Recent content by MickeySw

EV’s battery capacities are determined by the BMS; if the calculations are too low, actual range is affected. In general EV’s will stop when SoC is 0% (ish) even if the cells themselves are not ‘empty’.

Still gutted?

Moving the steering wheel to both extremes will usually clear all faults related to disconnecting 12V aux (aka hard reset) not the System fault though… If that’s the case then this would be a 5 min job with the dealer diagnostic tool, that begs the question why waiting until the end of March...

12.4V is about 80% SoC, anything above 12V should be fine to get the MG5 READY but if that doesn’t happen, the aux is clearly a suspect. If the voltage doesn’t drop during the starting process then the aux is not to blame. The car shutting down ‘mid-flight’ is a different issue, for this to...

The 12V aux does not serve any purpose (all low voltage power is provided by the CCU) when the car is READY, you could actually remove it?? The fact that the car started just fine using the 12V aux means it's OK. Disconnecting/reconnecting the aux does a full HW reset, which ‘fixed’ the...

Might have something to do with high frequency sound waves of the electric motor only the dog can hear? We have two cats, every time I turn on the air fryer the the kitten legs it out the door, the old fellow couldn’t be bothered but then his hearing isn’t the best??

LFP cells have a very low internal resistance therefore less heat is generated by the current flowing through them. The MG5’s heating circuit is also used to cool the cells while driving, hence cruising will not heat to battery to the 30-40 deg C required for optimal LFP charge rates.

As you have noticed CarScanner doesn’t display all PIDs correctly (CMU min/max voltages, Battery cells' data). I wonder if ‘Battery temperature average’ is to be trusted? It could well be that the OEM MG diagnostic tool shows different values? I see roughly the same slow 40-50kW in winter on...

Sorry, I misunderstood, are you’re saying that after the latest upgrade your NMC battery now thinks the average cell temperature is 10deg lower than actual? That’s obviously very concerning, anyone else experiencing the same issue?

I’m guessing you have LFP cells, if that’s correct, then what you see is as good as it gets, unfortunately.. The MG5 is designed to keep the battery at 10deg C or ambient temperature, whichever is higher while driving. It’s therefore a common misconception that cruising at motorway speeds is...

Afaik LFP SR FL models were never sold in the UK market therefore there doesn't seem to be much 1st hand experience available on this forum. But according to European colleagues LFP charge rates (especially in winter) are disappointing to say the least..

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.

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. https://ev-database.org/car/1646/MG-MG5-Electric-Standard-Range

You can check charging losses by comparing your wall box power (energy going into the car) vs iSmart/console values (energy going into the HV battery)?

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...