Consumption

[salty]

I think considering efficiency and how to have the vehicle and battery ready for the best performance does make sense if preparing for a long journey at motorway speeds in winter where a bit of optimisation can make a big difference. However if charging stops are plentiful and one doesn't care about price this too can be ignored.

Personality is a key variable and many people would put less thought into modest decisions, for example...

I am currently fretting over whether to charge my NMC to 100% so I don't have to stop and charge at silly rates and can complete a round trip without trying to find a Charge Place Scotland charger at my destination that works and isn't ICEd. It's about 10 days early for my first 100% charge but I think I'll do it now rather than on schedule but when I have no journeys that actually would benefit from it.

I agree, if you're going on a long journey, it needs planning, of course it does. And different people's circumstances/needs,
are different, as per there EVs. I just think a lot of folk, get too hung up, indeed obsessed by what they are getting out of their EVs. Me personally as I've said, I charge it when needed, end of.
This is only my opinion of course.
???

 

[HazardLights]

I agree, if your going on a long journey, it needs planning, of course it does. And different people's circumstances/needs,
are different, as per there EVs. I just think a lot of folk, get too hung up, indeed obsessed by what they are getting Out of there EV. Me personally as I've said, I charge it when needed, end of.
This is only my opinion of course.
???

I admire your bold approach and hope in time to settle into it. My problem is that I am an obsessive optimiser constantly seeking to get the optimum of battery longevity (although the chances of me having this car in 15 years time are close to zero), economy, convenience, and not rewarding rip off charger companies! The problem with this approach is that it would be much more relaxing to just do what I will end up doing anyway which is "charge to 100% when it's convenient and don't sweat the small stuff" as I believe Americans would say. I don't think I am the only one in the obsessive camp on the forum but I think it will calm down with experience. Self inflicted range anxiety.

 

[NLMGSAN]

I admire your bold approach and hope in time to settle into it. My problem is that I am an obsessive optimiser constantly seeking to get the optimum of battery longevity (although the chances of me having this car in 15 years time are close to zero), economy, convenience, and not rewarding rip off charger companies! The problem with this approach is that it would be much more relaxing to just do what I will end up doing anyway which is "charge to 100% when it's convenient and don't sweat the small stuff" as I believe Americans would say. I don't think I am the only one in the obsessive camp on the forum but I think it will calm down with experience. Self inflicted range anxiety.

You do not need to be obsessive for being more aware of the costs. To be honest, if I would go on a holiday I would have to carefully plan the charges because MG is not helping me with it. But I would not worry about the costs too much since holidays cost money anyway.
But I drive 110 miles each day, unless I have a Teams day. And I also charge when needed, meaning every second day. This does mean many charges with a lot of miles each year. Driving my car economically and carefully planning where and when I charge saves me at least €1500 each year.

 

[fnegroni]

I also like to optimise some aspects of my life and unfortunately it’s a slippery slope.

I recently got myself a new bass and now I’m obsessively setting up the action and I realised I’m just wasting my time but some of us need to fall into that rabbit hole first ?

 

[Rapax]

Surely 'consumption' will be different for each driver as driving habits will always be different and will be reflected in the range for any car, ICE or EV. Same goes for how many kms you get on a specific type of tyre or brake pads etc. Even weather, wind, temp etc will be different in different regions/countries etc.

I know everything you wrote, that's why my question was "Does anyone know what is real highway consumption on 110km/h? What are your results?"
At speeds of 110kph (65-70mph) people mostly use ACC, and just weather conditions are different. Tires can make a difference from 17-18" but everything else is mostly the same. City driving is different story.

 

[fnegroni]

I know everything you wrote, that's why my question was "Does anyone know what is real highway consumption on 110km/h? What are your results?"
At speeds of 110km (65-70ml) people mostly use ACC, and just weather conditions are different. Tires can make a difference from 17-18" but everything else is mostly the same. City driving is different story.

Is your objective to establish whether your car is consuming more energy than it should?
I’m going out on a limb here but I think what you ought to be asking ‘what should be the energy consumption in these conditions’ (then list speed, weather, tyres, etc)
and I’m sorry to say you’ll just have to do a bit more work and create maybe a spreadsheet and list all the variables and allow for people to contribute

Otherwise all you are doing is repeating what’s already been asked and debated countless times on this very forum.

There are a few tests on YouTube done at mostly constant speed at 60 and 70mph on motorways.

if the reason to ask this question is to figure out whether you should charge to 100% before a long trip and how to calculate stops on the way, I think you are just going to go by some conservative numbers to start with or just follow ABRP and see for yourself.

Generally speaking though, if you plan to do as few stops as possible, start with 100% for sure.

 

[Rapax]

No, you didn't understand me well ?
I own this car just two months, but done big mileage for that time (5000km). But all of that was in mild weather and now it's getting colder. I understand that EVs suffer from temperature differences, but I find it extreme. For example tonight I went to see a friend, 20km in one way, flat ground, no hills, to there it was 11.9/100, on the way back it was 18, only thing that was different was temperature, from 17 to 11°C ??
About charging, that is not a problem, I have done more than enough long trips (400-550km one way), abrp is just a support for planing long trips, nothing more. I use google maps not abrp.
Almost all YT tests are with 64kWh battery, just a few are 77kWh, that's why I asked here if someone can share their experience. Or else, we should just watch YT (believing half of those videos are not paid) and forget about forums ?
Before I write anything on this forum I go and search if someone already posted what I need to know. And the topic of this thread is "consumption", so I thought I could find an answer here. ?

P.S. I'm sorry for my English, it's not my native language ?

 

[salty]

My heads just exploded! ???

 

[NLMGSAN]

Overall, meaning including charging losses, my ER runs a 16.6 kWh/100 km.

 

[wattmatters]

110 km/h highway driving is typically 17.5-18.5 kWh/100 km.

 

[Lord Randall]

No, you didn't understand me well ?
I own this car just two months, but done big mileage for that time (5000km). But all of that was in mild weather and now it's getting colder. I understand that EVs suffer from temperature differences, but I find it extreme. For example tonight I went to see a friend, 20km in one way, flat ground, no hills, to there it was 11.9/100, on the way back it was 18, only thing that was different was temperature, from 17 to 11°C ??
About charging, that is not a problem, I have done more than enough long trips (400-550km one way), abrp is just a support for planing long trips, nothing more. I use google maps not abrp.
Almost all YT tests are with 64kWh battery, just a few are 77kWh, that's why I asked here if someone can share their experience. Or else, we should just watch YT (believing half of those videos are not paid) and forget about forums ?
Before I write anything on this forum I go and search if someone already posted what I need to know. And the topic of this thread is "consumption", so I thought I could find an answer here. ?

P.S. I'm sorry for my English, it's not my native language ?

I have a similar experience. On my daily commute 26km+26km my average consumption (mostly urban and suburban) is 12kwh/100km going and 15kwh/100km going back.

I never managed to understand why.

 

[Rolfe]

I am currently fretting over whether to charge my NMC to 100% so I don't have to stop and charge at silly rates and can complete a round trip without trying to find a Charge Place Scotland charger at my destination that works and isn't ICEd. It's about 10 days early for my first 100% charge but I think I'll do it now rather than on schedule but when I have no journeys that actually would benefit from it.

That is an absolute no-brainer. Charging to 100% to be able to complete a round trip without having to use a public charger is absolutely why you bought the larger battery. Use it. And if you're so close to your "long charge" being due it's even more a no-brainer. The timing of that charge isn't that important, just do it every few months when it's convenient to have the car down below 10% charge.

 

[dsimpkins]

I have a similar experience. On my daily commute 26km+26km my average consumption (mostly urban and suburban) is 12kwh/100km going and 15kwh/100km going back.

I never managed to understand why.

Elevation possibly, maybe more downhill on way there, and more uphill on way back.

 

[Martinonline]

I have a similar experience. On my daily commute 26km+26km my average consumption (mostly urban and suburban) is 12kwh/100km going and 15kwh/100km going back.

I never managed to understand why.

Do you charge overnight before you travel out? I've found that with charging completed a few hours before travelling the HV battery is nice and warm. My return journeys do not have the charging and the consumption is higher as the battery warms.

 

[Lord Randall]

Elevation possibly, maybe more downhill on way there, and more uphill on way back.

I live in the Padana plaine on North Italy, ground is mostly flat

 

[Lord Randall]

Do you charge overnight before you travel out? I've found that with charging completed a few hours before travelling the HV battery is nice and warm. My return journeys do not have the charging and the consumption is higher as the battery warms.

Is quite constant over the week, usually temperature is 12-15 °C in the morning, and 19-22°C coming home.

Aircon is set at 25°C ventilation on 3

 

[wattmatters]

On my daily commute 26km+26km my average consumption (mostly urban and suburban) is 12kwh/100km going and 15kwh/100km going back.

It is amazing how even small changes in gradient and wind can affect consumption.

In elevation terms that would mean an average gradient of just 0.3% on that journey, negative on the way there, positive on the way back.

In wind terms it could be caused by a prevailing wind of ~ 10km/h, tailwind there, headwind return.

It could be a combination of both, e.g. a very light prevailing wind (~5 km/h) with a small gradient (~0.15%). That's enough of a difference in gradient and wind to result in the out and back consumption difference you quote.

Now throw in the impacts of temperature difference on air density, the car's drive battery efficiency and aircon consumption and the amount of gradient and/or wind required to cause this difference drops even further.

e.g. 10°C difference results in a change in air density which at ~ 70 km/h would be a difference in drive power demand of 0.2 kW.

 

[DixieTGS]

Is quite constant over the week, usually temperature is 12-15 °C in the morning, and 19-22°C coming home.

Aircon is set at 25°C ventilation on 3

Where we are the wind comes from th South West much more than any other direction. If travelling at slower speeds and a moderate breeze (15mph) from the same direction morning and evening, you could get a difference in consumption of 20%.

However I think you would have noticed the pattern changing now and then when the winds change to another direction.

I think about 80m height difference could also explain it, although I struggled to find a suitable route on ABRP to simulate it.

Edit: Cross posting. As @wattmatters said but my calculations were from playing with ABRP so not very scientific.

 

[Checo]

Elevation possibly, maybe more downhill on way there, and more uphill on way back.

I have no doubt that elevation is significant. I've been driving my MG4 on the short commute to work every day (20 km) since I bought it 3 months ago and in ideal conditions (this is Brisbane, so always ideal - mostly around mid-20s) I use consistently around 10 kWh/100 km on the way there and around 14 on the way home, depending on traffic. There's probably 150 m elevation difference (home is higher) and lots of ups and downs in between.

 

[wattmatters]

Each 0.1% of gradient adds a ~0.47 kWh/100km at perfect drivetrain efficiency but it's likely to be closer to 0.6-0.7 kWh/100km.