Yes people have done it by connecting an inverter, but the amount of power available is very limited (less than 1500W), really only enough to run a fridge, some lights, and a couple other things with extreme care so as not to overload the converter/inverter. I would say the minimum you need for a whole house backup is 3000W. Some peoples' houses have a 1500W idle load which is more than it can handle. A portable gas generator would be a much better investment if you're concerned about powering your house during an outage. Order a F150 Lightning if you want to do the electric backup power thing properly, doing this to a Mach-E may void your warranty since it is not an approved use or something the charging system was ever designed for.