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Thanks for the info. I know there is an approximate number of charging cycles for a mo 3 l/r battery and I believe its 15,000. If you plug in each night in the winter (3 months), does each night count as a changing cycle? I only drive 50 miles round trip to work but have read the car should be plugged in each night in the winter. Sorry for all the questions.There is no function to "keep the battery warm" when plugged. You can either plan you charging so that it starts a bit before you leave (scheduled charging or scheduled departure) or you start the cabin heating some time before you leave. Charging will warm the battery in itself, and the car will heat the batteries before charging if they are too cold. heating the cabin also preconditions the battery up to ~20C. If during the heating your car falls below your set charge %, it will start charging if it's plugged in.
Thanks for the info. I know there is an approximate number of charging cycles for a mo 3 l/r battery and I believe its 15,000. If you plug in each night in the winter (3 months), does each night count as a changing cycle? I only drive 50 miles round trip to work but have read the car should be plugged in each night in the winter. Sorry for all the questions.
This is a helpful post. I get what you are saying about the battery rabbit hole, but I think it is a bit more important to understand how this works based on where you live. For example, I live in Minneapolis,MN and my garage is attached but unheated. It will get and stay below freezing in the garage multiple days per year. Coldest I've seen is 2F degrees. So in my case, I would expect it will be important to use the scheduled departure and preconditioning or my range may be limited. And I'm guessing I will use more energy just to get the battery up to a temperature where it will charge. Still waiting on the car.
That’s great, thanks.If it's not a hindrance, leave it plugged until you need it. The recommendation is mostly for cases where you'd leave it for a long time, so it doesn't completely discharge. But there's no harm in leaving it plugged. It will top up when it needs to.
Thanks for the info. I know there is an approximate number of charging cycles for a mo 3 l/r battery and I believe its 15,000. If you plug in each night in the winter (3 months), does each night count as a changing cycle? I only drive 50 miles round trip to work but have read the car should be plugged in each night in the winter. Sorry for all the questions.
"A plugged-in Tesla is a happy Tesla!"Just took delivery on a M3 LR and I have a basic question. I understand about scheduling charging, but do folks leave the car plugged in even after the car hits the set charging limit if the car is not going to be used for a bit. I thought I read in the manual that Tesla recommends that the car remain plugged in even if the car is not in use.
Unfortunatrly that is not true as over 10% degradation is completely normal after 15k miles.A frozen battery is a bad thing - thus, when the battery gets close, the car will wake up and automatically heat it.
A cold battery is an inconvenient thing - regen will be limited, performance will be limited, etc. People who live in Cold climates like MN have various techniques to warm up the battery before they leave in the morning - for example, using the Scheduled Departure feature will start charging such that the car is done just about the time you're ready to leave in the morning, thus the battery will be warm and everything will be good.
Heating the battery takes a bit of power - but it costs me only about $6 to put 300 miles worth of charge in my car. Adding $0.25 to heat the battery (which, by the way, isn't something I ever need to do...) would be a no-brainer.
There is no problem with leaving the car plugged in. Your car has the worlds most intelligent charger; it'll charge up to the level that you set, and stop charging. This isn't like battery operated tools from the 1990's, where leaving it plugged in for weeks would cause permanent battery damage. For a Tesla, you could leave it plugged in for years and it would be happy the whole time.
The cycle life for a Lithium-Ion battery, as others have noted, is based on a 100->0->100% charge cycle, and is normally given as the point where the battery is only capable of 80% of the capacity it had when it was new. 1000 cycles is a fairly normal specification for LiIon batteries - if you assume that a 100-0-100 cycle represents 310 miles (my 2018 LR RWD rated range), that's 310*1000 = 310,000 miles of travel. And at that point, the batteries should still be good, but you may only have (310*80%)=250 miles of range. Not really something to worry about, unless you routinely drive 100,000 miles a year...
Sadly for much of the country, we don't have some of the lowest electricity rates in the US. In MA, our electricity costs are triple those of AZ.$6 to put 300 miles worth of charge in my car.