5.5 miles/kWh!

[google1901]

Having driven (MG5 FL) from west to South London (mainly south circular!) & back. That's 34miles (including 2 stops) and (yikes!) no queues. However, Sadiq controls the GL area (20mph limits) so the average speed was 13mph? As to miles per kWh the car indicated 5.5. Sounds good, but a little closer inspection my calculations suggest the average is nearer 5mi/kWh. Can we compete with MG's calculations?

 

[Alb]

How did you calculate your figure?

 

[google1901]

I take mileage once battery recharge(80%) complete & (in this case) start of trip. Take mileage (& % remaining to get the average). In general, using the % remaining indicator, it averages 2.9 -3mi per % (21°C & dry weather). So I believe this suggests 5mi/kWh?

 

[pollenface]

Best i got was 9.9kWh/100km ... dunno what that is in UK lingo.

 

[decrep]

Best i got was 9.9kwh/100kms ... dunno what that is in UK lingo.

So that's roughly 10kms/kWh, which is around 6kms/kWh.

Low speed driving I guess, or downhill and or tailwind?

 

[pollenface]

Low speed driving I guess, or downhill and or tailwind?

Accelerating really slow, driving at night in summer. No other cars on the road to tailgate me

 

[MickeySw]

I take mileage once battery recharge(80%) complete & (in this case) start of trip. Take mileage (& % remaining to get the average). In general, using the % remaining indicator, it averages 2.9 -3m per % (21c & dry weather). So I believe this suggests 5m/pkw?

If you take 57.4kWh as 100% then you’d end up with 5.1 to 5.2 miles/kWh, not sure if the car takes regen into account and calculates with ‘outgoing’ energy only?

Best i got was 9.9kwh/100kms ... dunno what that is in UK lingo.

6.2 miles/kWh, impressive

 

[crispyjay]

I managed 63.2 miles using 24% of battery on my Monday morning commute to work. With average 5.1mls/kWh. I was very light footed, traffic kind and no AC used.

Then charged on 7kW for free to 100% and got a ridiculous 337miles on the guessometer.

 

[MickeySw]

I managed 63.2 miles using 24% of battery on my Monday morning commute to work. With average 5.1mls/kWh. I was very light footed, traffic kind and no AC used. Then charged on 7kW for free to 100% and got a ridiculous 337miles on the guessometer.

It may look ridiculous but it’s based on your driving history, don’t now what distance it’s using to calculate the rolling average but a 337mile range is based on 5.9miles/kWh?

 

[kevin ellard]

Having driven (MG5 FL) from west to South London (mainly south circular!) & back. That's 34miles (including 2 stops) and (yikes!) no queues. However, Sadiq controls the GL area (20mph limits) so the average speed was 13mph? As to miles per kWh the car indicated 5.5. Sounds good, but a little closer inspection my calculations suggest the average is nearer 5mi/kWh. Can we compete with MG's calculations?

Just for clarification, the mayor doesn't control the speed limit in the London boroughs. It is done by each borough separately. Lewisham is 20 (which on the South Circular sometimes feels ridiculous and other times very ambitious) but Bexley is mostly 30.

 

[kevin ellard]

It may look ridiculous but it’s based on your driving history, don’t now what distance it’s using to calculate the rolling average but to a 337mile range is based on 5.9miles/kWh?

Does anyone know what distance or time period it uses for its projection?

 

[decrep]

I'm convinced my MG4 average is just distance over time, so it takes into account all the stops as well. It's not averaging all the speeds while moving. So for our purposes it's useless.

 

[MickeySw]

I'm convinced my MG4 average is just distance over time, so it takes into account all the stops as well. It's not averaging all the speeds while moving. So for our purposes it's useless.

You don’t need average speed to calculate range, average power consumption over distance travelled can achieve the same, e.g. my 2012 EV calculates RR based on the previous 15miles driven.

 

[fnegroni]

I take mileage once battery recharge(80%) complete & (in this case) start of trip. Take mileage (& % remaining to get the average). In general, using the % remaining indicator, it averages 2.9 -3mi per % (21°C & dry weather). So I believe this suggests 5mi/kWh?

You are assuming your percentage bar is accurate.

 

[M44LCY]

I'm quite new to the MG community and the forum but find myself becoming increasingly frustrated at the amount of navel gazing which goes on. I'm a retired university lecturer and absolutely appreciate the need for accuracy where that is needed. But I honestly can't see a need to work out the miles/kWh to any greater accuracy than is shown in the dashboard readout.

Surely the important thing is not so much an absolute number to X significant figures. To me, it's more useful to track the trend for your particular car and style of driving. For example, take the mi/kWh for trip A compared to trips B, C, D & E in the same car. What were the characteristics of each trip, in what circumstances does that suggest the car gives better or worse results and, ultimately, how can I use that understanding to maximise my efficiency?

I do, however, understand that my own view isn't universal. If someone likes working out the "correct" way to calculate mi/kWh (or whatever is being discussed in a particular thread) that's perfectly fine. Maybe, as a new member, I should keep my views to myself ?

 

[Aupa]

Best i got was 9.9kWh/100km ... dunno what that is in UK lingo.

I'm in the land of kWh/100km.

Divide into 62 to get miles per kWh.
e.g.

9.9 kWh per 100km >>
62/9.9 = 6.3 miles/kWh.
Nice number in both systems!

 

[Gomev]

I'm quite new to the MG community and the forum but find myself becoming increasingly frustrated at the amount of navel gazing which goes on. I'm a retired university lecturer and absolutely appreciate the need for accuracy where that is needed. But I honestly can't see a need to work out the miles/kWh to any greater accuracy than is shown in the dashboard readout.

Surely the important thing is not so much an absolute number to X significant figures. To me, it's more useful to track the trend for your particular car and style of driving. For example, take the mi/kWh for trip A compared to trips B, C, D & E in the same car. What were the characteristics of each trip, in what circumstances does that suggest the car gives better or worse results and, ultimately, how can I use that understanding to maximise my efficiency?

I do, however, understand that my own view isn't universal. If someone likes working out the "correct" way to calculate mi/kWh (or whatever is being discussed in a particular thread) that's perfectly fine. Maybe, as a new member, I should keep my views to myself ?

Some EV drivers can get a bit geeky and obsessed with the fine print. It usually wears off after a while.

 

[Aupa]

Some EV drivers can get a bit geeky and obsessed with the fine print. It usually wears off after a while.

I think the big issue for newbies (like me) is range. Once you have successfully planned and completed a few long trips, range becomes more of a game than a worry.
On a related topic, Electric-Ireland payg charging has dropped to €0.55¢ approx (£0.50p) per kWh.

 

[shpub]

It is called a guessometer for good reason - but still a good result!

 

[fnegroni]

I think the big issue for newbies (like me) is range. Once you have successfully planned and completed a few long trips, range becomes more of a game than a worry.

totally agree.
I see that with my ex. She was not sure she could deal with having to plan extra stops.
She had a 900 miles three-day journey for work, all over the south east wales and midlands. She said ‘how can I do that if I have to stop to recharge etc?’
I planned it all within a few minutes showing her where to stop etc. and that she would have had to stop to eat etc anyway!
The conversation ended there.