problem with battery percentage estimation display on 2021

[Waynebo20]

I just took about a 200 mile trip and used 71.2 kW of my 88 kW battery. I left at around 92 % and returned home with a 20% charge. I was doing the calculations and I think the display has a 10% discrepancy. The problem is that I wonder if the lower range and battery % is reliable. Was my car actually at 20% or could it have been much lower. This is very concerning because I would hate to get stranded running out of power from erroneous displays.
I have charged to 100% about once a month to calibrate the display as suggested for the type of battery in the car.

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[Billyk24]

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[RickMachE]

I just took about a 200 mile trip and used 71.2 kW of my 88 kW battery. I left at around 92 % and returned home with a 20% charge. I was doing the calculations and I think the display has a 10% discrepancy. The problem is that I wonder if the lower range and battery % is reliable. Was my car actually at 20% or could it have been much lower. This is very concerning because I would hate to get stranded running out of power from erroneous displays.
I have charged to 100% about once a month to calibrate the display as suggested for the type of battery in the car.

Your issue is 100% a math one.

92 - 20% = 72%. .72 x 88 = 63.36kWh. You think you used 71.2. Why?

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