For the several ways:
Drove 100-0%, let the car stand for a while and check the exact SOC After ”sleeping” a little.
From this (delivered energy) we can calculate the total capacity quite well.
One year ago I did this with my M3P.
75kWh delivered, 0.41% SOC left after a short sleep ( about 0.3kWh) and the buffer 3.5kWh was there. Totally 78.8kWh capacity.
We can also let the car sleep with high SOC, record the exact SOC*, drive a longer drive, record the delivered energy and let it sleep for a while and then record the SOC* exactly.
Used energy/ delta SOC* = capacity.
*) SOC = true SOC, not the displayed.
Drove 100-0%, let the car stand for a while and check the exact SOC After ”sleeping” a little.
From this (delivered energy) we can calculate the total capacity quite well.
One year ago I did this with my M3P.
75kWh delivered, 0.41% SOC left after a short sleep ( about 0.3kWh) and the buffer 3.5kWh was there. Totally 78.8kWh capacity.
We can also let the car sleep with high SOC, record the exact SOC*, drive a longer drive, record the delivered energy and let it sleep for a while and then record the SOC* exactly.
Used energy/ delta SOC* = capacity.
*) SOC = true SOC, not the displayed.