Live data from Hacker News

Tesla created secret team to suppress driving range complaints (2023)

reuters.com

11–20 of 287 posts

Re: Tesla created secret team to suppress driving range complaints (2023)

#11

I have a model 3 (from 2023), that is rated 270 miles. I can get at max 120 miles, more like 90 miles from it. My drive to work involves going steeply uphill, not very cold. The only reason I don’t care is I have free office charging. If I didn’t I would be pissed by the range I observe. Also Tesla servicing is famously bad, and the way the employees treat service requests (as described in the article) explains a lot

How fast do you normally drive?

Re: Tesla created secret team to suppress driving range complaints (2023)

#15

I have a model 3 (from 2023), that is rated 270 miles. I can get at max 120 miles, more like 90 miles from it. My drive to work involves going steeply uphill, not very cold. The only reason I don’t care is I have free office charging. If I didn’t I would be pissed by the range I observe. Also Tesla servicing is famously bad, and the way the employees treat service requests (as described in the article) explains a lot

what's the mileage like when you take into account the downhill return trip? Unless your commute is uphill both ways through the snow :)

Re: Tesla created secret team to suppress driving range complaints (2023)

#16

Tesla advertises 350+ miles on its cars. I’d bet money that the cars can’t do 300 in normal weather, normal driving conditions without the AC/heater on, on a straight road with no elevation gain. These are the things they blame when they say EPA estimates are different becase blah blah… (I own a Tesla)

I know some of the lithium-sodium batteries behave differently now but my Model Y yells at me whenever I charge above 80% or go below 20%, saying it's bad for the battery. Not exactly inspiring if it causes more wear unless you sacrifice 40% of the range.

Re: Tesla created secret team to suppress driving range complaints (2023)

#17
post #8

The article really focusses on range loss when cold, but as far as I can see that isn't really true. The reality is there is lots of range loss when using the cabin heater, which obviously one is most likely to do when cold. All modern Tesla's use heat pumps for cabin heating, which ~halves the range loss, but it's still substantial.

Does the heater really use all that much energy? A home space heater is something on the order of 1 kW, which is a fraction of a percent of what is needed to move the car.

>A home space heater is something on the order of 1 kW, which is a fraction of a percent of what is needed to move the car.

How are you getting "fraction of a percent of what is needed to move the car"?. Wikipedia says the model 3 (long range, RWD) has 82 kWh capacity and 363 mi range. If you drive at 40mph that's 9hrs of driving, meaning the car consumes 9kW at that speed. 1kW is not "fraction of a percent" of that.

Re: Tesla created secret team to suppress driving range complaints (2023)

#18

I have a model 3 (from 2023), that is rated 270 miles. I can get at max 120 miles, more like 90 miles from it. My drive to work involves going steeply uphill, not very cold. The only reason I don’t care is I have free office charging. If I didn’t I would be pissed by the range I observe. Also Tesla servicing is famously bad, and the way the employees treat service requests (as described in the article) explains a lot

Getting only 30% of the advertised range would be very unlikely unless you always drive uphill and in the cold. I've had a Model 3 and a Model Y, and would get at least 80-85% of the advertised range in average California weather.

Re: Tesla created secret team to suppress driving range complaints (2023)

#19
post #8

The article really focusses on range loss when cold, but as far as I can see that isn't really true. The reality is there is lots of range loss when using the cabin heater, which obviously one is most likely to do when cold. All modern Tesla's use heat pumps for cabin heating, which ~halves the range loss, but it's still substantial.

Does the heater really use all that much energy? A home space heater is something on the order of 1 kW, which is a fraction of a percent of what is needed to move the car.

The climate control in my (non-tesla fwiw) EV with a heat pump uses around 2kW when its going full-out. Anecdotally it also heats the cabin much faster than a space heater would.

Usually it's only pulling that much juice for the beginning of a drive and after a few minutes it reduces when it finds a steady-state.

2kW is about the same amount of juice that the drivetrain pulls when driving 35mph, so it can make a pretty big difference in the efficiency of shorter drives.

Sidenote: even though resistive heating is less efficient in heat per watt, using the heated seats is usually more efficient in terms of comfort per watt than heating the entire cabin

Re: Tesla created secret team to suppress driving range complaints (2023)

#20
post #8

The article really focusses on range loss when cold, but as far as I can see that isn't really true. The reality is there is lots of range loss when using the cabin heater, which obviously one is most likely to do when cold. All modern Tesla's use heat pumps for cabin heating, which ~halves the range loss, but it's still substantial.

Does the heater really use all that much energy? A home space heater is something on the order of 1 kW, which is a fraction of a percent of what is needed to move the car.

Consider that your typical older long range model 3 had a 75 kWh battery in their first day, and one might typically charge it to 80%. So that 1kW, for one hour, is far more than a fraction of a percent of the practical battery capacity.

Mine doesn't have a heat pump, so I can definitely notice range decreases. Also consider that the battery likes to be at a good temperature, and that isn't going to be free if your car is parked outside for 8 hours. That changes range too

Post reply on HN