Charge rate goes down steadily

[tronathan]

Model Y long range; ~10k miles; ~6months old.

When I plug into a supercharger at a low charge (20% or less) it starts at 250kw+, then the charge rate steadily drops. By 40% it's down to 150kw; by 50% it's down to 120; by 65% it's down to ~70kw. What gives? It happens in mild (45-50 degree temps) Have I supercharged too often? Takes abt 40 min to go from 10% to 80%.

 

[tronathan]

Model Y long range; ~10k miles; ~6months old.

When I plug into a supercharger at a low charge (20% or less) it starts at 250kw+, then the charge rate steadily drops. By 40% it's down to 150kw; by 50% it's down to 120; by 65% it's down to ~70kw. What gives? It happens in mild (45-50 degree temps) Have I supercharged too often? Takes abt 40 min to go from 10% to 80%.

I should add that a couple months ago this didn't happen. It happens all the time now

 

[FatFalcon]

This is what a charging curve looks like. It starts high and gradually decreases. What you are describing sounds like 100% normal charging behavior for most EVs.

 

[Big Earl]

This is completely normal charging behavior. The fastest charging occurs at lower states of charge.

 

[tronathan]

Interesting and thanks for the insights - am I mistaken that when I first got the car supercharging was relatively constant and high all the way to 80% ?

 

[ucmndd]

am I mistaken that when I first got the car supercharging was relatively constant and high all the way to 80% ?

You are indeed mistaken.

 

[jjrandorin]

am I mistaken that when I first got the car supercharging was relatively constant and high all the way to 80% ?

Yes..... well, either you are mistaken, or you have the only Tesla sold to an end customer in existence that did that.