On my 2023 EUV I'm averaging right about 3 kWh/m. Sometimes less, sometimes more, depending on how much I need the heater and my speeds. It's been around freezing. My car has a 66 kWh battery pack and if I multiply that by 3 i should have a range of 198 miles. The GOM is typically estimating about 205. So it's been fairly close. When I picked up my car it had 5 miles on it and the estimate was about 244 but it fairly quickly settled down to reality based on my actual average usage. On warmer days, if I don't need the heater, I've been closer to 4 kWh/m.
I couldn't help but notice... 3 kWh per mile means you'd only get about 22 miles before a full battery runs out. I think you meant 3 mi/kWh.
Anyways, extreme cold will dramatically lower the efficiency of the car even while the battery's capacity remains more or less the same. Take, for example:
I mentioned this on another thread, but here's part 1 of the video about it. In a nutshell, I attempted to drive 624km or 388 miles on a single charge while driving mostly on expressways (highways). The video concerns the first half of the leg, where I spent 49.8% of the battery to go 311.9km...
www.chevybolt.org
388 miles on a single charge @ 82 to 95F, battery capacity calculated to be 61.3kWh
I've been getting a lot of snow with temperatures easily dipping below freezing for about a week. But just before that happened I was up for testing my 2018 Bolt EV's newly replaced battery at its 5-month mark, with 11,500 km (7,150 miles) already under the belt. There were two main objectives...
www.chevybolt.org
306 miles on a single charge @ 39 to 46F, battery capacity calculated to be 62.5kWh
In a nutshell, 40F drop in temperature caused 20% range decrease, but the battery capacity didn't drop. The miles achieved are the results of hypermiling, so don't look at the numbers themselves as typical of regular driving, but the difference that the temperature drop caused.
