Wiki Sudden Loss Of Range With 2019.16.x Software

[Chaserr]

 

[Category5]

haha; brilliant!

 

[cynix]

I have a 2015 P85D. My 90% was 349 km prior to the 2019.16.x update, and now it’s 312 km

 

[petecrayton]

Obviously this is not a normal degradation case (not covered under warranty). It's a sudden and intentional capacity reduction.

Enlighten me please. Is the capacity (range) ACTUALLY reduced or is it possible that it simply shows it so? Perhaps the capacity gauge is not all that accurate so this is an attempt to insure that one charges up before going "bingo fuel" on batteries with some age on them?

 

[PaulusdB]

Enlighten me please. Is the capacity (range) ACTUALLY reduced or is it possible that it simply shows it so? Perhaps the capacity gauge is not all that accurate so this is an attempt to insure that one charges up before going "bingo fuel" on batteries with some age on them?

The capacity is ACTUALLY reduced, as has been stated before in this thread..

 

[petecrayton]

The capacity is ACTUALLY reduced, as has been stated before in this thread..

Thanks for the info. Just me being lazy. Ask you instead of reading through all the posts..kinda like the Cliff Notes in school.

 

[PaulusdB]

My car stalled at 1kW and 96% last monday, like yours. After updating to 2019.20.1 (from the ominous 2019.16.2) my car exactly replicated your most recent behaviour. Supercharging to 99% now yields 328 km.

Just updated to 2019.20.4.2; no change in range at 99%. Alas.

 

[DJRas]

Enlighten me please. Is the capacity (range) ACTUALLY reduced or is it possible that it simply shows it so? Perhaps the capacity gauge is not all that accurate so this is an attempt to insure that one charges up before going "bingo fuel" on batteries with some age on them?

 

[Droschke]

Enlighten me please. Is the capacity (range) ACTUALLY reduced or is it possible that it simply shows it so? Perhaps the capacity gauge is not all that accurate so this is an attempt to insure that one charges up before going "bingo fuel" on batteries with some age on them?

The usable capacity in kWh is reduced. If you look at some of data the owners have provided in this thread you will notice the kWh lost, which translates to range loss.

 

[sorka]

Chaserr can you explain the battery voltage issue? I was under the impression that batteries at the end of their usable life tend to have a slight decrease in voltage due to increased internal resistance. This is readily quantified. What implication does the 100% SOC voltage have?

Not at rest, but the higher the IR, the higher the voltage drop under x load.

 

[sorka]

UPDATE: spoke with Tesla service, they remote diagnosed and had this to say:

Expected range drop on a small percentage of vehicles during that exact update.

Additional info: As part of our recent revision of the charge and thermal management settings on Model S and Model X vehicles to protect the battery and improve battery longevity, a very small percentage of owners who own older vehicles may notice a slight small reduction in range when charging to a maximum state of charge. The drop in charge is not expected to continue and should stabilize quickly This change is the result of the updated charging profile as well as increased cooling, which helps improve the overall health of the battery. Charging behavior will vary based on how the vehicle is driven, charged, and the age of the vehicle.

This is the first change they have ever made that prevents fully charging the battery. The only other instance I know of where a manufacturer did this was to prevent the Note 7 from blowing up and this was done as a safety measure until the owners of those phones could return them for a full 100% refund.

If this is their written statement that you've quoted, then they should immediately replace the batteries for those that have had more than a "slight small reduction" in range without delay.

And they should LIE about the SOC. If they're going to limit it to 97% or 95% or whatever, then THAT'S what it should display when it's charged as much as it can!!!

 

[Chaserr]

I don't need a 100% refund but I've heard suggestions that they could offer battery upgrades. I'd pay for that.

 

[sorka]

As a manufacturer, we do not warrant the vehicles battery pack for capacity. I have carried out a remote health check on the vehicle and can find no faults.

Did you directly challenge them with the fact that you know this is not degradation but that they are no longer allowing your battery to charge to full?

 

[sorka]

Well well, look at what popped up today. My 2013 P85 has not lost any range and now I get this update. I am currently on 2019.20.2.1 Nope nope nope. It's a trapView attachment 424455 View attachment 424456

 

[Gixx1300R]

I don't need a 100% refund but I've heard suggestions that they could offer battery upgrades. I'd pay for that.

Battery upgrade will do nothing since the missing KWs are software restricted

 

[sorka]

Enlighten me please. Is the capacity (range) ACTUALLY reduced or is it possible that it simply shows it so? Perhaps the capacity gauge is not all that accurate so this is an attempt to insure that one charges up before going "bingo fuel" on batteries with some age on them?

It's actually reduced. You didn't read the thread.

 

[petecrayton]

It's actually reduced. You didn't read the thread.

You sound like my Dad

 

[Droschke]

In the followup email I received today, they now claim:

"It is possible that we may see the performance improved with future updates that will bring your range back up to where it was previously."

Since I'm lost what that means I've asked for clarification.

 

[sorka]

You sound like my Dad

That's funny. My daughter says exactly the same thing

 

[Droschke]

Battery upgrade will do nothing since the missing KWs are software restricted

That's an interesting point. If one gets a battery upgrade how does the software handle it?