Now that it's spring--finally--it would be great to drive with the roof and windows open, but I'm wondering if better range is achieved by closing up and using AC. Anyone know?<br><br><br>
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There's a Motor Trend video on youtube where they drove LA - Vegas before the superchargers opened and they mentioned that Tesla had told them that windows up, AC on, is more efficient than windows down, AC off. .
Now that it's spring--finally--it would be great to drive with the roof and windows open, but I'm wondering if better range is achieved by closing up and using AC. Anyone know?<br><br><br>
With the Model S, I think it depends on how fast you are going and what the temperature differential is. At highway speed the increased drag is significant. Below 50 mph, windows down might be fine. When I am trying to be very efficient, I leave the windows up and only air-condition to the minimum. But then again, I do not live nor have I travelled to the south!
Your Questions Answered | Tesla Motors has an interactive gizmo where you can input your speed, the temperature outside, whether you have AC on, whether you have the windows open and whether it's day or night. I'm sure it's approximated but it should give you a good idea of the relative impacts.
Interesting: even at 70 mph, windows down generally seems to be better than A/C. I wouldn't have guessed that.
With A/C off, it's also interesting how much more range you get at higher temperatures (presumably due to decreased air density).
Set the AC to off, drop the temperature as low as it will go and turn the fan up to 11. Works great for mild weather. No power draw from AC and no hit from decreased aero.
I've heard a couple of times that AC is not counted in the Dash Wh/mi display. Is that possibly what happening?I can tell you any sort of prolonged travel at 70mph the AC is way better than windows + roof. Even at 95F outside.
I regularly do both and I get 350+ Wh/mi doing windows down, and ~325Wh/mi AC blasting at 70mph.
I've heard a couple of times that AC is not counted in the Dash Wh/mi display. Is that possibly what happening?