Long range usable battery size and low states of charge

Atsham said:

Hi everyone,

I've had the LR now for 6 months and it's the first time I've run down to 1% SoC. I got home and plugged in (7kw ohme smart charger) and found it charged a total of 61.0 kwh. I was under the impression it only had a 57kwh useble capacity and the overall size of the pack was 61.5kwh? Does anyone have evidence of the actual buffers on the top or bottom end of the pack? I assume if the car was at 0% then I'd likely see the Ohme app show it would likely have taken 61.5kwh of energy.

Also I wanted to see what power restrictions/warnings the car would give (as I was local) so I would know what behaviour to expect if I was on a day out and things didn't go as planned (broken charger/long queues ect) and needed to get to another rapid charger.

I found at 10% the expected message stating please charge as SoC is low. It also lost some power, i.e. the right hand gauge would power upto a max of 70% not the full 100% marked Boost. To my surprise the speed was not restricted so I could still get to 60mph no issues (be it not swiftly). This was the case all the way until 1% at which point the car stated the hvac is running on low power. At 5% the estimated GOM range (9 miles) changed to -- -- (dashes)....but as I looped and did more miles, it seems like the 9 miles estimate was possible without restricting speed I assume the fact it was warm (14 degrees) and I didn't have steep hills may have played a part into this positive experience. I have alot less charger/range anxiety knowing this and yes I know its not good for the battery health going deep into the cycle but it's only once and I'd rather know this info now near home than find out later in the middle of nowhere with the wife and kids

Does anyone have any different experiences to the MG5 quirks or limits?

Thanks in advance

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biffo said:

I thought that it was 57kWh usable from a 61.1kWh battery - is it possible that the extra wattage was lost to inefficiencies in the AC to DC conversion (and other 'stuff') rather than the battery accepting more?

The only thing I know about the buffer is that the OBD reports 95% when the dashboard shows 100% - so 5% of 61.1kWh is around 3kWh, which would leave around 1kWh at the bottom? Or maybe it's 5% of 57kWh, so 2.85kWh, leaving 1.25kWh at the bottom. Or maybe it's neither.

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