Re posting here and making this a sticky post so it doesnt get lost. @AlanSubie4Life originally posted:
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(originally posted by @AlanSubie4Life. Original thread this appeared in can be found here: ( 2021 model Y scan my Tesla battery size)
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There is. Assuming the car is delivered at a decent SoC (above 80%):
Switch to Car -> Display -> Energy Display Mode => Energy
Then go to ^ -> Energy->Consumption screen, select "5 mile, average" and calculate:
Battery Capacity @ 100% (in Wh) = Avg Wh/mi * Projected Range / SoC%
If the data is not complete due to not enough miles, not sure what will happen, so car has to have 5 miles, maybe.
That will always give you your true battery capacity at 100%, within about 1kWh. ........
Caveat 1: Can't emphasize enough that you have to do this assessment at a decent charge level (otherwise massive rounding error will cause errors in the estimate), so emphasize you want your car charged above 70% (preferably 80-90%) at delivery.
Caveat 2: Do not perform the calculation with a very cold battery (near or below freezing); the results may not be correct.
Caveat 3: This method provides a result which INCLUDES the energy buffer below 0% SoC. On Model 3 & Model Y at least, this buffer size is 4.5% of the full pack capacity calculated; e.g., if you calculate 71kWh, your buffer is 3.2kWh (4.5%), and your usable above 0% displayed is 67.8kWh (95.5%).
Caveat 4: Important for new vehicles: This method will not produce a capacity result in excess of a certain threshold; it will be capped at that value. The value depends on the specific model. For example, for 2023 Model 3 Performance, it will not provide a value above ~80.6kWh, even if the new vehicle capacity currently exceeds that. Capacity will drop below that threshold after some time.
This method, at the current time, should work on any Model 3 or Model Y vehicle. Probably any Tesla vehicle, but no idea.
As an example, on my 2018 Model 3, my capacity is 71kWh (down from initial value of ~77kWh). This is perfectly normal and expected.
118mi*477Wh/mi / 0.79 = 71250Wh = 71kWh (only 2 significant digits, so saying 71.3kWh is meaningless)
View attachment 620598
===========================================
(originally posted by @AlanSubie4Life. Original thread this appeared in can be found here: ( 2021 model Y scan my Tesla battery size)
.............
There is. Assuming the car is delivered at a decent SoC (above 80%):
Switch to Car -> Display -> Energy Display Mode => Energy
Then go to ^ -> Energy->Consumption screen, select "5 mile, average" and calculate:
Battery Capacity @ 100% (in Wh) = Avg Wh/mi * Projected Range / SoC%
If the data is not complete due to not enough miles, not sure what will happen, so car has to have 5 miles, maybe.
That will always give you your true battery capacity at 100%, within about 1kWh. ........
Caveat 1: Can't emphasize enough that you have to do this assessment at a decent charge level (otherwise massive rounding error will cause errors in the estimate), so emphasize you want your car charged above 70% (preferably 80-90%) at delivery.
Caveat 2: Do not perform the calculation with a very cold battery (near or below freezing); the results may not be correct.
Caveat 3: This method provides a result which INCLUDES the energy buffer below 0% SoC. On Model 3 & Model Y at least, this buffer size is 4.5% of the full pack capacity calculated; e.g., if you calculate 71kWh, your buffer is 3.2kWh (4.5%), and your usable above 0% displayed is 67.8kWh (95.5%).
Caveat 4: Important for new vehicles: This method will not produce a capacity result in excess of a certain threshold; it will be capped at that value. The value depends on the specific model. For example, for 2023 Model 3 Performance, it will not provide a value above ~80.6kWh, even if the new vehicle capacity currently exceeds that. Capacity will drop below that threshold after some time.
This method, at the current time, should work on any Model 3 or Model Y vehicle. Probably any Tesla vehicle, but no idea.
As an example, on my 2018 Model 3, my capacity is 71kWh (down from initial value of ~77kWh). This is perfectly normal and expected.
118mi*477Wh/mi / 0.79 = 71250Wh = 71kWh (only 2 significant digits, so saying 71.3kWh is meaningless)
View attachment 620598
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