[YWGT3]

Beginning to question the validity of my correlation theory: higher charge is achieved by higher ambient temperature. Did a quick early morning run with the i8 and proceeded to recharge car thereafter. As noted in the snapshot, e-charge allowed for 20 mile charge. Ambient temperaturein garage at 10:32 AM was 68°F or 20°C.

[Epirali]

Sorry not sure what you mean. You should have more capacity and range the warmer it gets.

[YWGT3]

Originally Posted by Epirali

Sorry not sure what you mean. You should have more capacity and range the warmer it gets.

I am wondering whether the extended capacity and range has less to do with the ambient temperature of the garage, where the charge occurs. Specifically, when the garage temp. is between 65-70°F, the charging yields a battery capacity range of 17-18 miles. However, this morning's charge produced an electric range of 20 miles despite a garage temp of 68°F. So I'm guessing that the extended range has less to do with the ambient temp. and more to do with the temp. near or around the immediate periphery of the battery cells.

[MalibuBimmer]

The range shown by the car is based on how it was previously driven and is not necessarily accurate. I've been able to coast down the mountain next to my house and then show 29 miles range. Once I started driving it snapped back to reality.

[Aye-eight]

Originally Posted by yw

I am wondering whether the extended capacity and range has less to do with the ambient temperature of the garage, where the charge occurs. Specifically, when the garage temp. is between 65-70°F, the charging yields a battery capacity range of 17-18 miles. However, this morning's charge produced an electric range of 20 miles despite a garage temp of 68°F. So I'm guessing that the extended range has less to do with the ambient temp. and more to do with the temp. near or around the immediate periphery of the battery cells.

Previous drives (not sure if one, all, rolling average, ...) affect the range more than ambient temperature.

People seem to quickly forget how unreliable and easily manipulated the range readings are on ICE cars, and now expect the absolute truth from an e-range reading. On a normal car, get the tank down to the last 20 miles, and then try cruising through a city at night @ 35 mph vs. racing down an Interstate at 90. The difference in range is huge. So why wouldn't it be similar in e-drive?

[Aye-eight]

Anyway, this thread is supposed to be about data. So here we go: 37km / 23 mi fully electric. If you can drive at a relatively constant low-ish speed (city speed) without interruptions like stop lights or traffic, this is easy.

[Aye-eight]

Originally Posted by MalibuBimmer

In the US BMW says "up to 15 miles." The car meets that easily. The 35-37 kms? Puffery but probably not actionable.

Dunnit. See above. Drive was flat, along a lake. Curves and a few roundabouts, middle of the night, cool air, pretty much smooth sailing.

Keeping speed constant as much as possible, once accelerated to a very moderate cruising pace, is key.

[Twitch Massacre]

My car doesn't seem to be able to display more than a 14-15 mile range on a full charge after 1 month of ownership and 1000+ miles. I charge it every night as I like to use eDrive for all my short trips within my neighborhood. Doesn't matter how conservative I am with my driving I can't seem to get it to display more than the 14-15 mile range in EcoPRO. Any tips?

[Epirali]

Originally Posted by Twitch Massacre

My car doesn't seem to be able to display more than a 14-15 mile range on a full charge after 1 month of ownership and 1000+ miles. I charge it every night as I like to use eDrive for all my short trips within my neighborhood. Doesn't matter how conservative I am with my driving I can't seem to get it to display more than the 14-15 mile range in EcoPRO. Any tips?

Have you tried all the basics:

1) Set the car to charge/precondition THREE HOURS or more before you leave from an L2.

2) Ignore the estimated range, reset the trip information in center display.

3) Turn off AC, put car in eco pro mode, try driving on flat terrain with very gentle acceleration and prevent as much stopping as possible (even Regen is only 30-40% efficient).

If you do all of the above you should see somewhere from 17-20 miles before the low SOC will kick the engine on.

Curious have you had other electric cars?

[Twitch Massacre]

Originally Posted by Epirali

Have you tried all the basics:

1) Set the car to charge/precondition THREE HOURS or more before you leave from an L2.

2) Ignore the estimated range, reset the trip information in center display.

3) Turn off AC, put car in eco pro mode, try driving on flat terrain with very gentle acceleration and prevent as much stopping as possible (even Regen is only 30-40% efficient).

If you do all of the above you should see somewhere from 17-20 miles before the low SOC will kick the engine on.

Curious have you had other electric cars?

This is my first electric vehicle. In fact since I moved to the U.S. it's the first one that evades the Gas Guzzler Tax. When I'm on eDrive or Comfort I try to coast, and brake as little as possible.

[Aye-eight]

Originally Posted by Epirali

Have you tried all the basics:

1) Set the car to charge/precondition THREE HOURS or more before you leave from an L2.

2) Ignore the estimated range, reset the trip information in center display.

3) Turn off AC, put car in eco pro mode, try driving on flat terrain with very gentle acceleration and prevent as much stopping as possible (even Regen is only 30-40% efficient).

If you do all of the above you should see somewhere from 17-20 miles before the low SOC will kick the engine on.

Curious have you had other electric cars?

Fully agree. Range maximization takes carful and anticipative driving (e.g. coast towards and intersection rather than staying on the gas and then breaking).

Your car will only show more range once you've actually successfully driven that longer range.

[MKSixer]

Typical Range: 14-15 miles after overnight charge. Typical conditions. HOT...aircon needed nearly all the time!!

I had the vehicle on the 120v charger for the 4 days I was traveling this week and finally drove the car at the end of the fourth day. The range said 14 miles and increased to 16 miles as soon as I turned off the aircon since it was relatively cool (80F).

Here is the kicker. I drove 3 miles in eco-mode and the range didn't budge. It finally started declining at the normal use rate shortly, thereafter.

Question: Has a longer, uninterrupted charging time resulted in better range for anyone else?

P.S. I understand the basic physics and chemistry of Li-ion batteries.

[MalibuBimmer]

Longer charging times don't make any difference. Preconditioning does if you use the aircon. I live in the mountains and when I leave my house in either direction I'm faced with hills, and like the kid who walked to school in the snow, uphill both ways, since I live in a valley I have to go uphill, both ways when I leave my house. The hills are real mileage killers. But I once got 21.7 miles on electric only. I wrote about it on Easter Sunday.

[Epirali]

Originally Posted by MalibuBimmer

Longer charging times don't make any difference. Preconditioning does if you use the aircon. I live in the mountains and when I leave my house in either direction I'm faced with hills, and like the kid who walked to school in the snow, uphill both ways, since I live in a valley I have to go uphill, both ways when I leave my house. The hills are real mileage killers. But I once got 21.7 miles on electric only. I wrote about it on Easter Sunday.

Where you live with IDEAL weather precon doesn't help with battery , but in other locals and based on ambient temperature it should optimize battery temperature also (with the three hour in advance departure time).

[Epirali]

Originally Posted by Twitch Massacre

This is my first electric vehicle. In fact since I moved to the U.S. it's the first one that evades the Gas Guzzler Tax. When I'm on eDrive or Comfort I try to coast, and brake as little as possible.

It takes a little bit of time to learn the "tricks" of optimize the range. What you will learn in truth is how much driving style and speeds impact efficiency, except in a gasoline car you can mostly ignore it and feel back up.

Once you realize how to drive very efficiently using all the information and the "stress" of EVs then you find same techniques apply to ICE vehicles to.

[MKSixer]

Range this morning after overnight charge, 18 miles.

[rap427]

What was your outside/garage temp

[MKSixer]

Originally Posted by rap427

What was your outside/garage temp

Garage - 74.
Ambient - 79.

Both are lower than normal. We have been in the upper 90's to low 100's.

[rap427]

This weekend I was charging my car and had a power outage in mid charge. After I plugged it back in I only had 13 miles charge after completion for the first time. Usually had 14-15. Just wondering if the interruption caused the difference. Garage was about 80 degrees.

[MKSixer]

Originally Posted by rap427

This weekend I was charging my car and had a power outage in mid charge. After I plugged it back in I only had 14 miles charge after completion for the first time. Usually had 14-15. Just wondering if the interruption caused the difference. Garage was about 80 degrees.

Unsure.

I had a breaker trip about halfway through the process at one time and simply experienced an interruption. Once I reset the breaker, the charging continued as normal and gave me the usual range...14-15 miles at that point.

[MalibuBimmer]

Originally Posted by MKSixer

Range this morning after overnight charge, 18 miles.

Drive it to learn your actual range. I once got my car to say that my range was 29 miles on electric. In actuality I got about 16. (I coasted a lot of hills to get the displayed range that high.)

[MKSixer]

Originally Posted by MalibuBimmer

Drive it to learn your actual range. I once got my car to say that my range was 29 miles on electric. In actuality I got about 16. (I coasted a lot of hills to get the displayed range that high.)

Yes. I will perform a cycle this week and report the results.