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More frequent shorter charging time or less frequent longer charging time?

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Assume you drive only 30-50 miles per day and that your objective is to minimize battery degradation and otherwise maximize battery life in general. In that case, is it better to charge every day for a short time period to recover each day's 30-50 miles? Or is it better to charge only once every several days when the battery gets near depletion, in which case each charge time would require a longer duration? Or does it not matter?
 
Assume you drive only 30-50 miles per day and that your objective is to minimize battery degradation and otherwise maximize battery life in general. In that case, is it better to charge every day for a short time period to recover each day's 30-50 miles? Or is it better to charge only once every several days when the battery gets near depletion, in which case each charge time would require a longer duration? Or does it not matter?

That's a good question, and I don't have the answer... but I do the latter. I charge a couple times per week and just let the car sit (with nightly sleep enabled) otherwise. I think it might be better for the battery to stay at a middling SoC, but unsure if I'm throwing anything out of wack either. Certainly when I do range charges I get some odd numbers (like 254 on max, but range doesn't go down until I've driven for a while), but I don't know if that's the battery or software.
 
Assume you drive only 30-50 miles per day and that your objective is to minimize battery degradation and otherwise maximize battery life in general. In that case, is it better to charge every day for a short time period to recover each day's 30-50 miles? Or is it better to charge only once every several days when the battery gets near depletion, in which case each charge time would require a longer duration? Or does it not matter?

Best would be depleting to half charge range and charging enough to add the 30-50 miles per day (short charging more often), with occasional charges to full (leaving on charger for 24 hours or so to rebalance occasionally, like once a month or once a quarter)

Good would be charging to full, discharging to half, charging back to full (longer charges, less often charging). It isn't as good for the battery as riding the middle of the pack but you are driving a Tesla, the difference would be minor.

Bad would be depleting to 0 miles range remaining and charging to get back the 30-50 miles per day. Driving around on low charge levels would be hard on the battery.

In short its more important what the average charge level is than it is how often you charge. You want to avoid spending much time at the bottom 20% or top 10% of the pack. Better to be full than empty, better to be mid pack than full.
 
More frequent short charge/discharge cycles wear the battery less for the same power consumption than fewer deeper charge/discharge cycles. Tesla's guidance says, "Charge when the opportunity presents." So I charge my 85 kWh to about 210 miles each night.
 
The best practice is to charge as frequently as possible. This keeps the depth of charge as small as possible. So, charge whenever you can. I have been doing this and my range degradation at 33.5K miles is negligible.
 
More frequent short charge/discharge cycles wear the battery less for the same power consumption than fewer deeper charge/discharge cycles. Tesla's guidance says, "Charge when the opportunity presents." So I charge my 85 kWh to about 210 miles each night.

The best practice is to charge as frequently as possible. This keeps the depth of charge as small as possible. So, charge whenever you can. I have been doing this and my range degradation at 33.5K miles is negligible.

^^^^ what these guys said. charge as frequently as possible to minimize the depth of discharges. this will extend the battery life as much as possible.
 
That was more of a Roadster thing. Every single ranger visit would have a card with 'A plugged in Tesla is a happy Tesla' or something like that.

The postcard-size card showing a picture of a Model S plugged in saying "A connected Model S is a happy Model S" was in my Model S when it was delivered in July 2013. Lots of people reported that last summer. I guess they stopped doing it.
 
I just got delivery of my car and I did not get any of those cards from the Dallas Service Center.

My every day commute equals 85 miles and I did not realize that I have to plug it every day.

Out of 3 days I have charged only once.

I did move the bar to 90% charge.

Thanks guys
 
I just got delivery of my car and I did not get any of those cards from the Dallas Service Center.

My every day commute equals 85 miles and I did not realize that I have to plug it every day.

Out of 3 days I have charged only once.

I did move the bar to 90% charge.

Thanks guys

For a commute like yours, I would set the bar somewhere between 70% and 80% and plug in every day. That way you have plenty of reserve for your daily drive and can forget to plug in for a day with no concern. When you need to go on a longer trip, just raise the bar. Keeping the bar a little lower on a daily basis will most likely give you a little more battery life.

Enjoy your new Tesla!
 
I just got delivery of my car and I did not get any of those cards from the Dallas Service Center.

My every day commute equals 85 miles and I did not realize that I have to plug it every day.

Out of 3 days I have charged only once.

I did move the bar to 90% charge.

Thanks guys

It's also in the owners manual in the About the Battery section:

"Model S has one of the most sophisticated
battery systems in the world. The most
important way to preserve the Battery is to
LEAVE YOUR MODEL S PLUGGED IN
When you are not using it."

and

"There is no advantage to waiting until the
Battery’s level is low before charging. In fact,
the Battery performs best when charged
regularly"

It reallly is useful for new owners to read the manual. This is not like any other car you have ever driven.
 
For a commute like yours, I would set the bar somewhere between 70% and 80% and plug in every day. That way you have plenty of reserve for your daily drive and can forget to plug in for a day with no concern. When you need to go on a longer trip, just raise the bar. Keeping the bar a little lower on a daily basis will most likely give you a little more battery life.

Enjoy your new Tesla!

I read some where in the forum ( I believe the thread name is degradation of battery or something like that) where the battery needs to be charged at 90%. I do understand the manual says anywhere between 50-90% but lot of users posted that degradation of the battery was minimal at 90% charge.

- - - Updated - - -

It's also in the owners manual in the About the Battery section:

"Model S has one of the most sophisticated
battery systems in the world. The most
important way to preserve the Battery is to
LEAVE YOUR MODEL S PLUGGED IN
When you are not using it."

and

"There is no advantage to waiting until the
Battery’s level is low before charging. In fact,
the Battery performs best when charged
regularly"

It reallly is useful for new owners to read the manual. This is not like any other car you have ever driven.

I did read the manual before I took delivery...some how skipped on this part.. Thanks for reminding me... Will read the manual again... Anything for this amazing car
 
I read some where in the forum ( I believe the thread name is degradation of battery or something like that) where the battery needs to be charged at 90%. I do understand the manual says anywhere between 50-90% but lot of users posted that degradation of the battery was minimal at 90% charge.

90% as a daily charge is good for reducing battery degradation, but 80% is better. Your daily commute is probably going to use 35-45%. Call that 40% and your daily cycle will be charge to 80% at home, use to 40% during a typical day, repeat. That is a nice gentle cycle on your battery.

For the battery to be fully calibrated and balanced, you need to do a couple of 100% charges every once in a while, but not doing that does not hurt the battery and probably helps it as long as you don't want squeeze out every mile in a hypermile adventure.

Enjoy your S!