MG5 2023 Trophy Winter Mileage

Jon542

Jon542

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I am wondering if the driving range when charging at home to 100% and the outside temperature is around -1 via 3 pin 13amp should be more than 145 miles. I have found the last 2 times I charged overnight the range was 140 and 145 miles. Many thanks.
 
Where does this "range" come from? The expected range given by the car on the "guessometer"?

I would imagine this is taking into account your recent efficiency, so have a look at resetting your total and see what you're doing. This figure suggests about 2.5mi/kWh for a 100% healthy battery which is quite poor, but could be realistic if most of your driving is very fast on a motorway.

From my own data recorded on Home Assistant, I can tell you when it was 1°C I did 157 miles using 86% battery, so my full expected range would be 183 miles, but it said just over 200 miles on the car's guessometer when I started. I don't imagine this would be much different if it were - 1°C.

If it's not your driving style, then you might want to check your battery health with a compatible ODB II dongle (search the forum) and an app (e.g. Car Scanner). You should still have 95%+ health unless your miles are crazy high.
 
Jon542 said:
I am wondering if the driving range when charging at home to 100% and the outside temperature is around -1 via 3 pin 13amp should be more than 145 miles. I have found the last 2 times I charged overnight the range was 140 and 145 miles. Many thanks.
Click to expand...
Reset your trip counters then put into ready mode with fan, heater etc off and in eco mode and see what you get it should show the factory GOM
 
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Jon542 said:
I am wondering if the driving range when charging at home to 100% and the outside temperature is around -1 via 3 pin 13amp should be more than 145 miles. I have found the last 2 times I charged overnight the range was 140 and 145 miles. Many thanks.
Click to expand...
It depends entirely on what the car was doing for the miles before you charged it up. The car assumes that it will carry on being treated the same way for all of the charge that it has available. If you lived at the top of a mountain range and you drove home at 70mph in freezing conditions then the car will show very low range when you charge it up.
It doesn't do any more complicated predictions than that and it has no idea about what will actually happen when you drive it. It will start to correct itself as it goes along if conditions change.
 
kevin ellard said:
It depends entirely on what the car was doing for the miles before you charged it up. The car assumes that it will carry on being treated the same way for all of the charge that it has available. If you lived at the top of a mountain range and you drove home at 70mph in freezing conditions then the car will show very low range when you charge it up.
It doesn't do any more complicated predictions than that and it has no idea about what will actually happen when you drive it. It will start to correct itself as it goes along if conditions change.
Click to expand...
Hence the importance of resetting the trip counters as per @Jomarkh ’s suggestion
 
Jaumg said:
Where does this "range" come from? The expected range given by the car on the "guessometer"?

I would imagine this is taking into account your recent efficiency, so have a look at resetting your total and see what you're doing. This figure suggests about 2.5mi/kWh for a 100% healthy battery which is quite poor, but could be realistic if most of your driving is very fast on a motorway.

From my own data recorded on Home Assistant, I can tell you when it was 1°C I did 157 miles using 86% battery, so my full expected range would be 183 miles, but it said just over 200 miles on the car's guessometer when I started. I don't imagine this would be much different if it were - 1°C.

If it's not your driving style, then you might want to check your battery health with a compatible ODB II dongle (search the forum) and an app (e.g. Car Scanner). You should still have 95%+ health unless your miles are crazy high.
Click to expand...
Last night I did 62miles using 32% battery so not dissimilar.
 
kevin ellard said:
I don't think I'd reset the trip counters just to get the car to tell me it has more range. That doesn't seem any more likely to be a true range than the car's guess that is based on recent events.
Click to expand...
Resetting the trip counters will make the car ‘forget’ the history, displayed range is mainly based on (amongst other factors) current battery capacity and ambient temperature. Range can go up or down.

It will update estimates as you go along, if this method is more accurate than taking the ‘usage profile’ of the past into account, is anyone’s guess…

[Edit:] on reflection, ambient (cell) temperature isn’t taken into account after a trip reset…
 
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If you assume roughly 2 miles per percent this is a good benchmark all year.

The gom is a little variable
 
MickeySw said:
Resetting the trip counters will make the car ‘forget’ the history, displayed range is mainly based on (amongst other factors) current battery capacity and ambient temperature. Range can go up or down.

It will update estimates as you go along, if this method is more accurate than taking the ‘usage profile’ of the past into account, is anyone’s guess…
Click to expand...
Is the MG system really sophisticated enough to take ambient temperature into account for displayed range after a reset?
 
It certainly reduces charge speed depending on temperature and I am pretty sure uses the battery heater on cold mornings

I don’t think this directly translates to the gin though
 
Pebblefeline said:
It certainly reduces charge speed depending on temperature and I am pretty sure uses the battery heater on cold mornings
Click to expand...
The MG5 does not pre-condition the battery for driving purposes. It automatically activates the heater for AC charging (to prevent cell damage in freezing temperatures) or to increase charge rates during rapid DC sessions
Pebblefeline said:
I don’t think this directly translates to the gin though
Click to expand...
Well, the chemical reaction inside a battery is affected by cell temperature, the car is taking this into account, otherwise summer/winter range would be the same?
 
If you reset the gom it will always show maximum range - degradation as I believe it measures from the total voltage

It does not take temp into account day to day its not that sophisticated

my range at 7 degree yesterday at 57 percent was 118 miles and it’s the same today at -2
 
In the MG4, in winter I do not reset the counters as the GOM looks at the previous driving and tries to get it to match that driving, but if you just do lots of motorway driving then the best results from the GOM is set the car heating on, the drive mode in normal and the GOM then reports what is approx you remaining range.

And in the winter on 100% my range is around 208 and summer around 255
 
kevin ellard said:
I don't think I'd reset the trip counters just to get the car to tell me it has more range. That doesn't seem any more likely to be a true range than the car's guess that is based on recent events.
Click to expand...
Of course it won't give you a 'true' range, but many newer EVers are witnessing the winter 'range' for the first time. The effect of cold temperatures, short runs with the heater on and are causing a few 'what the heck' reactions.
Resetting the accumulated trip (all that is necessary) is a simple method to allay the fears that something could be wrong because the GOM range is so low.
 
I am wondering if charging my 2023 MG5 Trophy to 100% via a 3 pin 13 amp in cold weather (around -1) should give me better than 145 miles?
Any comments would be greatly appreciated.
 
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