[techwhiz1]

Originally Posted by LowOnCash

Hello - Regretfully the battery is far less than 84kw. The manufacture incorporates a buffer zone so the owner can never fully charge nor fully discharge the battery. While few manufactures disclose their design and readings, it's my guess there is roughly 70kw usable. In addition the BCM will will automatically deduct mileage depending on temperature and your past driving habits.

Another problem is there is no way for the BCM to show a more accurate range unless you fully charge. When charging as the voltage rises to the set level and the charger stops, it updates the SOC circuitry to update the batteries capacity, otherwise it has no idea of the batteries true capacity. You should fully charge at least once a week if you expect the range to be accurate.

Regards - Mike

BMW quotes the battery size is 83.9 kWh with a usable capacity of 80 kWh.

[heatmizr]

...AND current wisdom says to NOT charge to 100% weekly if you don't have to.

[freshxdough]

This is the problem with people only using EPA range as a figure. They think the car will fully charge and show that number every single time. In a perfect world, that would be fine most times. But not everyone drives the same. The more important question is how many miles are you actually getting from that full charge. Consume your full battery and see where that gets you. You can’t look at your phone battery at 100% and immediately know it will do XX hours and it be perfectly accurate. It depends on how you use it. And the car is smart enough to try and anticipate that based on previous drives, previous consumption, temperature, topography etc etc

[freshxdough]

Originally Posted by Kief

At the dealer picking up my new M50 and they have a DC charging but it’s taking hours!! Only 19kwh why if DC???

Sounds like they have a really out dated charger. We had ones at our dealer that were like 20kw also. Was fine when we only had the i3 in the early years of BMW EV

[EYE888]

As a side, FYI, these are same or common complaints from Tesla owners. The theoretical miles per full charge is dependent on many factors, # of passengers, using A/C, electronics, lead feet, running on sport mode or boost mode constantly, etc.

I think my i4 adapts the available miles based on my prior driving habit / experience per charging session and how many miles I got out of it. I've been charging to 90% and its usually right at about 200 miles available.