe you could bring it back up. Question is do you feel luck pun... oops sorry wrong forum .. would you be comfortable buying the car as it is with the range it has? if so then go for it and don't worry.
My first MG5 (SR) was measured at 98% on about 45k miles. I charged to full mostly on AC at home overnight with some DC most days to get home again. I did 100k miles in that car and I didn't notice any real range drop before it went back.

 

[jj10]

86% on 30k miles is not good and they may be right about the DC charging causing at least part of it. If it's a true reading I don't think you can recover it, but if it's just the bms confused and never having had a balance charge, maybe you could bring it back up. Question is do you feel luck pun... oops sorry wrong forum .. would you be comfortable buying the car as it is with the range it has? if so then go for it and don't worry.
My first MG5 (SR) was measured at 98% on about 45k miles. I charged to full mostly on AC at home overnight with some DC most days to get home again. I did 100k miles in that car and I didn't notice any real range drop before it went back.

Thanks for your response, and i think thats indeed the question
I think that the 86% isnt my real problem, its the fear that i will lose another 13% in 30k, and so on... I will only use an AC (11kw) charger and if it stays around 85% for the next 3 years than thats fine.
My real fear is that its a faulty battery and that it will be slightly above 70% when warranty expires and i will end up with a 50% SoH in 5 years time...

 

[MickeySw]

Thanks for your response, and i think thats indeed the question
I think that the 86% isnt my real problem, its the fear that i will lose another 13% in 30k, and so on... I will only use an AC (11kw) charger and if it stays around 85% for the next 3 years than thats fine.
My real fear is that its a faulty battery and that it will be slightly above 70% when warranty expires and i will end up with a 50% SoH in 5 years time...

If your battery is really LFP then frequent DC charging should not cause such a low SoH, however leaving it fully charged for an extended period of time (weeks) is known to cause excessive degradation.

I gather nobody has managed to increase a low SoH by re-calibrating the BMS on an MG5?

The low SoH is therefore most likely caused by a faulty HV battery and not degradation. Usually these things have a habit of getting worse, not better over time.

The 7 years MG warranty is only valid if the car has been serviced within strict intervals (time and mileage), therefore don’t assume the battery is still covered.

 

[jj10]

If your battery is really LFP then frequent DC charging should not cause such a low SoH, however leaving it fully charged for an extended period of time (weeks) is known to cause excessive degradation.

I gather nobody has managed to increase a low SoH by re-calibrating the BMS on an MG5?

The low SoH is therefore most likely caused by a faulty HV battery and not degradation. Usually these things have a habit of getting worse, not better over time.

The 7 years MG warranty is only valid if the car has been serviced within strict intervals (time and mileage), therefore don’t assume the battery is still covered.

Its being sold by a MG dealer and they confirmed that the warranty is still valid.
As the good salesman said, "because of that dont need to worry about the low SoH"...

 

[5teep]

Its being sold by a MG dealer and they confirmed that the warranty is still valid.
As the good salesman said, "because of that dont need to worry about the low SoH"...

MG say if the soh falls below 70% within 8 years they will replace? the battery. If you charge mainly on AC from now on the soh should not fall much further which is good news. You didn't mention I think which version of the car you are looking at, an SR at 86% should give you about 180 miles range in summer, dropping down to 120 on the coldest days of winter. The LR will be better by around 20 miles.

 

[jj10]

MG say if the soh falls below 70% within 8 years they will replace? the battery. If you charge mainly on AC from now on the soh should not fall much further which is good news. You didn't mention I think which version of the car you are looking at, an SR at 86% should give you about 180 miles range in summer, dropping down to 120 on the coldest days of winter. The LR will be better by around 20 miles.

Hi, what i can see the warranty is only for the first 7 years (in The Netherlands).
Its a SR indeed (i thought the SR is the only one with a LFP). That range would be sufficient.

 

[MickeySw]

Hi, what i can see the warranty is only for the first 7 years (in The Netherlands).
Its a SR indeed (i thought the SR is the only one with a LFP). That range would be sufficient.

I think @5teep is referring to the NMC (pre-FL) SR version (49kWh usable) when stating range. If that’s the case, expect less range from LFP models (46kWh) especially in winter.

MG MG5 Electric Standard Range

All details and specs of the MG MG5 Electric Standard Range (2022-2025). Compare price, lease, real-world range and consumption of every electric vehicle.

ev-database.org

 

[5teep]

I think @5teep is referring to the NMC (pre-FL) SR version (49kWh usable) when stating range. If that’s the case, expect less range from LFP models (46kWh) especially in winter.

MG MG5 Electric Standard Range

All details and specs of the MG MG5 Electric Standard Range (2022-2025). Compare price, lease, real-world range and consumption of every electric vehicle.

ev-database.org

Exactly so, one of the problems when talking about the MG5 is that there were a few variations pre and post facelift and the year of registration isn't always a good guide.

 

[MickeySw]

Exactly so, one of the problems when talking about the MG5 is that there were a few variations pre and post facelift and the year of registration isn't always a good guide.

Afaik Pre-FL MG5's were only sold in the UK & Ireland, the rest of Europe got the FL models later on. SR versions were always equipped with LFP batteries, LR stayed NMC.