this post was submitted on 24 Oct 2023
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Sort of yes and sort of no.
Tesla displays the vehicles "range" as the EPA range minus any battery degradation. The number doesn't fluctuate otherwise.
However, if you plus a destination into the trip computer, it actually computes the estimated efficiency and you can estimate the range from it.
Every other EV instead has a "guess-o-meter" which estimates the remaining range of your car based on current driving habits and derived efficiency by looking at the recent X number of miles driven.. this gives you a good range estimate which automatically factors in recent weather, terrain and driving habits. It also takes into consideration your current battery health.
Only the trip computer is particularly accurate. Tesla has theirs, while everyone can download the app abetterrouteplanner.
Personally, I think it's a relatively non-issue. Rather, there is a methodological difference between estimating the range. Gas cars, otoh existed for 100 years without having a range estimator.
Yeah, it's top line number is basically the estimated range at 250WH/mi given the cars estimate of battery capacity.
It's not hard to get or even beat 250WH/mi in good weather on relatively flat highway if you are moderately careful about it. It's definitely an upper limit though, which I think is appropriate. I don't care how much range the car has with a lead foot. Top Gear showed that an M3 can get better mileage than a Prius when both are doing performance laps, so that's kind of just a dumb way to measure range/efficiency.
Exactly. I don't think Tesla showing the EPA range after degradation and state of charge is anything to be concerned about. If there's a problem with doing that, then the problem lies with the EPA/regulations.
I'm not sure what this whole different numbers at 100% vs at 50% is unless they do turn on a guess-o-meter if you reach 50%, or maybe Tesla is fudging the battery degradation to show a higher 100% and then adjusts it as you start driving, but either way, I don't think it's the big deal this articles title is trying to make it out to be. The number at 100% will be accurate to the EPA test cycle on a new vehicle, and I think that's the critical piece here. They aren't lying about that. The numbers have been audited.
I do still think we need better more accurate EPA tests.
Edit: Actually if they are lying about the level of degradation to fudge the numbers, that could impact warranty claims and the 30% threshold, so that would be bad.
Some people have complained that their Tesla does half the estimated / EPA range when they drive in winter. If those complaints are accurate then it's a valid complaint.
Everyone knows range is weather affected, but not by half. If it's that bad then people need to be told - they shouldn't find out when they get stuck with a flat battery on the side of the road in a snow storm that they probably shouldn't be driving in. That's dangerous and it will happen if the range estimate says you have more than enough charge to reach your destination.
It would probably make sense for the EPA to have a cold weather test to help give a better picture.
Cold weather really isn't 50%, especially with the heat pumps. Like maybe on a non heat pump, if you don't preheat, and have a lead foot directly onto a highway, but even then.
All that said, none of that is the doom and gloom of the title if that's all it is.
I still think the real risk is from AP/FSD.
This range thing probably won't result in anything significant