Real world range of EVs

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Paul J.
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Real world range of EVs

Post by Paul J. » Fri Jun 14, 2019 10:21 pm

In case you haven’t previously seen this: https://www.whatcar.com/news/what-car-r ... rld/n18159
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Kei
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Re: Real world range of EVs

Post by Kei » Fri Jun 14, 2019 10:32 pm

Koreans have done well. Etron a complete brick. And not tested EQC probably much the same. iPace looks remarkably aerodynamic in comparison.
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Jelle v/d Meer
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Re: Real world range of EVs

Post by Jelle v/d Meer » Sat Jun 15, 2019 12:28 am

I did 2 real world efficiency highway test at 104km/h and 94km/h on the speedometer - both were done on quiet highways, ACC set, exact same route (triangle highway route so constant speed see the only 0.1kW regeneration), only 2 sharper turns (speed approx 70km/h for less than 1km), outside temperature 17-18 degrees, Eco mode, air off and just me in the car.

See below the results - 3% should be added to distance as my car registers less km than actual driven. So 10km/h lower speed gave approx 10% better efficiency.
The achieved results are minimal 10% better than my previous best efficiency for these average speeds.
  • 104km test - avg speed 101km/h (=63mph) - 216wh/km (=348wh/mile) so with 82kW usable 380km (=236 mile) range
  • 94km test - avg speed 91km/h (=57mph) - 195wh/km (=314wh/mile) so with 82kW usable 421km (=261 mile) range

Efficiency Test.jpg

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ricardon
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Re: Real world range of EVs

Post by ricardon » Sat Jun 15, 2019 8:12 am

Jelle v/d Meer wrote:
Sat Jun 15, 2019 12:28 am
I did 2 real world efficiency highway test at 104km/h and 94km/h on the speedometer - both were done on quiet highways, ACC set, exact same route (triangle highway route so constant speed see the only 0.1kW regeneration), only 2 sharper turns (speed approx 70km/h for less than 1km), outside temperature 17-18 degrees, Eco mode, air off and just me in the car.
Hi Jelle. Very interesting as it shows clearly the effect of speed on the range. I also wonder how realistic it is in real life. As you mention, your driving was very constant thanks to quiet traffic conditions, airco turned off, etc...

Now, from your activity on the forum I guess you have been keeping tabs on your consumption quite diligently, so I was wondering if you could present a figure after 1 year ownership and talk a little bit about your usual driving style.
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emgf
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Re: Real world range of EVs

Post by emgf » Sat Jun 15, 2019 8:15 am

The Tesla figures presented this week at the shareholders meeting by Elon Musk :

157BBCDB-8CD9-44D8-AF22-02A34E7A63AA.jpeg

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Jelle v/d Meer
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Re: Real world range of EVs

Post by Jelle v/d Meer » Sat Jun 15, 2019 9:10 am

ricardon wrote:
Sat Jun 15, 2019 8:12 am
Hi Jelle. Very interesting as it shows clearly the effect of speed on the range. I also wonder how realistic it is in real life. As you mention, your driving was very constant thanks to quiet traffic conditions, airco turned off, etc...

Now, from your activity on the forum I guess you have been keeping tabs on your consumption quite diligently, so I was wondering if you could present a figure after 1 year ownership and talk a little bit about your usual driving style.
I have for majority a Jaggg driving style (not caring about range as not needed) on longer trips I prefer speed over range (faster to drive quickly and charge more often/longer than drive slower to max range) - majority of trips are less than 10km. Made 2 long holiday trips (1900km and 3000km roundtrip) enjoying the Autobahn (160-180km/h on ACC) and Austrian country roads (traffic jams on highway).

So far did 17,200km in about 8 months with an overall average of 292wh/km where in winter months it was around 310wh/km, last month 275wh/km and so far this month 263wh/km.
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ricardon
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Re: Real world range of EVs

Post by ricardon » Sat Jun 15, 2019 2:44 pm

Jelle v/d Meer wrote:
Sat Jun 15, 2019 9:10 am
I have for majority a Jaggg driving style (not caring about range as not needed) on longer trips I prefer speed over range (faster to drive quickly and charge more often/longer than drive slower to max range) - majority of trips are less than 10km. Made 2 long holiday trips (1900km and 3000km roundtrip) enjoying the Autobahn (160-180km/h on ACC) and Austrian country roads (traffic jams on highway).

So far did 17,200km in about 8 months with an overall average of 292wh/km where in winter months it was around 310wh/km, last month 275wh/km and so far this month 263wh/km.
Hi Jelle. We share the same driving styles :-).
My daily commute to and from Brussels is about 70KM with 75% of highway speeds. As I leave early in the morning, those speeds are somewhat above the legal limit.
I've owned my car for about 2 months now and driven a total of about 3000KM. My average is 258wh/km and I can see a small evolution downwards (probably I'm not doing the warp-speed departures as much as in the beginning).

Overall it seems the I-Pace matches my expectations of consumption between 250 and 270 wh/km under average conditions.
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anorak
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Re: Real world range of EVs

Post by anorak » Sat Jun 15, 2019 3:55 pm

Jelle v/d Meer wrote:
Sat Jun 15, 2019 12:28 am
  • 104km test - avg speed 101km/h (=63mph) - 216wh/km (=348wh/mile) so with 82kW usable 380km (=236 mile) range
  • 94km test - avg speed 91km/h (=57mph) - 195wh/km (=314wh/mile) so with 82kW usable 421km (=261 mile) range
Efficiency Test.jpg
Your constant speed consumption is exactly 5% better than mine when it was 10 degrees C, Jelle. We have the same spec. and wheels so I'm guessing it was slightly warmer for your test?

Your overall average is about 20% worse than mine but I've never got anywhere near to doing 160-180km/h! Doubt I ever will in the UK. Half of my mileage is done by the wife pottering to work at 40-50mph (65-80km/h) so that probably explains the difference.

My overall average for 4000 miles since February has been 380Wh/mile (236Wh/km) for a total average range of 215 miles.
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DougTheMac
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Re: Real world range of EVs

Post by DougTheMac » Sat Jun 15, 2019 7:58 pm

Paul J. wrote:
Fri Jun 14, 2019 10:21 pm
In case you haven’t previously seen this: https://www.whatcar.com/news/what-car-r ... rld/n18159
Getting back to the original post, the What Car text methodology seems a bit strange. They discharged to zero, then measured the energy taken to fully recharge. Then they drove just 39 miles, and then measured the energy to recharge to 100%.
IMHO, a valid method of measuring efficiency (miles per KW-Hr IN), but a rather dubious method of measuring “real world range”. Rather sensitive to charging efficiency, battery management system losses, charge rate, etc. Why didn’t they just keep driving until the battery was flat?

I think we’d all agree that the result for the I-Pace was a bit flattering - 253 miles at 10-15degC, climate on at 21degC, headlights on, normal mode? Even on 18” tyres, that sounds optimistic. The average speed isn’t given, but it does say a mix of urban, rural & motorway.

I’m still hoping for more than 200 miles one day soon!
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ProjectZ
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Re: Real world range of EVs

Post by ProjectZ » Sat Jun 15, 2019 11:34 pm

I’m still debating wether to get iPace over a Model 3 performance, it’s a close race but my heart says iPace. I had an iPace for the weekend in picked the car up with 97% battery and drove 89mi + 27mi + 79mi being a of total 195mi with reasonably cold weather and mostly very wet roads. Coming back from Middlesbrough to Kendal it was predicting I’d be 10 miles short of home, so I stopped at scotch corner services for a 50kw charger. I was able to add 27.7kwh in 48min. I recon a 100% battery would have just got me home. Still it afforded me the scenic route after the charge and I made the the most of the awesome acceleration and handling. Still I recon 210-220 miles is a reasonable expectation, sound right?


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