Content by EVentropy in September, 2025

Yep. No point as there is no delta until 98%+ unless you got badly matched cells. Very flat charging plot. Btw, hojnikb , I have a comparison on top charge/ balance plot from PeterWA for LiFePO4, Exactly the same as mine!

And the damage being what? I cannot morally sell my car because manufacturer installed OS software that hasn’t fulfilled its terms of use, therefore I must disclose to new owner the impediment and discount price to compensate? Lot of ifs and buts. Define illegal car? OS software owner and...

Seriously thinking of trading my excite for an X. I didn’t buy an MG for the software. The feel good /$ ratio was driving factor. (Haa!) I will have to overlook NMC, which seems to be less relevant as they age.

PM'd you.

Good way to be but a small proportion of us of us are afflicted with "the need to know". Especially if what you are experiencing is different to what you have discovered to date and some salesman, service guy/gal suggest something that doesn't make sense. Maybe there's a vaccine for it? ( that...

Umm, really? I didn't post the the balancing one as its crap, unrealistic in extreme. Its at @FairWindsFS but didn't want to post as its so misleading. One above works, doesn't it? New at this, at least making them public.:unsure: Somewhat dodgy methinks.

Like your omoji. Never got around to windsurfing. Plenty of surfing around the world, but snowboarding put paid to that. (2x crushed vertibrae.) Now just go sailing. Just gotta get out there........

Wrong person to ask. My daughter sayes I suck at explaining things. :cry: then she is a University lecturer. Also my tech knowledge is confine to non-electronic electrical engineering of yesteryear. Essentially resistive "passive" balancing burns off extra energy with heat as name implies...

Absolutely! 😂 The blind leading the blind collectively thinking someone can see. I’ve been thrown dummy passes more than once by AI and internet. I still have no clue what my MG is trying to do at the top end of charging cycle as what is happening is just saving from overcharging high cell...

MG probably gave it to AI to answer.! Hey no reflection on you. I don’t believe anything until I’ve corroborated with data as too many players rushing devices to market and modifying SW as customers test it for them. If you study the way the chemistries behave in terms of rate of change , NMC is...

Not necessarily. As in the knee before charging terminates you will have a disproportionate Highest V cell and a high delta. Up to 300mV. Still within 3.65V max. In my case anyway, with both car & boat banks.

I can only get module voltages on my MG4 LiFePO4. (Car scanner pro/all sensors) Oh, so that was a demo? Enter PID for cell parameter perhaps.? Thanks

Yes, cheers. It would throw some light on the progression of "balancing". Yes. OBD plugged in, phone to USB port, with "car scanner pro" (on phone) set on MG4 config, and data recording activated. Connect via FICM and hit disconnect before you pull OBD or it wont save. (Good practice anyways)...

Why don't one of you guys plot HV & LV cell vs time whilst charging from say 75%? On at least a 7kW AC charger. This will prove what YOUR car is doing with current software. It will be a biggish file and take some time; Instead of all the supposition. I would be most grateful if I could...

Charging from 30% to 98% then plotting trace thru balancing I don't know why trace has skipped section to 3.65V cutoff but assume exponential curve continues to 3.65V cuttoff. I would be interested to see another Sr/SE/ Excite (Oceania) LiFePO4 plot for comparison as this balancing mechanism...

Repeated test at 30% ( too nervous to do 20% and heavy excelerate up steep hill) Same road,same exceleration pattern. Start delta 8mV at rest End delta 8mV at rest Delta at max load 120mV Lowest cell voltage at max load 2.71V * is 2.71V under load, of lowest cell within factory parameters...

And the bms update didn’t divulge what the upgrade “fixes” were? I wonder if the service dealership gets that information in terms of bulletin thru some dealer only part of portal. Like “secret screens” etc but via sips and Saic. I am surprised Saic has left the door ajar wrt to access to...

I’m going to do identical tests at 50% and 20% to confirm the trend of potentially non-linear increase in delta under hi load with decrease in SOC. To establish a DOD that I will not drive the car hard at and push the low cell in to degradation zone. < 2.7V With this tabulated I will consult...

For any that are interested, complements of AI “Horses mouth.” AI Overview can the parameters of the bms be updated in sips for mg4 in terms of charging termination, balance start and stop and delta of highest and lowest cell voltage by servicing dealerships Yes, the parameters of the...

Can the MG service technicians change the parameters of the bms(s)? Do they? My diy install ( in my boat) only uses the 3.65V cutoff as a battery protection device in the event the programming fails. It also is user configurable. Hence my dismay when I observed this occurring. Cell Voltage...

If you not into how 100+ cells are managed, don't read as somewhat OCD. I discovered this some months ago but the car performed fine and I was too busy at work to pursue. I recreated as I didn't save and I have booked my first service, this is as good a time as any to ask the experts. Last...

Could you rephrase please? You mean the law suit? Personally, I am more interested in an App like leafspy. "Tbh those in the know can find the obd info" Can you now get get voltages at a cellular level? And watch cellular balancing in real time? Now that I could get enthusiastic about! All...

Have to agree on the Beta software released before it’s balls had dropped. But hey, that par for course with a lot off stuff that is in a hyper competitive market where the item will be superseded within a couple years. It is at a price point and great to drive, if you ignore the foibles. If I...

I’m servicing this month. @2yr/40k as required* By warranty.May be the last. I gave them a warning call I’m coming with a list of questions for technicians. Tech stuff, some proprietary. Zero complaints just a couple “could be better’s,” one of which is “what is your success rate with updates?”...

Hi fellow Kiwi MG4 owners, We bought a MG4 excite (LiFePO4) in 2023 and it is just up for its first service. Anybody had and experience with 1st service provider that they were impressed with? Pretty happy with car and over looked BETA software and other (relatively) minor issues, cheap plastic...