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?
Left a Tesla sitting outside in Breckenridge for 3 days. The battery initially appeared to lose about 5% but recovered some when the pack warms up. Net loss was about 1% per day. Two weeks will be fine, at least with a Tesla.
And Teslas are notorious for high vampire drain so it will be even less of an issue on most other cars.