BMS and why you should set display to %

So I own a Model 3 P , a year of ownership,  25000 kms done.

Like everyone at the begining i was worrying on max range displayed, and how it was going down.

So I decided to gather data overtime to sort it out a little, and it seems that there could be a huge difference in max SOC displayed due to outside temperature, battery temperature.  current SOC... and so on. 

I think it might help new owners, and convince them to switch to % :-)

About the data : sometimes the max SOC is 500 km, so  311 miles , and can be seen on my car as low as 231 miles too... We can see clearly that around 25°C ( 77°F ) , range is displayed around 310 miles or so, so as advertised by Tesla.

But when temp goes down, Range displayed goes down, and this is not degradation.

Screen shot last week, car in my Garage at 25°C :  max SOC displayed  311 miles : 

But now check this out: today it reads only 231 miles !!

After yesterday night ( car slept in the street ) I started charging after lunch at 10 Amps , temp  32° F :  Max SOC : 231 miles  and you can see the blue line showing battery is freezed.

Same day, after 45 minutes charging at 10 Amps ( at work)  : Max SOC : 261 miles

    Battery is warming up

Next is also BMS calibration.

I have the habit when i reach 10% SOC to let it sit a few hours like that, and then only charge it up to 90%. It helps BMS to calibrate and have a better max range display.

Hope this helped you, current owners of M3.

Not an owenr yet, but ready to place an order for a Tesla and earn some free supercharging miles? 

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