JA04DEV
Posts: 6
Joined: Tue Oct 21, 2014 3:18 pm

Lost miles

Tue May 19, 2015 8:16 am

Car 1year old and already lost about 30+/- miles in ecopro+ anyone else have problem

WoodlandHills
Posts: 751
Joined: Mon Sep 15, 2014 4:50 pm
Location: SoCal

Re: Lost miles

Tue May 19, 2015 8:44 am

Do you mean that you have lost range compared to the same conditions one year ago? Have the temps this year been similar to those when you got your car? What sort of driving do you usually do: long commutes, around town, other? How much charge do you regularly put into the car in a session?

All of this would be helpful to compare apples to apples and allow the forum to help out.
Clipper Creek HCS-40P 32a EVSE
2014 REx Arravani Grey Giga all options
2008 Infiniti EX35
2008 smart ForTwo Cabriolet
2000 F-250 Powerstroke
2006 Westfield eleven
1984 Laverda RGS-1000

JA04DEV
Posts: 6
Joined: Tue Oct 21, 2014 3:18 pm

Re: Lost miles

Tue May 19, 2015 9:29 am

When I got the car at first after full charge overnight the read out would be around 100+/- now after overnight charge will not go by 71+/- I work oversea so rely only been on the road fr 6 months

alohart
Posts: 963
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Lost miles

Tue May 19, 2015 10:19 am

You should not depend on the range guesstimate which can change drastically based on many factors, including firmware updates which could (have?) changed the guesstimate algorithms. Instead, you should track distance driven per kWh consumed under identical driving conditions (not easy). Or maybe the total battery capacity as reported in the (secret) service menu is reliable enough to determine whether battery pack capacity has been lost (anyone know?).
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

WoodlandHills
Posts: 751
Joined: Mon Sep 15, 2014 4:50 pm
Location: SoCal

Re: Lost miles

Tue May 19, 2015 10:21 am

That's interesting, do you keep the car plugged in when you are away at work? There have been some posts here about long term storage and battery life. Not much hard data yet though AFAIK.
Clipper Creek HCS-40P 32a EVSE
2014 REx Arravani Grey Giga all options
2008 Infiniti EX35
2008 smart ForTwo Cabriolet
2000 F-250 Powerstroke
2006 Westfield eleven
1984 Laverda RGS-1000

JA04DEV
Posts: 6
Joined: Tue Oct 21, 2014 3:18 pm

Re: Lost miles

Tue May 19, 2015 10:35 am

I took the car out the other day after a full charge overnight and as usual 71+/- on the dash drove up to the city and back all in ecopro+ when I got back home I had driven around 54 miles on the trip computer and had 17 miles left on the dash all in my original 71miles I started off with.
The guy in the BMW showroom has said to me that 71 mle range was probably a more realistic average this after the original sales rep selling me on 95-100 average
Last edited by JA04DEV on Tue May 19, 2015 12:09 pm, edited 1 time in total.

WoodlandHills
Posts: 751
Joined: Mon Sep 15, 2014 4:50 pm
Location: SoCal

Re: Lost miles

Tue May 19, 2015 11:16 am

JA04DEV wrote:The guy in the BMW showroom has said to me that 71 mle range was probably a more realistic average this after the original sales rep selling me on 95-100 average


He is probably correct, I drive in Comfort exclusively and my range is around 64/65 after a full charge. In my case the Guess-o-Meter is pretty close to being accurate.
Clipper Creek HCS-40P 32a EVSE
2014 REx Arravani Grey Giga all options
2008 Infiniti EX35
2008 smart ForTwo Cabriolet
2000 F-250 Powerstroke
2006 Westfield eleven
1984 Laverda RGS-1000

Jeffj
Posts: 252
Joined: Mon Sep 15, 2014 12:32 pm
Location: Boulder, CO

Re: Lost miles

Tue May 19, 2015 11:42 am

What kind of efficiency are you driving at? You can easily find this out by using the trip computer. It shows your mi/kWh. If you reset it after you get a full charge, you will see an average mi/kWh for your travels on that charge (don't have it automatically reset). Assuming the nominal 18.8 kWh capacity, here is the range that you should expect for various readings:
3.0 mi/kWh -> 56.4 miles of range
3.2 mi/kWh -> 60.16 miles of range
3.4 mi/kWh -> 63.92
3.6 mi/kWh -> 67.68
3.8 mi/kWh -> 71.44
4.0 mi/kWh -> 75.2
4.2 mi/kWh -> 78.96
4.4 mi/kWh -> 82.72
4.6 mi/kWh -> 86.48
4.8 mi/kWh -> 90.24
5.0 mi/kWh -> 94

The nominal efficiency of the i3 REx is ~3.8 mi/kWh, showing a range of ~72 miles (per the EPA). The BEV clocks in at 4.3 for the EPA range of 81

You can have a huge impact on your efficiency based on the way you drive, hills, aggressive stopping with the brakes, etc. Obviously cabin comfort (heating and cooling) also take away from range.

JA04DEV
Posts: 6
Joined: Tue Oct 21, 2014 3:18 pm

Re: Lost miles

Tue May 19, 2015 12:16 pm

Cheers for that. You say after a full charge you are showing 64-65?? In comfort I am showing 52-54 I try and drive as efficiently as possible but still think their is something not right and would be happier if I seen the original 100 on the screen

noakey
Posts: 398
Joined: Mon Jan 27, 2014 8:11 am
Location: Swindon UK

Re: Lost miles

Wed May 20, 2015 3:59 am

JA04DEV wrote:Cheers for that. You say after a full charge you are showing 64-65?? In comfort I am showing 52-54 I try and drive as efficiently as possible but still think their is something not right and would be happier if I seen the original 100 on the screen


Hi.. after 1 year of ownership and 16000 miles my average is 4.1 miles per kwh with an average range of 80 miles..
Neil

BEV at 21,000 miles in first 16 months.
Average 86 miles per charge.
Best on full charge 112miles, worst on full charge 55miles
Loving every mile :)

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