Keeping track of my MG4 (efficiency)

[MG4JP]

Hello.
I'll be using this thread to share information with you about my MG4, and at the same time I'll use it for myself, for keeping track of its mileage, etc.

As a small introduction, I got my MG4, new from the dealership, at the beginning of June 2024.

It is a MY23 MG4 Standard (with the 51kWh LFP battery), in Diamond Red. It was on R33 software when I picked it up.

Spoiler: Click me for some photos

As for the stats, I'll be keeping track, monthly, of the following:

Period	Distance (km)	Efficiency (kWh/100km)	Average Speed (km/h)	Up Time
June, July and August 2024	3458	14.5 (4.29 mi/kWh)	34	99:59
September	1325	13.9 (4.49 mi/kWh)	31	42:34
October	1231	15.0 (4.14 mi/kWh)	28	43:49
November	1408	15.3 (4.06 mi/kWh)	36	38:16
December	1431	15.6 (3.98 mi/kWh)	34	42:06
January 2025	1656	16.9 (3.68 mi/kWh)	33	49:42
February 2025	1611	15.8 (3.93 mi/kWh)	33	47:44

Current overall combined efficiency: 15.2 kWh/100km (4.09 mi/kWh)


I'll also share more information (like issues, servicing, etc.) as it happens.
Feel free to ask me any questions.

 

[Rolfe]

I find the forum is good for making a record of what you're doing, so don't worry if people don't always answer, it's fulfilling a purpose anyway.

 

[NLMGSAN]

Period	Distance (km)	Efficiency (kWh/100km)	Average Speed (km/h)	Up Time
June, July and August	3458	14.5 (4.3 mi/kWh)	34	99:59
September	1325	13.9 (4.5 mi/kWh)	31	42:34
October	1231	15.0 (4.1 mi/kWh)	28	43:49

Overall combined efficiency (so far): 14.46 kWh/100km (4.30 mi/kWh)

Do these low average speeds mean you mainly drive around town an less so on highways?

 

[salty]

I didn't reply because I don't understand any of these stats/spreadsheet, posts.
Or indeed why? But each to their own.

 

[MG4JP]

Do these low average speeds mean you mainly drive around town an less so on highways.

Yes. Lots of time wasted sitting in traffic, dropping the kid at school, going to the factory then to the office (my work involves being in two different places almost everyday). Even the manoeuvres needed for parking the car in the apartment building garage takes some time.

Also, because of the way the car turns itself on (simply by placing your bum on the seat) this will result in it being on (with the speed average dropping...) for long periods of time, while static.

At least that's what happens with me, and as a result the average speed quickly comes down.

As for highway, I'd say maybe 1/6 of the total kilometres were done in highway.

I didn't reply because I don't understand any of these stats/spreadsheet, posts.
Or indeed why? But each to their own.

That's fine, of course.

Personally, I have always been a bit of a nerd when it comes to efficiency and have always enjoyed keeping track of the consumption figures of my cars. At least during one full year.

Not only that, but for EVs in particular, getting to know your car's efficiency (in all sorts of scenarios) will help when planning longer trips, so the more reason for doing so.

 

[Aupa]

Similar car, similar (happy) experience. MY23, Standard lfp 51kWh, 12500km. Mean kWh/100km = 16

 

[kenneth104]

24000km, 16kWh/100km, No average speed recorded
95% is used for commuting

 

[wattmatters]

I use the SAIC Home Assistant integration to keep tabs on mine. All the data automatically logged. Also auto log all home charging data, and I keep records of any charge sessions away from home.

I think I lost my manual data log for the initial months but here's the table so far:

 

[wattmatters]

 

[wattmatters]

The kWh values are all energy used to charge the car (i.e. what we pay for), not energy consumed while driving, which will be less by ~5-10%.

November was all done without any DC fast charging. Had one longer highway trip to visit my brother but was able to charge long enough with the granny charger to get home without need of any charging en route (roughly a 500 km round trip).

Costs were A$0.816/100km (£0.668 /100 miles for our UK friends).
Insanely cheap to run when charging from home.

 

[Everest]

How come solar charging % has reduced as you approach mid-summer down under?

I didn't reply because I don't understand any of these stats/spreadsheet, posts.

Isn't that an oxymoron

 

[salty]

Isn't that an oxymoron

God knows. Is it?

 

[wattmatters]

How come solar charging % has reduced as you approach mid-summer down under?

A couple of main drivers.

The first has to do with when we started with free grid energy tariffs, the other is to do with our household consumption patterns.

Firstly, the chart further up covers the energy consumed since we bought the car (up the date of posting) whereas my previous post was for November 2024 only.

If we look at the equivalent totals chart today:

Can see that it's not all that different to before.

At the time we bought the car we did not have a retail electricity plan with a free tariff period, that started six months later in March 2024 and it was only free 12-2PM on weekends. Then in July I swapped to a new plan with 2 hours (12-2PM) free every day, so charging became more concentrated during that period.

The second is about our household consumption patterns.

In Spring (Aug-Oct) and Autumn (Apr-May) months our need for heating or cooling using our reverse cycle aircon systems is minimal to zero, while solar PV output is still very good.

Summer (Nov-Mar) is when we consume a big chunk of energy for cooling/dehumidification and so those system consume a lot of our solar PV generation.

As a result we have twice as much excess solar PV generation available to consume in Apr, May, Aug, Sep & Oct than we do in Nov, Dec, Jan, Feb & Mar.

Then there is the assumption on how EV charging energy is assigned to solar and grid source buckets by ChargeHQ. It is assumed that all other loads on our property are satisfied first by our solar PV and only generation in excess of that is counted as being available for EV solar charging.

 

[Reg]

Similar car, similar (happy) experience. MY23, Standard lfp 51kWh, 12500km. Mean kWh/100km = 16

I purchased a MY24 with the 51 kWh battery in June this year and have done just over 1800 km before the last battery charge. Most of the use has been around town but includes one 150 km highway trip. The average efficiency is 15.8 kWh/100 km according to the car, 16.2 by my measurements, including 17.4 on the highway run. I'm very happy with the car apart from a recurring low tyre pressure alarm.

 

[MG4JP]

Updated the first post, with November's data:

Period	Distance (km)	Efficiency (kWh/100km)	Average Speed (km/h)	Up Time
November	1408	15.3 (4.06 mi/kWh)	36	38:16

Overall combined efficiency (so far): 14.62 kWh/100km (4.25 mi/kWh)

 

[wattmatters]

Latest update.

 

[fshuk1]

I use the SAIC Home Assistant integration to keep tabs on mine. All the data automatically logged. Also auto log all home charging data, and I keep records of any charge sessions away from home.

I think I lost my manual data log for the initial months but here's the table so far:

View attachment 31896

Holy crap. I don't have the need to do this, or the knowledge to do this, or the will to do this...but I am so jealous. Good on you

 

[salty]

Holy crap. I don't have the need to do this, or the knowledge to do this, or the will to do this...but I am so jealous. Good on you

Agreed. Apart from the Jealous bit.
Each to there own.

 

[MG4JP]

Updated the first post, with December's data:

Period	Distance (km)	Efficiency (kWh/100km)	Average Speed (km/h)	Up Time
December	1431	15.6 (3.98 mi/kWh)	34	42:06

Overall combined efficiency (so far): 14.78 kWh/100km (4.20 mi/kWh)


@salty
For someone who doesn't understand or care about any of this, you do come/post here a lot.

Also, wishes of a fantastic 2025 to everyone!

 

[salty]

Yep, because my mind boggles at all the data. And I do always say each to there own. And I mean that. If that's your thing, totally fair enough. But I can't help thinking to myself, why? Some of the spreadsheets, on here, which you are correct I don't understand, still look very impressive.