groci3
Posts: 9
Joined: Mon Jan 26, 2015 9:04 pm

Maximum electric range

Tue Apr 07, 2015 4:01 pm

When I fully charge my i3, I see electric range prediction between 75 to 77 miles.

I thought it was supposed to be between 80 and 100 miles depending upon the mode you drive in?
I drive mostly in Eco Pro+ or Eco Pro mode and usually charge when the miles left is between 10 to 20 miles.

My car is 2 months old, hope there is nothing wrong with the battery.

jadnashuanh
Posts: 3186
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Maximum electric range

Tue Apr 07, 2015 4:24 pm

The predicted range is based on the last 18-miles or so of your driving. The outside temperature can play a significant part in your range estimates. As the temperatures warm up, you'll likely see your estimated range value go up...but, consider, your driving style can play a big part in that as can your climate control use and habits. Lots of short trips where the car can cool or warm up and require a fair amount of conditioning to be comfortable will be worse than one longer trip where it can just maintain. As can the speeds at which you drive...the max range really does start to drop off as you go faster.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

ryandesign
Posts: 63
Joined: Sat Jan 31, 2015 7:52 pm
Location: Austin, TX

Re: Maximum electric range

Tue Apr 07, 2015 8:00 pm

groci3 wrote:When I fully charge my i3, I see electric range prediction between 75 to 77 miles.

I thought it was supposed to be between 80 and 100 miles depending upon the mode you drive in?
I drive mostly in Eco Pro+ or Eco Pro mode and usually charge when the miles left is between 10 to 20 miles.

My car is 2 months old, hope there is nothing wrong with the battery.


Same here. Nothing wrong with your battery, just something wrong with BMW claiming things that are demonstrably untrue.
Born Electric 2015-02-21

fdl1409
Posts: 154
Joined: Sun Feb 23, 2014 1:37 am
Location: Germany

Re: Maximum electric range

Tue Apr 07, 2015 10:16 pm

My real range is always much more than prediction. Charged last night after 116km ( 72 miles ) with 18% SOC remaining. Range prediction was only 111km. That is in cold weather, we had -6.5C yesterday morning.

Frank
BMW i3 REx

stumbledotcom
Posts: 395
Joined: Sat Jan 18, 2014 3:35 pm
Location: San Francisco
Contact: Website

Re: Maximum electric range

Tue Apr 07, 2015 11:00 pm

ryandesign wrote:Same here. Nothing wrong with your battery, just something wrong with BMW claiming things that are demonstrably untrue.


The EPA estimated range is 81 miles for the BEV so there's nothing wrong with BMW citing that figure. Economy/range figures have to be established under controlled conditions to make comparisons valid. Your mileage always varies.

Want to maximize range? Make sure you consistently drive on level roads at a steady 35 mph nonstop for at least 20 miles on 82° F days. The guess o'meter will shoot through the roof.

Inconsistent range estimates aren't a phenomenon new to the i3 even. Driving my E90 around the city produces a range to empty estimate in the 170 miles territory. But after cruising on the freeway for about 20 minutes, it magically jumps to 330 or higher even. No conspiracy at work. Just a pitfall of attempting to estimate the future.

ryandesign
Posts: 63
Joined: Sat Jan 31, 2015 7:52 pm
Location: Austin, TX

Re: Maximum electric range

Tue Apr 07, 2015 11:06 pm

80 is a reasonable claim. 100 is not...

http://bmwi3.blogspot.com/2014/01/to-re ... stion.html
Born Electric 2015-02-21

MikeS
Posts: 676
Joined: Thu Jan 16, 2014 8:29 am
Location: Brighton UK

Re: Maximum electric range

Tue Apr 07, 2015 11:53 pm

I too think BMW made unreasonable claims, especially as range is such a key issue for EVs.

I typically get about 75 miles now whatever mode I use but that is normally with heating off, and I have had the car for long enough to work out how to max range. I always find that the car’s range estimate is fairly accurate although if I drive on 1 or 2 long journeys instead of my normal very short journeys range does improve slightly. I’m waiting to see if it does improve when it gets warmer - its around 10 to 12 deg in the middle of the day now.
BMW 3 Series 2005 - Aug 2014
BMW Z4 35i 2009 - Mar 2014
BMW X1 Mar 14
BMW i3 Sep 14

alohart
Posts: 781
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI, US and Uppsala, SE

Re: Maximum electric range

Wed Apr 08, 2015 12:39 am

ryandesign wrote:80 is a reasonable claim. 100 is not...

The average efficiency of our BEV over our first 1,600 miles is 5.6 mi/kWh. If we used all 18.8 kWh of our battery pack, our average range would be 105 miles. I always drive in Eco Pro+ with ACC set to 5 mph over the speed limit. I usually allow ACC to stop and start our i3 in traffic and to control its speed on highways. We live in an ideal BEV environment, so I know that our range is above average and that BMW's range estimates are attainable without resorting to extreme measures.
Aloha,
Art

Honolulu, HI, US: 2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE
Uppsala, SE: FOR SALE: 2000 Honda Insight hybrid

Lincsat
Posts: 87
Joined: Tue Nov 04, 2014 8:17 am
Location: UK

Re: Maximum electric range

Wed Apr 08, 2015 5:22 am

It's a long time ago but I'm pretty sure that when I first looked at buying an I3 the salesman said the "Official" range was 107 Miles and that translated to around 75 Miles in the "Real World"

archieb
Posts: 42
Joined: Tue Jan 20, 2015 10:00 am
Location: Wisconsin

Re: Maximum electric range

Wed Apr 08, 2015 7:12 am

With the weather finally warming up in Wisconsin I find my i3 BEV range starting in the low 90s to a high of 106. Yesterday I started with 98 for range, drove 84 miles with 8 miles still left when I returned home. Majority of the trip was at highway speed of 55. Trip computer showed 5.1 miles per kwh.

I try to drive with a helium foot. Easy on acceleration, stay at 55 or less and coast whenever possible when I have to slow down. The coasting part does require some getting use to, but it is the best way to take advantage of all the things that the i3 has to offer. As a Volt owner for 3 years I am very pleased with the i3 range.

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