Charge and let sit over night or scheduled departure charge?

[chowee21]

Hello!

If I get home at 2 PM with 40% and don't need to drive until the next day at 9AM, is it better to go ahead and let it charge up to 80% (i actually charge to 75%) and let it sit overnight OR should I just do a "depart at 9AM" scheduled charging in which it would charge right before departure?

In other words, is it better to let it sit at 40% or charge to the upper limit and let it sit.

I saw this data below which suggests departure charging as the battery would be under less stress at a medial charge state, but just wanted to here what others thought.

 

[shahryaran]

Calendar aging is more harmful than cyclic aging.

Is battery calibration pointless?!

Let's say your car has some amount of battery degradation and you can't get the range you want. You were told to calibrate battery and you may get some range back. Here is the thing... It doesn't matter and don't worry about it. The fact is that the actual amount of battery capacity is there...

teslamotorsclub.com

 

[E90alex]

For optimal battery health (least degradation), you want to charge late. The more time spent at lower SoC the better. And if you get home with 40% or more then you don’t need to charge to 80% each time so consider a lower charge limit if you are concerned about degradation.

If you’re not very concerned about degradation then don’t worry about it and do whatever is most convenient.

 

[ucmndd]

If your electric plan, schedule, etc. allows it, there are benefits to charging finishing shortly before you depart.

Storage at lower states of charge is all-around better. Leaving with a warm battery enables more regen braking, better efficiency, etc.

 

[jcanoe]

Charging after 9 PM or so and before 7 AM is usually a time when the load on the local electric utility grid is less. Charging during this window can also net you lower charging costs if you participate in a time of use (TOU) rate plan.

Some battery warming does take place while charging so in winter it is more efficient to use Scheduled Departure - Charging so that your Tesla vehicle will complete charging just before your leave for your A.M. commute. If there is an off-peak window that ends at 0600 or 0700 you don't want to be charging after that time as it would increase your charging costs.

Using Scheduled Departure - Preconditioning may work well for you if you leave home at approximately the same time each A.M., Monday through Friday or every day. Otherwise, you can precondition manually using the Tesla app. Battery warming will take place as required during preconditioning. Otherwise, preconditioning to warm the passenger cabin takes ~10 minutes. Battery warming used to be a bigger deal before driving in winter as this was how you could ensure partial regenerative braking when driving in cold weather.

Tesla added a feature under Pedals & Steering that you can now enable that will automatically blend the friction brakes with regenerative braking whenever regenerative braking is reduced or unavailable (due to the battery state of charge being too high or typically when the battery temperature is below 20C (68F).) When this feature is enabled you don't notice any difference in how the Tesla vehicle slows when you lift your foot from the accelerator when regenerative braking is reduced or unavailable. This saves time preconditioning, reduces energy consumption and can save you money as you don't need to precondition for nearly as long as in the past to have some amount of regenerative braking in cold weather. The Tesla vehicle will display a blue snowflake next to the battery indicator when the battery is cold. You can drive with the blue snowflake and not notice a lack of power under normal driving.