I have two Tesla Powerwalls in my garage, and they (among other things) do just this.
I look at the size of those, and the size of a random Tesla, and I can easily see two of these shoved into the baseboard of a Tesla, much less the larger vehicles.
I know the Ford Lightning was advertised as a potential back up power source for the home.
The real trick is getting the power out of the battery and in to the home itself. It's one thing to run an extension cord to the refrigerator, quite another to get the battery plugged into your home circuitry. That requires more preparation, as well as an electrician.
Cheap way to power the home directly is to get a generator inlet put in ($500-1000) and connect the vehicle to that. You can then use either a vehicle or a gas generator, which is useful during extended outages when you need to top up the car.
Expensive way is to get some manufacturer specific automatic transfer switch (I got Tesla's put in). The hardware is $2500 and the labor is $4K+.
I did both and used both during a recent week long outage.
I look at the size of those, and the size of a random Tesla, and I can easily see two of these shoved into the baseboard of a Tesla, much less the larger vehicles.
I know the Ford Lightning was advertised as a potential back up power source for the home.
The real trick is getting the power out of the battery and in to the home itself. It's one thing to run an extension cord to the refrigerator, quite another to get the battery plugged into your home circuitry. That requires more preparation, as well as an electrician.