Charge in Standard, Drive in Range

[Aspirant]

We've all heard that range mode decreases battery life and why. But it seems to me that charging in standard mode and driving in range mode would extend battery life — so long as you don't bottom-out the battery. The increase in battery life would result from range mode's 50% power reduction, resulting in a more lightly used battery.

Sorry if this was discussed ad nauseam elsewhere. I searched the forums for an hour but didn't find anything.

[strider]

Technically your theory is correct. Range mode's reduced power could result in slightly lower battery temps which would in theory prolong battery life. However, Tesla very actively manages battery temperature regardless of mode so I believe the difference would be immeasurable.

[Jason S]

Interesting idea and relevant to Model S as well, I bet.

I think the power reduction is available power reduction. Therefore you could drive just the same and have equivalent efficiency. Just don't hit the go pedal very hard.

But if you need the help in keeping your foot off the floor, then I see no harm in charging in standard and driving in range.

[Dragon]

Well, in hot summer days range mode will allow the battery to get hotter. I would always go with standard mode if you don't need more range, simply because it's the standard and should be the best for the car.

[dsm363]

I believe that's something Tesla recommends against doing. You're better off staying in standard mode when you don't need the extra range.

[Aspirant]

Technically your theory is correct. Range mode's reduced power could result in slightly lower battery temps which would in theory prolong battery life. However, Tesla very actively manages battery temperature regardless of mode so I believe the difference would be immeasurable.

Temperature is not the only factor in battery wear. There is also just plain use: charging and discharging. Fifty % less available power results in less overall battery use.

[Aspirant]

I believe that's something Tesla recommends against doing. You're better off staying in standard mode when you don't need the extra range.

Tesla's recommendations amount to best practices for drivers who want to apply minimal thought to the car's operation. Those who care to understand the principles at work can optimize.

[wiztecy]

From what I read and learned Lithium Ion Batteries don't like always being at 100% nor being at 0-5%. Their sweet spot and where they're most stable charge is 50%.

When you charge in Range mode you're charging up to 100% of the packs full capacity. Secondly range mode will allow discharging of the battery pack down to almost 0%. I recall a Tesla rep telling me that they had a customer who came in with 2% charge which was a little scary. Standard mode charges bring the battery up to 80-86% and only allows it to discharge down to 20%. So that's closer to the 50% sweet spot the battery cells like. Lastly when you charge your car every night don't charge it as soon as you come home nor at 12 am, all to have the car sit at 86% or 100% all night with nothing to do. Again the cell's don't like that over time sitting above 50%. Get in the habit of having the charge complete 1 hour before you're ready for your commute or depart on your trip. This was shared by a Tesla employee who contributed to technical discussion here on TMC about steps for caring and preserving the life of your battery pack as well as on other EV forums. It makes sense. If you're on a time / PG & E E-9 rate that has a discount from 12am-7am calculate so that the charging ends at 7am. Every little bit of care and planning adds up over the lifetime of the pack.

Below are some good "general" links for understanding and caring for the battery packs:

Eight Tips to Extend Battery Life of Your Electric Car | PluginCars.com

Battery Information Table of Contents, Basic to Advanced

Table of Contents for Batteries in a Portable World

The Three Laws of Batteries (and a Bonus Zeroth Law) Cleantech News and Analysis

[richkae]

I want full power available all the time, but want the battery preservation characteristics of standard mode.
It is important to school the muscle car guy when they appear behind you on the on ramp.
I frequently flip the car to performance mode while driving and then back to standard for charging.

[wiztecy]

"It is important to school the muscle car guy when they appear behind you on the on ramp."

I agree, that's fun