Tesla accused of deliberately overestimating EV driving ranges

Daniel Sims

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A hot potato: Range anxiety – unease over the maximum driving range before needing to recharge – has been a primary roadblock facing electric vehicle adoption. An extensive new report from Reuters claims that leading EV manufacturer Tesla has used overly optimistic range estimates and instructed staff to divert range-related complaints, but the current status of these policies is unclear.

Sources have told Reuters that Tesla at one point employed algorithms to give customers exaggerated estimates for the maximum driving range of its EVs and dedicated an entire office to silencing complaints on the issue. It isn't known if Tesla still uses the algorithms, but third-party testers recently claimed the cars fail to meet their advertised ranges.

The practice began around a decade ago for advertising purposes and was directed by Tesla CEO Elon Musk. The inflated numbers would appear on a vehicle's dashboard while at or near full charge but would switch to a more realistic estimate after falling below 50 percent, which could give drivers the impression that the range is dramatically sinking.

Part of the issue is that Tesla's numbers don't account for environmental conditions, which can significantly impact driving range. Cold weather has an especially acute effect on EV batteries, potentially cutting their range in half. Other factors like extended periods of high-throttle driving, steep inclines, and headwinds can also shorten the time between recharging. The company does, however, host information about conditions that affect driving range on its website, and recent updates to its EVs display more information about battery consumption.

Although word of the policy has only recently emerged, Tesla has previously gotten into trouble with regulators in the US and South Korea over the issue. The range estimates required to be displayed on EVs for sale in the US typically come directly from the EPA (Environmental Protection Agency), but Tesla uses internal testing.

Since 2020, the EPA has required the company to revise its numbers by around three percent. In January, the Korea Fair Trade Commission fined Tesla $2.2 million for failing to tell customers about the effects of low temperatures on EV batteries and forced the company to admit false advertising.

The mismatch between advertised ranges and the ranges many drivers experienced in the wild led to so many customer complaints that Tesla opened a division in Las Vegas devoted solely to diverting and closing support cases without necessarily solving the underlying issues. Employees there regularly celebrated closing cases and resorted to various tactics to do so, diverting or canceling hundreds per week.

At one point, Las Vegas staff were instructed to try to end calls within five minutes and would cancel a case if the customer didn't pick up the first time they called. Initially, employees would run remote diagnostics before telling customers their batteries were in good health, but ceased doing so in late 2022.

The company currently handles range cases through a Utah office, and it's unclear how it conducts range estimation today, but recent outside analysis still shows discrepancies. A 2021 report from Edmunds found that most Tesla models miss EPA range estimates even when accounting for the supposed 15-mile "safety buffer." Models from other manufacturers hewed closer to EPA estimates and almost always exceeded advertised ranges. More recently, an EV analytics company told Reuters that Tesla's numbers disregard environmental factors as recently as this year.

The report resembles a May incident in which an employee leaked reports of thousands of previously unknown safety and privacy complaints. The trove of documents revealed that support staff deliberately avoided leaving paper trails of the complaints by favoring oral communication and refusing to record calls.

Despite the controversy, Tesla vehicles continue to enjoy strong sales. Recent price cuts and positive performance in China helped the Model Y become the first EV at the top of the world's best-selling car list in the first quarter of this year.

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I don't know if there is a credible way to assess battery endurance. This sort of over inflating battery life practice is not new. Think about a laptop that claims 15 to 18 hours of battery life, but in reality, it falls far short of what is advertised even with very light usage. Furthermore, the cell grade and age of the battery will impact battery life even more.
 
"Part of the issue is that Tesla's numbers don't account for environmental conditions, which can significantly impact driving range."

Not only that but range estimate never defines what load the car is carrying...! Single driver with no cargo luggage, or driver with family of three and trunk loaded with luggage...! I presume it is the former...!
 
Kind of similar, I embarrassed myself at the Ford dealer thinking that they sold me the regular battery and not the extended one for my F-150 Lightning Lariat EV. My proof was that the first time I ever charged my truck to 100% it said the mileage was only 257 and not 307 as advertised. The service guy smiled and he said, "What did you set the reserve milage to the first time you used the Fordpass app?" I said "50 miles." He replied, "What's 257 + 50?" ..... "Thanks man have a great day," I replied.
 
I don't know if there is a credible way to assess battery endurance. This sort of over inflating battery life practice is not new. Think about a laptop that claims 15 to 18 hours of battery life, but in reality, it falls far short of what is advertised even with very light usage. Furthermore, the cell grade and age of the battery will impact battery life even more.
Laptops and cars are like comparing apples and oranges, IMO.

Many pre-2023 Prius Prime owners report its EV only range estimate of 25mi as being accurate with some getting much more and a few getting less. Its Tesla's marketing to sell cars. (I have no data about the 2023 Prius Prime which is rated at 44mi EV only mode.)

Tesla needs to have yet another layer of "customer satisfaction" to help their business and reputation. 🤣
 
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I don't know if there is a credible way to assess battery endurance. This sort of over inflating battery life practice is not new. Think about a laptop that claims 15 to 18 hours of battery life, but in reality, it falls far short of what is advertised even with very light usage. Furthermore, the cell grade and age of the battery will impact battery life even more.
There is. I mean, my Chevy Cruze (with plain ol' gasoline) will show my estimated range to empty based on the actual MPG I got from my previous fillups, not just reset and make up a number until I'm down to a half a tank. (This can of course be reset, like if you sold the car to someone they may not want these results skewed by your driving style.)

And reportedly, the other vehicles stay much closer to their EPA-claimed ranges than the Teslas, so apparently (if you don't play senanigans) it's entirely possible to get an accurate estimate of range. (Not accusing Tesla of anything, but part of the diesel emissions scandal years back, which besides VW also included some semi truck makers, since the EPA followed an exact driving path these vehicles could detect when they were on the EPA test path and lower their emissions.. which made them run poorly and get poor mileage, but get low emissions. They got caught when a handful of semi truck operators wondered why they'd go on a specific route, that just happened to closely mimic the EPA test, and suddenly their trucks ran like crap for a while, then a while later would run fine again, and actually looked into it far enough to find the reason. There were some biiiig fines over that one! I could see a vehicle detecting EPA range test and improving it's range.)

Even with computers, after vendors were using bogus testings (like turn on the computer and leave it a desktop, with minimum brightness, doing nothing), PC Magazine etc. developed tests... some would play a video until exhaustion, some tests would do a variety of office tasks in a loop, to get an idea of real battery life.

Really, car magazines routinely have driving loops they'll also use to get some idea of MPG (or range for the electrics), and can test in varying temperature conditions too. Of course, in the case of a Tesla if they get lower results, then the Tesla fans come out and accuse them of... well whatever.
 
The only EV out there that regularly gets anywhere close to its EPA estimated range is the porche taycan, and thats because the EPA range in estimated in performance gear, not the efficiency 2nd gear.

No other EV can hit its regular EPA range under anything but perfect conditions.

But they're the future guys!
 
Some people still cant understand that battery KM/MIL range is based on voltage and is wildly estimated. Teslas to date , have the best real world range of all EVs so crying that their estimation is wrong is pathetic. That is why we change the KM/MIL icon to % view and based on experience with the car you can estimate it yourself. I have never had a problem driving like that and always arrived with more % than anticipated.
 
If you go to the splash page for any of the EV's available in the US you'll notice under range that there is always a denotation that the listed range is an "EPA estimate". The range suggested had nothing to do with Tesla, Musk or any other EV maker or their lesser known CEO's. In the US all listed economy numbers are third party verified by the regulator, which is the EPA. If you then go to the linked EPA page you'll get a short dissertation citing the fact that range for an EV is tightly linked to driving habits, ambient temperature as well as the use of accessories in use while driving.

Long story short this is yet another non starter aimed at denigration, a few folks have pointed out across the web that this story got its start somewhere between Reuters and Yahoo finance. I'd point out that several analysts at Yahoo finance have long stated short positions with regard to Tesla stock, as for Reuters that vector is as of yet unresolved as personally I've always trusted Reuters as being a down the middle US source and I haven't as of yet seen any break down of this supposed investigative report they've done.

DaveBG basically nailed the generality of this better than I could.
 
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