In these conditions, sometimes the temps fall even lower, and people will take their ICE batteries inside to prevent it dying. Can’t do that with an EV, and can’t leave it charged for two weeks. The EV I have in mind can run its own heater periodically to prevent damage. Could I count on it doing that for the entire vacation?
IIRC 10F should be fine to start in an ICE since they test 12V batteries down to 4°F. If you look on your battery and see “CCA”, that stands for cold cranking amperage.
I learned this in high school some moons ago, when Elon Musk was balding and running PayPal, so I’m not sure how an EV would do…
It also doesn’t require nearly as much amperage to run the electronics as it does to crank a cold engine.