“An inverter on your car can do the same thing.”
Yep, we did that in the Texas Freeze last winter. Ran our truck for close to 48 hours while powering a 1 kilowatt inverter. Having a 150 Amp alternator (pretty standard these days on larger vehicles) was the key!
FWIW, be ready for this week.
Texas is due for another cold snap, per Joe Bastardi at WeatherBell.
He doesn’t expect it to be as bad as last year’s but wants people to be ready.