4 ms·

Driving 130 km/h can knock ~30% off your range compared to driving 90 km/h according to various sources[1]. Add cold on top of that and losing 50% over advertis

by dagw 5y ago

Driving 130 km/h can knock ~30% off your range compared to driving 90 km/h according to various sources[1]. Add cold on top of that and losing 50% over advertised range seems reasonable. If you want to optimize for range you should apparently aim for holding a constant 50-55 km/h. [1] https://teslike.com/ https://teslike.com/ https://cleantechnica.com/2018/07/15/tesla-range-plotted-relative-to-speed-temperature-graphs/ https://cleantechnica.com/2018/07/15/tesla-range-plotted-rel...

smarx007 5y ago
> If you want to optimize for range you should apparently aim for holding a constant 50-55 km/h. I think rather 80-90 km/h, at least for Nissan Leaf, as well as from the table you linked (55 mph ~~ 89 km/h)
- dagw 5y ago
  from the table you linked (55 mph ~~ 89 km/h) The table doesn't show any data below 55 mph. This site: https://cleantechnica.com/2018/07/15/tesla-range-plotted-relative-to-speed-temperature-graphs/ https://cleantechnica.com/2018/07/15/tesla-range-plotted-rel... has a graph that plots range vs speed all the way to 0 (for the Model S) and it shows the 'optimal' speed to be around 35 mph.
  - smarx007 5y ago
    My bad, didn't check the second link, thank you. The data looks too smooth. Is there raw data somewhere? Or analysis without too much regression applied?
- gehen88 5y ago
  I own a Nissan Leaf and can confirm 90km/h is about the sweet spot for trip duration. Above it, you're draining battery faster than you can recharge it. Below it is unsafe on motorways. I usually set it at 104km/h, which makes the estimated range pretty much exactly match reality. However, for newer EVs the sweet spot will be at higher speeds, because those cars are able to recharge at much higher speed (at least 2 times faster).
bryanlarsen 5y ago
50% loss in the cold is pretty darn high. You can mostly eliminate the cold range loss by: - preconditioning the battery & cabin while the car is parked and plugged in - using one of the newer models with a heat pump - turn the cabin heat down and the seat heating up The first point is the most important. We often have little range loss on our way to the destination but significant on the trip home because we couldn't plug in at our destination and the car got cold.
- cmrdporcupine 5y ago
  It is indeed unrealistically high, and I say this as a Canadian driving my Volt in a Canadian winter. I only see about 30% reduction even in -20C. That said, the Volt will warm the system with the ICE if it gets below -10C. But I've heard similar numbers from pure-BEV owners.
rad_gruchalski 5y ago
And draft behind a truck! I know a guy who’s skoda has something silly like 3.6l average consumption over 250km.

by dagw 5y ago

smarx007 5y ago

> If you want to optimize for range you should apparently aim for holding a constant 50-55 km/h. I think rather 80-90 km/h, at least for Nissan Leaf, as well as from the table you linked (55 mph ~~ 89 km/h)

dagw 5y ago
from the table you linked (55 mph ~~ 89 km/h) The table doesn't show any data below 55 mph. This site: https://cleantechnica.com/2018/07/15/tesla-range-plotted-relative-to-speed-temperature-graphs/ https://cleantechnica.com/2018/07/15/tesla-range-plotted-rel... has a graph that plots range vs speed all the way to 0 (for the Model S) and it shows the 'optimal' speed to be around 35 mph.
- smarx007 5y ago
  My bad, didn't check the second link, thank you. The data looks too smooth. Is there raw data somewhere? Or analysis without too much regression applied?
gehen88 5y ago
I own a Nissan Leaf and can confirm 90km/h is about the sweet spot for trip duration. Above it, you're draining battery faster than you can recharge it. Below it is unsafe on motorways. I usually set it at 104km/h, which makes the estimated range pretty much exactly match reality. However, for newer EVs the sweet spot will be at higher speeds, because those cars are able to recharge at much higher speed (at least 2 times faster).

bryanlarsen 5y ago

50% loss in the cold is pretty darn high. You can mostly eliminate the cold range loss by: - preconditioning the battery & cabin while the car is parked and plugged in - using one of the newer models with a heat pump - turn the cabin heat down and the seat heating up The first point is the most important. We often have little range loss on our way to the destination but significant on the trip home because we couldn't plug in at our destination and the car got cold.

cmrdporcupine 5y ago
It is indeed unrealistically high, and I say this as a Canadian driving my Volt in a Canadian winter. I only see about 30% reduction even in -20C. That said, the Volt will warm the system with the ICE if it gets below -10C. But I've heard similar numbers from pure-BEV owners.

rad_gruchalski 5y ago

And draft behind a truck! I know a guy who’s skoda has something silly like 3.6l average consumption over 250km.