Keeping track of my MG4 (efficiency)

[wattmatters]

Two full years with the MG4. Here's the stats:

 

[nogbad]

March and May are quite different in kWh/km, is that when the weather gets cold in Hungry Head? (I went to find it on a map - it's a fair distance from Maidstone in Kent (UK))

 

[wattmatters]

March and May are quite different in kWh/km, is that when the weather gets cold in Hungry Head?

In March we moved home so I was doing a lot of towing.

This was the first load being dropped off to my shed. I did 20+ loads.

Winter here is June to mid-August but it's not really all that cold.

 

[nogbad]

In March we moved home so I was doing a lot of towing.

This was the first load being dropped off to my shed. I did 20+ loads.

View attachment 40377

Winter here is June to mid-August but it's not really all that cold.

Thanks, that explains it

 

[MG4JP]

First post updated, with September's data:

Period	Distance (km)	Efficiency (kWh/100km)	Average Speed (km/h)	Up Time
September 2025	1151	14.6 (4.26 mi/kWh)	31	36:43

Current overall combined efficiency: 14.9 kWh/100km (4.17 mi/kWh).



Did mostly urban driving this month, hence the lower-than-usual distance traveled.

Almost did a 900 km roundtrip during last weekend, but at the last minute decided against it - we were limited on time and bringing the MG4 would mean adding something like 2 hours to an already long trip, so we went with the family's PHEV instead.

 

[Everest]

This was the first load being dropped off to my shed.

Impressive shed

 

[MG4JP]

Impressive shed

I was impressed as well at how everything looks nice and tidy!

The shed, the driveway, the surroundings... Even the trailer looks impeccable.

 

[wattmatters]

October 2025 done and dusted. 10c per 100 km.

 

[MG Clive]

I must admit to not closely following your progress through this thread @wattmatters, but why is there so much variation in the $/100km, it ranges from as little as 4cents per 100km, right up to over $6 per 100km?

 

[wattmatters]

I must admit to not closely following your progress through this thread @wattmatters, but why is there so much variation in the $/100km, it ranges from as little as 4cents per 100km, right up to over $6 per 100km?

If we travel and need to use highway DC fast chargers, then the cost is much much higher. Meanwhile a month of only charging from home is as cheap as chips. Cheaper actually.

DC fast charging has made up 16% of the total charge energy but is 58% of the total cost.

 

[LenEV2016]

If we travel and need to use highway DC fast chargers, then the cost is much much higher. Meanwhile a month of only charging from home is as cheap as chips. Cheaper actually.

DC fast charging has made up 16% of the total charge energy but is 58% of the total cost.

View attachment 41040

View attachment 41041

Seems like a fair bit of work but if you like doing that sort of thing then not an issue.
Quick question and not a pop in any way, did you do similar when you had an ice car?

 

[MG Clive]

If we travel and need to use highway DC fast chargers, then the cost is much much higher. Meanwhile a month of only charging from home is as cheap as chips. Cheaper actually.

DC fast charging has made up 16% of the total charge energy but is 58% of the total cost.

Excellent, thanks for the explanation, it all makes sense now.

 

[wattmatters]

Seems like a fair bit of work but if you like doing that sort of thing then not an issue.

It's mostly automated. A couple of minutes each month perhaps.

Quick question and not a pop in any way, did you do similar when you had an ice car?

No, not with an ICE car because I didn't have Home Assistant integrations automatically collecting the data for any of my previous vehicles, and not for petrol/diesel purchases either.

With electricity I have data supplied by my home charging systems, while for the occasional DC charge sessions I get a statement in the app or emailed.

 

[wattmatters]

I noticed before I decided to buy my first EV (the MG4) that there wasn't a lot of long term consistently collated data on actual energy consumption and costs.

Lots of people were posting cherry picked data in order to win some silly online argument they were having with a troll, so I decided to keep a detailed record and make it as easy as I could.

Naturally everyone's use case and charging options vary. We can do most charging at home during the day when it stupidly cheap.

 

[MG Clive]

It's useful to keep track of the cost and efficiency, all I'm doing is keeping a track of the charging costs each time I charge, and I'm almost 12 months into ownership now, so I'll soon have my first year figures.

 

[NLMGSAN]

October 2025 done and dusted. 10c per 100 km.

View attachment 41037

Impressive cost effectiveness !
Do you also have the average speed?

 

[MG4JP]

First post updated, with October's data:

Period	Distance (km)	Efficiency (kWh/100km)	Average Speed (km/h)	Up Time
October 2025	1623	15.4 (4.03 mi/kWh)	32	49:19

Current overall combined efficiency: 14.9 kWh/100km (4.16 mi/kWh).

 

[wattmatters]

Do you also have the average speed?

Not sure if I can extract driving time from the data.

 

[EvTek23]

Yesterday I remembered, like the thread on the MG S5 forum as it was the beginning of the month, to record and then reset the data in the accumulated journey trip display. As I haven't done this for some time the accumulated time was 84 hrs, but it does show a good average of 4.2m/kWh. The MG S5 forum submit theirs monthly as a comparison as its a new model to get real world efficiency data. So here's mine for my MG4 Trophy LR. I'll try and record this at the beginning of each month to build up my own efficiency data.

 

[Anon70]

Will be 2 years with XPower at the end of November, stats to date...