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Comment by bottlepalm | Hacker News Reader

I've driven 20k miles in a Tesla LR Y, it's rated at 250 Wh/mi, and my lifetime average is 275 Wh/mi - easily visible in the navigation section of the car.

What Wh/mi number is this article even claiming? It's nowhere to be found. Obviously cold weather affects range, but the article is also claiming the warm weather range is also diminished?

The Tesla trip planner aside from being ridiculously accurate, has an option to show your energy usage versus the rated 250 Wh/mi, as well as the consumption graph has a 'rating' line. So you're aware while driving how your car is performing compared to what it's rated at. It's not like Tesla is trying to hide these numbers at all.

Other people here want to give their lifetime miles and average Wh/mi number? Since this article doesn't.

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Just to pile on, I have a 2017 Model X 100D that I've driven nearly 50K miles. EPA rating is 390wh/mi, and my lifetime average is 340wh/mi.

If anything, my dashboard range is overly conservative. I normally arrive at superchargers with ~5% more range than estimated, and I don't drive slow either. Typically 75-80mph on road trips.

The one point I'll give them is that when its below freezing, my range suffers (400wh/mi or so, which is still not much worse than the EPA estimate).

2019 mp3. EPA is 290 wh/mi [1]. I currently have:

  - 278 wh/mi for 28K mi total. 104% of EPA.
  - 259 wh/mi for the last 6K mi. 112% of EPA.

[1] https://www.fueleconomy.gov/feg/Find.do?action=sbs&id=41191

I haven't done quite as well. Over 25k miles Teslamate shows 311 Wh/mi average. The car's in the PNW and we put snow tires on it over the winters and have taken more than a few road trips with a box top and/or bike rack. And yeah, we get 80% of rated, which isn't surprising to me. You can look at individual drives and see it do much better (e.g. a steady 50 mph on a rural road at 70F does quite a bit better than average, and that corresponds pretty closely to the EPA test conditions), and a few hilly trips in cold rain which are efficiency disasters.

I don't know what this article is talking about either. It's the Brand People Love to Hate.

My 2021 Model Y LR says 297 Wh/mi over 42.7k miles. * I live in southern Wisconsin (temps swing from -20F in February to 100F in August) * Gemini snow tires November through April, Inductor wheels otherwise * Source: The odometer matches Trip B, never reset.

I'm much happier with the screen reporting % state of charge instead of EPA miles remaining.

Mine is 318wh/mi over my last 5,700 miles, mostly on the freeway. Is there a lifetime number displayed, I see only trip a/b numbers.

Getting 50 or 60% of the expected mileage seems impossible. Maybe driving 80 mph constantly speeding and slowing up in below zero Fahrenheit weather? My s is 8.5 years old.

I'm getting way better than the article does.

That's a SR Y right? My lifetime is 155 W/km which is about 249 W/mi. Same with my mates. We are in NZ so battery is LFP and pretty suited for mild climate.

I am always suspicious of that number - whenever I start to drive the efficiency of the drive is more along 200-230 W/km. I assume its climate controls. Sentry also chews into battery a bit.

Since there’s lots of confusion here I believe two things are true at the same time, 1. Tesla has a great estimate of the battery Wh/mi when navigating or driving, 2. I think what is shown as Wh/mi is misleading if you only track power dissipation -while driving-. A parked Tesla is not consuming 0 W… and I believe this is the point. The article appears to show that reduction from idle power consumption when the car is parked is substantial. If you expect to use all the battery Wh for driving off a single charge, the article claims you can only really get a total value of 50-60 percent of that in typical drive scenarios (eg commute for 1hr, park, drive home, etc until end of range).

My S lifetime Wh/mi is 260. I live in Florida and frequently drive on I-4, at typical speeds to the surrounding traffic, with AC set to 72.

Do you mean Wh/mi? I don’t even know what W/mi would mean as a unit here.

Electrical energy at the battery terminals per mile traveled?

So here's a question: is that what the car is telling you or what you've measured independently outside of what the car is telling you?

It matters because in recent history VW is mostly famous for making the car report erroneous data about their "clean diesel".

I don't doubt you're potentially sharing a real "truth" here, but software can lie through it's teeth.

My ebike gets better than 20wh/mi. Really puts into perspective how inefficient these super heavy electric cars are.

Light e-mobility is the future. E-bikes are already 2X the "regular" bike market in the US. E-bikes put lower density areas within bikeable range. That's still only 5% the size of the car market, but it is rapidly growing, while car sales are stable or declining.

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