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Tesla exaggerated EV range so much that drivers thought cars were broken (arstechnica.com)

submitted 1 year ago by stopthatgirl7@kbin.social to c/tech@kbin.social

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Inundated with complaints, Tesla created "Diversion Team" to cancel appointments.

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[–] NotMyOldRedditName@kbin.social 7 points 1 year ago* (last edited 1 year ago) (7 children)

This is really the EPAs fault for real world numbers.

Real world driving conditions especially on highways where people want to get the stated range have higher speeds than what the test tests.

If you want the EPA number to match real world speeds make the test run at real world speeds.

If you want the population to know EVs run worse in the cold, have a cold weather test be part of the test and require reporting the number. It'd showcase how good the cars heating system is and help people make a decision.

The EPA probably wanted auto manufacturers to be able to report higher numbers and incorrectly chose a lower speed. WLPT numbers are even worse for being wrong (but if I recall, the wrong is more consistent)

[–] Madison_rogue@kbin.social 10 points 1 year ago (6 children)

"Tesla years ago began exaggerating its vehicles' potential driving distance—by rigging their range-estimating software," The company decided about a decade ago, for marketing purposes, to write algorithms for its range meter that would show drivers 'rosy' projections for the distance it could travel on a full battery, according to a person familiar with an early design of the software for its in-dash readouts."

Once the battery fell below 50 percent, "the algorithm would show drivers more realistic projections for their remaining driving range."

This has nothing to do with the EPA, and everything to do with the car's battery management software.

[–] agent_flounder@lemmy.one 1 points 1 year ago (1 children)

That's seriously sucky. Also I swear I've had two or three cars whose gas gauges behaved similarly--Slow decrease until half then rocketing down to E from there.

[–] Eavolution@kbin.social 1 points 1 year ago

There is a reason for that I've heard before. The fuel tank isn't uniformly built, the top half of it is physically wider (therefore bigger) than the bottom half. Not sure why manufacturers couldn't build this into the gauge though.

From my experience, my car doesn't do that, but what it does do is the needle stays at full for 20-30 miles and only then starts moving.

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