Since the 40kWh Model S uses a 60kWh pack that is software limited, is Tesla keeping the SOC right in the heart of the sweet spot so that there is practically no wear on the cells? Is there any data out there about lost range on the 40s?
You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Rumor has it that the SC will do a 100% charge (of the full 60kwh) for you during your annual service appointments if you request it.Yes and no. The 40 only charges to 69% SOC which is well under 4 V per cell. Trouble is that the 40 never top balances.
Geez, with all the recent hacking, you'd think someone would have figured out how to turn a 40 into a 60 or at least allow it to charge to 150% (100% charge of 60).
The 40 is literally a 60 where you can't move the charge slider above the 70% mark. They don't even have a different UI for it. So it never shows 100% normally.
If you somehow did managed to charge it to 60kWh, it would then be at 100% - not 150%.
150% in software relative to it's 40kWH maximum.
Has anyone tried setting it to higher than 100% through the REST API?
Geez, with all the recent hacking, you'd think someone would have figured out how to turn a 40 into a 60 or at least allow it to charge to 150% (100% charge of 60).
Again, it doesn't report 100% anywhere. Not in the UI. Not in the phone. Not anywhere. You simply have a battery which you can't fully charge. Other than that one upper limit on the set, the car thinks it's a 60.
So the challenge through the Rest API won't be to set it at 101%, but to set it at 71%. The phone definitely doesn't allow you to set it at 71%.
I can't imagine anybody at Tesla being so stupid as to put that check in the UI instead of on the server, but it's worth confirming. And if they really did that, we should seriously ourselves if we trust a company who would do something like with the software that is between the accelerator pedal and the motor?
I can't imagine anybody at Tesla being so stupid as to put that check in the UI instead of on the server, but it's worth confirming.
So you're saying that the UI only reports 69%? So it doesn't map 69% of actual charge to 100% of virtual charge? Is that done as a constant reminder that they could upgrade?
From a daily driving standpoint, there's not a 20kWH difference between the 40 and 60. You wouldn't change a 60 up to 100% every day but rather 80 or 90%. But there's no reason not to change up to 69% every single day. Interesting.
Yes and no. The 40 only charges to 69% SOC which is well under 4 V per cell. Trouble is that the 40 never top balances.
The objective of cell balancing is to keep every cell at the same voltage level. Being so, you can balance the cells to 3.9 Volt if you want to. It is not an actual recommendation if you want to optimize lifetime of your battery (always better to balance at 100% SOC), but it is much better than no balancing.There was evidence in the hacking thread from a 40 owner that his pack does not top balance. How else do you suggest they balance if they never reach the CV charging phase?
The objective of cell balancing is to keep every cell at the same voltage level. Being so, you can balance the cells to 3.9 Volt if you want to. It is not an actual recommendation if you want to optimize lifetime of your battery (always better to balance at 100% SOC), but it is much better than no balancing.