I did ask and he said it degrades the battery. And of course, he has also read that charging to 100% only causes mild degradation after 200k miles, so really, the only possible answer is "because he's an engineer"
Source: Check Out This Used Tesla Model S With A Brand New Battery ... Sean has been waiting to have the battery replaced on his used Tesla Model S. It finally quit on him at around 130,000 miles after he fast-charged it to 100 percent multiple times a day for about three years. Sean’s job requires many miles away from home, and his high-mileage 60-kWh battery pack just wasn’t enough to provide the range he needed. His only choice was to hit up Superchargers a few times a day and further degrade the battery pack. Even if he did know better, he really didn’t have another option. Good news! Now he does … Bob Wilson
i'm confused. is 80% in a tesla closer to what toyota does with their software? does tesla allow real 0-100% customer controlled charging?
$50,000 for any car is not a money saving strategy. If that is a baseline, a $20,000 Prius will save you $30,000. That will fill a George Costanza wallet any day. With money. I welcome the backache from a hip national bank with $30k in it.
If 80% is the limit, that is 100% of usable power. I am pretty sure that the 80% limit is pretty standard in any device that has good management.
Yes. Tesla allows you to charge up to 100% (which is actually probably about 97%). But when you set it to charge that high you get a warning on the screen that says to only do it sparingly for long trips.
so then, what mileage does tesla advertise, 100% or 80%? and do they disclose this to potential buyers? or another thought, is there an eta distance?
The early Leafs allowed is, but Nissan changed to to just having the long range setting is order to not have the shorter range of the lower charge out there for the public to see. I suspect the EPA range for a Tesla is for 100% charge. My math for the 75kWh Model S is from the EPA site numbers is coming back at 82kWh for the 249 mile range. Then it was reported that the long range 3 rating is actually lower than it is capable of to not out shine the S. I'm sure Tesla discloses this somewhere. They also have the chrage calculator for their cars on their website.
Regarding the second question...Tesla obviously has a "range remaining" number constantly staring you in the face. But if you also put a destination in your navigation it will tell you exactly what percentage you will arrive with, constantly adjusting as needed. It will even tell you to slow down if you are cutting it too close.
The EPA tested the model 3LR at 334 mile range at 100% SOC and Tesla could have posted that number. However, they decided to post a number of 310 mile range to better reflect real world expectations. I believe that Tesla is the only EV company to voluntarily post a lower EPA number. Why is it near impossible to achieve EPA numbers in an ICE vehicle? Do they disclose that to potential buyers? There is an ETA distance on the U.I. that is updated in real time based on current speed, topography, and climatic conditions with suggested speed necessary to reach the nearest supercharger.
sorry folks, spellcheck changed epa to eta. if tesla says using 100% a lot is bad for the battery, perhaps they should advertise 80% of the epa. 334 x .8 = 267 miles
For comparison, range for ICE cars is typically stated as EPA MPG x fuel tank capacity. Many people recommend not letting an ICE run near empty because it's bad for the fuel pump, but nobody is saying range should be adjusted for that. I'm pretty sure most people don't actually know the specified range of their ICE cars. I looked up the range on my Mustang (which has by far the shortest range of my current fleet) and that's ~370 miles using the highway MPG. On road trips it will regularly go 300 miles between fillups with a 50-ish mile reserve, so I'm typically using ~80% of the maximum range just like a Tesla. However, the unused 20% in an ICE is available as reserve in an emergency. The uncharged 20% in a Tesla isn't. I'm also starting with a longer ideal range, so even though it may get smaller in less than ideal conditions it's still further than a Tesla can go in those conditions (assuming highway travel).
I get where you are coming from, but I think there is already enough confusion around BEV's to add another layer. Easiest just to say what the car can actually do. If we started to go down giving caveats then there would have to be a whole list of things like what range the car will have in winter, in rain, in wind, at different speeds. That's just my opinion though.
this is what happens when you don't hang out on priuschat and soak up the knowledge from experienced users, before making a purchase
The variation is accounted for in the calculation of an average. Averages are not promises. And any given single data point may be significantly different than the average. It's like this: If 98.99999% of people will never get lung cancer, it is still 100% lung cancer for the 0.00001% who do get it.
If you are going to be driving 334 miles in a model 3 in a day, absolutely charge to 100%. What is not recommended is charging to 100% on a daily basis for those frequent maximum 20 mile days. LION batteries have the longest life when the AVERAGE daily charge is 50% (say for example 80% charge at start of the day and 20% charge at the end of the day). And then there is the issue of which car will you be safer in driving 300+ miles in a day, the Mustang or the model 3?
