Initial Efficiency Numbers?

[luis88]

So picked up the car yesterday and done nearly 100 miles already, loving it apart from the few 'quirks' we all know about that need fixing, but anyway.

I am a little concerned at the efficiency though as I did a lot of driving today under 60mph (a lot was actually on the 50mph average speed zone on M1 at the minute) and I wasn't even testing the acceleration at all, all very easy laid back driving.

Currently car is showing 28.1 kWh/100 mi based off average speed of 28.5 mi/h. This gives something like 150 miles off a full battery (extended range version) but is pretty alarming considering my driving style today with temps around 17 degrees and cabin temp at 22 degrees.

Did people find the same when they first took delivery and it takes time to settle in? I can't understand how kWh/100mi reading can be inaccurate from the outset as it is a defined number rather than an indicated range number?

[gloucester]

I too am curious how it is that people reckon the consumption rate improves with time. Yours is good compared to others over 30. Mine's about 29.5 at the moment.

[Stretford99]

I’m up to about 950 miles and and the consumptions has remained pretty consistent

If I have just the RWD on with One Pedal Drive activated I’m usually around the 24kw/100m mark. It seems to regenerate a lot of battery back esp if you are driving round town stopping and starting

If I have performance mode activated then it’s always around 32/33kw/100m and sometimes nearer 35. Again for driving round town so stop starting

I don’t notice the range improving over time - but the weather does seem to make a huge difference? I got real world range of 260 miles on a trip to London and back a few weeks ago when the weather was quite warm

I did the same trip this week and barely got 210 miles during the colder weather and had to charge on the way back just to be safe!

[JPM75]

Mines currently about 31kw/100 over 800miles covered, and on 100% charge gets about 220miles, 28.1 is fairly good!

Mix of motorway and town driving.

[SP1959]

I think you have made a mistake in your maths, which has caused you unnecessary worry.

I have the ER version as well. It has a 69 kWh battery, which Volvo says gives you a useful capacity of 65 kWh.

I have now driven about 2000 miles, and I have averaged 30.1 kw/100 miles - which gives me an average maximum range of about 200 miles.

You have been getting a much better efficiency than me. You are only using 28.1 kWh to drive 100 miles, which means you would only use 56.2 kWh to do 200 miles. That means if you started at 100%, you could drive 200 miles and still have about 14% left. For a full 100%-0% journey (which you would never do) this would give you a real world range of 231 miles.

[luis88]

Long day and indeed my maths were wrong for some reason I assumed that figure was over km and not miles so was doing extra conversions not required! Oh maybe my figures aren’t too bad then considering!

[Sean84]

700miles into my SMER. Average since ownership is 26.6kw/100mi. This is gradually coming down as I have now switched to one pedal drive which seems to be much more efficient.

[JamesP]

Those numbers are very good. I’m nearly 1500 miles in and averaging over 99 kWh/100miles.

[JoeS]

Those numbers are very good. I’m nearly 1500 miles in and averaging over 99 kWh/100miles.

Lol, don't worry, you aren't! My app said the same thing, must be a bug. Tells you the correct usage in the car.


I've been getting about 35kwh/100mi due to showing off the power to friends and family with launches etc, but driving it normally today I managed 28kwh/100mi (twin motor).

[SP1959]

I would love to know how the car calculates the efficiency. Yesterday my efficiency was shown at 45 kWk/100 miles - over a distance of 8 miles. Today I moved my car 20 feet and my efficiency is now shown as 50 kWh/100 miles - still over a distance of 8 miles. That seems a huge change for driving 20 feet!

Personally I don't look at the efficiency shown on the car or the app very often, but every time I charge the car I keep a record of the number of kWh put in, the mileage and the date. Then I can work out the efficiency on each charge and also the total since buying it. (I am a sad sort of guy!). However doing it this way gives me a less efficient number by about 10% due to energy lost - presumably due to electrical resistance, heat production etc - between the charger and the battery during the charging process.

According to the car I have averaged 30.1 kW/h/100 miles since new. But according to my figures of the total charge put in by my charger and miles driven it is 33.2 kWh/100 miles.

Earlier on this thread, there was a comment - "I too am curious how it is that people reckon the consumption rate improves with time". My thoughts too. How could the car get more efficient after a short period after delivery? But in my case I actually have the evidence:

On the day I collected the car, I started at 90%, drove 41 miles and then used 19.6 kWh to charge back to 90% - 47.8 kWh/100 miles.

Next day, I drove 101 miles and then used 43.8 kWh to charge back to 90% - 43.3 kWh/100 miles.

Then, I drove 133 miles and then used 46.2 kWh to charge back to 90% - 34.7 kWh/100 miles.

Since then I have been averaging between 30.3 and 35.7.

This was all (from car collection) on OPD and similar driving style. Not much town or city driving, mainly motorways and single-carriageway A-roads staying just below the speed limit.