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I have not noticed any difference. Same behavior as always.
OK here is the result of my testing before updating my car to 2019.40.x and after. Tesla significantly reduced the available regen power when the battery is cold. The blue line is the new behavior. You can see how much warmer the battery has to be to get the same regen as before,
The data is collected from the CAN bus data which is the car's internal data bus. I made a simple graph showing the difference. I'm honestly surprised why after so many years they decided to change it.
View attachment 492192
OK here is the result of my testing before updating my car to 2019.40.x and after. Tesla significantly reduced the available regen power when the battery is cold. The blue line is the new behavior. You can see how much warmer the battery has to be to get the same regen as before,
The data is collected from the CAN bus data which is the car's internal data bus. I made a simple graph showing the difference. I'm honestly surprised why after so many years they decided to change it.
View attachment 492192
Thanks for posting the data!
What is the X-axis of that graph? Is that kW or percentage of full regen?
Sorry, I forgot the label. Yes X-axis is regen power limit in kW set by the BMS.
Thanks for the info David.
are you driving and using regen to warm the pack up to get these data points?
Not arguing with your data, as I have none, but seat of pants observations tells me it feels like a lot more than a 3 degree C difference: I would have guessed 10 degrees.
Thanks!
I thought max regen was limited to 50 kW and didn't realize max regen goes up to 100 kW!
That explains why I feel such a big difference when driving with the barely available regen after a recent software update.
OK here is the result of my testing before updating my car to 2019.40.x and after. Tesla significantly reduced the available regen power when the battery is cold. The blue line is the new behavior. You can see how much warmer the battery has to be to get the same regen as before,
The data is collected from the CAN bus data which is the car's internal data bus. I made a simple graph showing the difference. I'm honestly surprised why after so many years they decided to change it.
View attachment 492192
Awesome. It would be very helpful if you could let us know what car, year and battery type you have. And most importantly, what software version you are on.
Same here. But these issues keep coming with every winter time....I have not noticed any difference. Same behavior as always.
Well the reality is it is not the regular updates causing failures, that memory can handle many erase/write cycles, what it can't handle is Telsa using it to data log constantly and unnecessarily. One or two updates a month won't kill it, hammering data to it constantly will (is).
Also, no garage in either scenario.I may be speaking too soon but with the 40.50 update I literally have not had any limited regen. I live in Washington DC and it’s been cold. The first time I noticed it I had limited regen and parked the car and applied the update. Two hours later, in the evening still, I had no limited regen and thought that was curious. Then this morning, I got in the car after preheating for 20 minutes and no limited regen. I hope this is a permanent update or not a fluke on my part.
It certainly was limited to 50kW max for years. An update early this year was the first to allow > 50kW regen (as shown on the energy display anyway). This is my experience with my April 2016 S75D. Maybe when they first increased the maximum allowable power they screwed up the temperature relationship.Thanks!
I thought max regen was limited to 50 kW and didn't realize max regen goes up to 100 kW!
That explains why I feel such a big difference when driving with the barely available regen after a recent software update.
It certainly was limited to 50kW max for years. An update early this year was the first to allow > 50kW regen (as shown on the energy display anyway). This is my experience with my April 2016 S75D. Maybe when they first increased the maximum allowable power they screwed up the temperature relationship.
It certainly was limited to 50kW max for years. An update early this year was the first to allow > 50kW regen (as shown on the energy display anyway). This is my experience with my April 2016 S75D. Maybe when they first increased the maximum allowable power they screwed up the temperature relationship.