3 ms·
One thing to note is that for many people, a standard 120 volt 15 amp outlet will be enough for day-to-day usage. In a Tesla, that gets you ~5 miles/hour of cha
by ericd 5y ago
One thing to note is that for many people, a standard 120 volt 15 amp outlet will be enough for day-to-day usage. In a Tesla, that gets you ~5 miles/hour of charging speed, so if you leave it alone for ~14 hours, there's 70 miles of range added.
So maybe an extension cord and a normal outlet gets you what you want.
- dheera 5y agoI've heard anecdotally 1-3 mph from Tesla owners. I'm not sure if they were doing something wrong though. i.e. not enough for an average roundtrip bay area commute.
- m463 5y agoThe mph number when charging is a made-up number. I think it is a fixed number for the type of vehicle, and will not reflect anything variable like temperature or driving style/history. The fixed number seems to depend on the car. It would be higher for a model 3 and lower for a model X. And I'd guess that a large performance model X on wide tires in a cold climate might not get the same miles from a kilowatt as a standard model 3 with aero rims in a temperate climate.
- dheera 5y agoI imagine if their engineers were any good the mph number would collect data on the user's past trips and make increasingly better estimates in the future about the translation between kWh and miles for the specific user. Obviously a user in Kansas would get more miles per kWh than a user in the Swiss Alps but the vehicle has data on where all the user has driven and how many kWh were used at every instant since it was purchased.
- m463 5y agoI think that value for the charging speed is really important enough scale. Meanwhile, there are a few ways to view battery charge: - miles of range remaining (the default) - ideal miles of range remaining - percentage. Turns out, percentage is a much more rational way to view battery charge. Charge to 70% or 80% is absolute and graspable. Charging to range is variable and not really that helpful. Maybe if you are a really consistent and conservative driver it would work for you, but I've found it to be unpredictably inaccurate and leads to confusion.
- m463 5y ago> I think that value for the charging speed is really important enough scale. sorry, NOT important enough to scale
- ericd 5y agoI’d say this is too strong a take. The mph number is certainly not completely accurate, but it’s also not made up out of whole cloth. The number I was quoting was for a Model Y, a Model 3 will have better, X will have worse. Given that 3’s and Y’s massively outsell S and X, it’s a reasonably conservative choice. The mph number is overstated if you use AC/heat, and/or travel >75 mph. But it’s not more than 30% off in my experience. It should do pretty well in the Bay Area where the weather tends to be mild.
- m463 5y agoMaybe I could say "rough estimate". When charging it seems to be a fixed multiplier vs the instantaneous kw charging rate.
- ericd 5y ago5 mph is what I’ve seen in practice on a Model Y. That figure is generally an overstatement of real range, but not by too much. Definitely depends on the commute length.