'Charge curve' graphs usually display charge rate , given in kilowatts, vs state-of-charge, given as a percentage of maximum charge, also known as SoC.
(You *could * plot this as charge rate vs elapsed time which really illustrates why you don't want to supercharge to 100% unless you have a lot of time to kill. Anyway most people graph it the other way.)
A typical charge session ramps up the kW to a max value where it plateaus for awhile and then, as the battery fills up, the rate "tapers" downward steadily from that peak.
Have a look at actual observed data from 2019 to get a feel for this.
One way of thinking about the 'taper' is monitoring the sum of SoC + kW.
For a large part of a typical supercharging session this sum is nearly constant. During this main phase of supercharging, it's pretty much a one-for-one tradeoff , a 1% increase in SoC leads to a 1kW decrease in charge rate.
Example: if your're charging at 150kW at 30 % charge, the sum for that moment is simply 180. A moment later you might see 149 kW and 31% charge. The sum is still 180.
I've seen Model 3's exceed 230. Not sure what the latest plaid X's can do.
Today my 2016 P90D was able to maintain SoC + kW > 140 from 30% to 65% SoC
My peak charge rate was 112kW.
Conditions were not unusual.
I got the exact same behavior a year ago in March.
(Tesla occasionally tweaks supercharging speeds with firmware updates.)
It's important to keep in mind supercharging rates are highly dependent on arrival SoC and temperature (internal pack temperature mostly, and to a lesser extent, ambient temperature as well) so a single charge session may not tell you everything.
But in general, over time you should be able to get a good feel for what your battery will take by just adding SoC+kW
(You *could * plot this as charge rate vs elapsed time which really illustrates why you don't want to supercharge to 100% unless you have a lot of time to kill. Anyway most people graph it the other way.)
A typical charge session ramps up the kW to a max value where it plateaus for awhile and then, as the battery fills up, the rate "tapers" downward steadily from that peak.
Have a look at actual observed data from 2019 to get a feel for this.
One way of thinking about the 'taper' is monitoring the sum of SoC + kW.
For a large part of a typical supercharging session this sum is nearly constant. During this main phase of supercharging, it's pretty much a one-for-one tradeoff , a 1% increase in SoC leads to a 1kW decrease in charge rate.
Example: if your're charging at 150kW at 30 % charge, the sum for that moment is simply 180. A moment later you might see 149 kW and 31% charge. The sum is still 180.
I've seen Model 3's exceed 230. Not sure what the latest plaid X's can do.
Today my 2016 P90D was able to maintain SoC + kW > 140 from 30% to 65% SoC
My peak charge rate was 112kW.
Conditions were not unusual.
I got the exact same behavior a year ago in March.
(Tesla occasionally tweaks supercharging speeds with firmware updates.)
It's important to keep in mind supercharging rates are highly dependent on arrival SoC and temperature (internal pack temperature mostly, and to a lesser extent, ambient temperature as well) so a single charge session may not tell you everything.
But in general, over time you should be able to get a good feel for what your battery will take by just adding SoC+kW
