The Ultimate MGS5 "Real World" Energy Consumption Thread

[Weeble]

I accidentally reset mine last week so can't submit a report for December. However I did a 90 mile trip today starting off at -2.6C and smattering of snow. Temp went up to +2 when I reached home and I managed 3.4 m/kwh which i wasn't displeased with.

 

[James Dean Driving School]

I've found if my Mrs drives a lot of short journeys the milage is poor, typically about 3 in the cold weather. I'll get 3.5 on short journeys in current cold weather 4.5 if not using the heater. Drove to Southampton and back from Poole Friday and got 3.9 with the heater on. Big caveat.. I just set it on auto 22* and leave it. I find once the cabin has warmed up the consumption is ok. Mrs sets it hot with the fan on high then does half a dozen 4 mile journeys and it eats the leccy...

 

[tsedge]

Ah... the old "if I turn it up to max it will get hotter quicker" strategy with climate control.

 

[Hugo A Go Go]

January has been a poor month for me. The low temperatures, lack of sunshine and me blasting the heating most days has probably not helped at all.

I am not attempting to get the best consumption possible, this is more of a real world usage figure for me.

 

[Alb]

Exactly what this thread is about
No effort to make the figure look good or bad. Just drive as you normally drive.

 

[Blackbartblues]

I’ll be honest. I’ve driven more carefully in this than any car I’ve owned for a very long time including other EVs. I’ve achieved 3.5 miles per kWh across the month. Or so the car says.

It’s lying. Today I reset the trip as I left a trade show and drove back home. The car said I did 3.5 (same as my month average).

3.5 miles per kWh would have equated to 162 miles given the percentage the battery dropped. I did 123 miles. The actual figure was 2.63.

 

[Black estate]

Picked yesterday and drive home

 

[Alb]

Looking forward to seeing your average over February

 

[Hugo A Go Go]

It must have been a slow drive home

 

[Alb]

Figures are in for January and I can only say that I am amazed at how good this car is.

 

[Blackbartblues]

Figures are in for January and I can only say that I am amazed at how good this car is.

View attachment 43129
View attachment 43130

Glad you’re getting good results (assuming your figures are derived from actual calculations, not what the car says, given my above experience).

Your mileage is certainly very low! I had a slow month - only 1 trade show - and still did 1,400 miles.

 

[James Dean Driving School]

mostly kids drop offs and short commutes.

 

[stevedee]

I've tried to assess 'real world' costs by using the amount of home charger power required to bring the %SoC back up to 80% after driving the car for approx 65miles. I then calculated the 'real' miles/kWh and divided by the car's indication of miles/kWh: approx 2.6/3.3 ~ 80%

At 7p/kWh & even allowing for standing charge, this is about 2.8p/mile.

With this kind of efficiency level, using a public charger may increase the 'ticket price' by 25%

Don't get too hung up on my figures because there will be rounding errors associated with 80% SoC cut off, Hypervolt charger estimate of charge, car's calc for m/kWh, & so on.

My maths and/or assumptions could also be iffy, & results are probably influenced by temperature. But its a start.

 

[TimothyN]

With this kind of efficiency level, using a public charger may increase the 'ticket price' by 25%

I don't understand what you mean by this. The cheapest public charger I have seen was 49p. That's 7 times what we are paying overnight at home, so I am confused by the 25%...

Incidentally, I have done my own calculations (which are made more difficult by the amount of V2L I do...the tumble drier is running as I write) and they are closer to 1.8p, but I drive very economically, mostly in 30, or 20, mph zones.

 

[stevedee]

Sorry, it's probably not clear.
All I was trying to say is if you pay for (say) 10kWh from a charger @80% efficiency, you may only be putting 8kWh of useable energy into your battery.

 

[James Dean Driving School]

DC charging is a lot more efficient than AC though. Almost negligible.

 

[TimothyN]

Is that to say that if you pay 1200% on the price you get 20% greater efficiency? I think I'll stick with 6.7p and 20% loss (call it 8p/kWh, so still less than 10% of the cost)