Pre-heating and Pre-cooling????

[bsaik]

Thanks! ? not much difference.

Agree, and I’ll add one additional thing. Leaving your car running to run the AC uses a fair amount of energy (gas) because of all the energy wasted by the ICE. With an EV, in my experience running the AC for an hour or so doesn’t really run the battery down that much because you are only running the motors in the AC unit and air circ fan.

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[CommodoreAmiga]

Agree, and I’ll add one additional thing. Leaving your car running to run the AC uses a fair amount of energy (gas) because of all the energy wasted by the ICE. With an EV, in my experience running the AC for an hour or so doesn’t really run the battery down that much because you are only running the motors in the AC unit and air circ fan.

Yet people say running the A/C makes a significant impact on range?

 

[davrow_R1T]

Yet people say running the A/C makes a significant impact on range?

People SUPPOSE that, then get shot down by people with experience.

 

[bsaik]

Yet people say running the A/C makes a significant impact on range?

Yea I’ve heard that but never really noticed it. It would be interesting to see actual data, but of course I’m too lazy to run the experiment. From what I’ve seen, the first order factors that affect range are wind resistance (changing it by hanging stuff off your car or towing things),, followed by speed (which increases the drag due to wind resistance) and going Up hill and lastly carrying more weight, especially uphill.

 

[ajdelange]

I've observed battery decline of about 1%/hr (~1 kWh/hr) with A/C running while parked in the sun. When driving the consumption on the same stretch of road is about the same A/C on or off but there are so many other variables that we can only conclude that the A/C load is "in the noise". Assuming one is cruising at 65 mph 1 kWh/h is 1000/65 = 15 Wh/mi. This is all in east coast hot (90 + °F) humid weather. Demands may well be higher in the over 100 °F the west coast is going through now. Also remember that the battery has to be cooled irrespective of whether the cabin A/C is on or not.

Here's reported data from my X on consumption vs temperature. The heavy line is a qudratic fit to TeslaFi's recorded numbers weighted by the number of miles driven in each temperature range. Note that the 30-35 ° point was excluded from the fit because it represents a single drive on wet/snowy road and that definitely increases consumption. Also note that the 90-95 ° point doesn't have much influence because it too represents relatively few miles as it has, thankfully, only been nasty hot here for a couple of days (which is why we come up here in the summer). This plot nicely illustrates what I mean when I imply that temperature effects are often obscured by other things that effect consumption.

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