panamamike
Posts: 63
Joined: Sat Jan 25, 2020 10:21 am

How often do you charge?

Wed Feb 12, 2020 8:37 am

Just recently bought a Rex 2015 with about 60 miles of range. Thought this would go farther, but seems real world range is closer to 50 miles when preconditioning and having the car sit overnight.

Would like to know others charging requirements experience.

Fisher99
Posts: 215
Joined: Sun May 12, 2019 6:24 pm

Re: How often do you charge?

Wed Feb 12, 2020 9:02 am

My 2014 i3/REX gives 50-60 miles when the temps are in the 20's and 30's (with battery pre-conditioning), and 70+ miles in warm weather. In the winter I charge every night. Sometimes even during the middle of the day if I have been running around a lot and know that I will need to run around more. In the warmer weather I may charge at night and may not, depending upon my driving for the day. Overall, with about 8 months experience with the i3, my motto has become "if in doubt, charge". But since I have the REX as a backup, I am sometimes a bit cavalier about that.

panamamike
Posts: 63
Joined: Sat Jan 25, 2020 10:21 am

Re: How often do you charge?

Wed Feb 12, 2020 11:11 am

Wondering if this would be any better with a 94 Ah car. How much more range would I get real world? Would I be able to skip a day.

derekgates
Posts: 31
Joined: Sun May 12, 2019 5:10 pm

Re: How often do you charge?

Wed Feb 12, 2020 11:54 am

panamamike wrote:
Wed Feb 12, 2020 11:11 am
Wondering if this would be any better with a 94 Ah car. How much more range would I get real world? Would I be able to skip a day.
My 2018 i3s REX, with the 94 Ah battery achieves 110miles every day for me. I charge nightly as the 110 miles is my route to work and back. If I absolutely baby the accelerator I can achieve 115-120miles.

panamamike
Posts: 63
Joined: Sat Jan 25, 2020 10:21 am

Re: How often do you charge?

Wed Feb 12, 2020 11:57 am

derekgates wrote:
Wed Feb 12, 2020 11:54 am
panamamike wrote:
Wed Feb 12, 2020 11:11 am
Wondering if this would be any better with a 94 Ah car. How much more range would I get real world? Would I be able to skip a day.
My 2018 i3s REX, with the 94 Ah battery achieves 110miles every day for me. I charge nightly as the 110 miles is my route to work and back. If I absolutely baby the accelerator I can achieve 115-120miles.
That's impressive. Do you loose any range at work sitting idle, or do you have preconditioning off?

derekgates
Posts: 31
Joined: Sun May 12, 2019 5:10 pm

Re: How often do you charge?

Wed Feb 12, 2020 12:32 pm

panamamike wrote:
Wed Feb 12, 2020 11:57 am
derekgates wrote:
Wed Feb 12, 2020 11:54 am
panamamike wrote:
Wed Feb 12, 2020 11:11 am
Wondering if this would be any better with a 94 Ah car. How much more range would I get real world? Would I be able to skip a day.
My 2018 i3s REX, with the 94 Ah battery achieves 110miles every day for me. I charge nightly as the 110 miles is my route to work and back. If I absolutely baby the accelerator I can achieve 115-120miles.
That's impressive. Do you loose any range at work sitting idle, or do you have preconditioning off?
I precondition in the morning before heading to work, while plugged in. I do not precondition at work as I cannot plug in the car (and do not want to lose range).

During these mild winter months in Florida I am starting to have 20-30 miles left over on the 'guess o meter'. In summer I was getting real close to completely empty and sometimes I had 5-10 mile range. AC is a killer.

These metrics are with Eco Pro mode enabled and the HVAC Eco Pro mode enabled (reducing the compressor energy). I also drive the speed limit when possible and keep speed under 67mph to reduce drag.

DaJemster
Posts: 3
Joined: Fri Jan 24, 2020 6:04 pm

Re: How often do you charge?

Wed Feb 12, 2020 3:56 pm

Charge Sun thru Fri. I skip Saturdays as there's sufficient charge for Saturday and Sunday errands.

I bought it for the wife and her commute to work and she has been consistently getting an estimated range of 142 to 144. She has always gotten better MPG than me in all our other cars. When I get hold of the i3, I only get the estimated 115, but realistically, I get probably 90.
2017 i3 - Capparis White w/BMW i Frozen Blue Accent
2016 F22 M235i - Black Sapphire Metallic
2008 E93 M3 - Alpine White III
2004 E46 M3 - Carbon Schwarz

thrifty3
Posts: 1
Joined: Fri Oct 18, 2019 12:24 pm

Re: How often do you charge?

Wed Feb 12, 2020 6:29 pm

If I am at home, the i3 is always plugged in, either charging or waiting for "time of use" period to start charging. Our electricity provider has the least expensive rate between midnight and 3pm, so the charging is limited to that time.

I use roughly 30% of the capacity of our 2017 Rex on my daily 50 mile round trip commute as I have learned the most efficient routes plus it's nearly always heavily congested. It's extremely consistent at using up about 30% of charge, and estimating roughly 150 miles of range on battery alone. I really can't complain. Not worried about charging it to the "top" all the time either as BMW has worked in a buffer both at the top and at the bottom, not allowing access to either far end of the battery capacity.
Current daily driver: 2017 BMW i3 Rex
Past car history: Nearly a dozen 85-89 Toyota MR2s including 88 Supercharged, 96 Lexus SC300, 05 Tacoma 4x4 manual, 11 Golf TDI, 01 Honda Insight manual

3pete
Posts: 38
Joined: Tue Mar 19, 2019 9:03 pm

Re: How often do you charge?

Wed Feb 12, 2020 8:18 pm

I follow the ABCs of charging; Always Be Charging. If my car is at home, I almost always plug it in to charge. I also have a 2014 (60ah) and my utility doesn't offer TOU rates, so I figure it's best to have a full battery as possible.

Obioban
Posts: 59
Joined: Wed May 22, 2019 6:16 am

Re: How often do you charge?

Thu Feb 13, 2020 6:24 am

panamamike wrote:
Wed Feb 12, 2020 11:11 am
Wondering if this would be any better with a 94 Ah car. How much more range would I get real world? Would I be able to skip a day.
new vs new, the 94aH car goes ~55% further than a 60aH car.

The earlier batteries seem to degrade faster (perhaps because for the same distance they go through more cycles), so as miles on the car grow that difference grows a bit with it.

We charge daily, drive 80-120 miles/day.
Last edited by Obioban on Thu Feb 13, 2020 7:23 am, edited 1 time in total.

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