Everybody has power outages and everybody has fridges and freezers with hundreds of dollars of food at risk.
That's why I have an emergency power generator ($350, Home Depot). Plugging into a car would be easier, but my generator has four 120v outlets and one 240. Even if a car has V2L or V2H, I suspect many will be one outlet. Unless we are talking about a work truck the Silverado EV.
You'd need Chevy Equinox EV 3RS eAWD trim level to get the optional 19.2 kW capability. That means more $
PLUS the cost of a dedicated 100A circuit and the cost of an 80A EVSE. Yikes. Many older homes only have a 100A service. Even newer, 200A service panels would be an issue as you are effectively reducing it to a 100A by taking 100A for the EVSE circuit. Neither of these scenarios are practical. So that means a new power line from the utility to the garage to supply say, a 100A panel. Plus permitting, inspection, etc. After all that, what, extension cords running from the garage to your house refrigerator?
I'm not an electrician, so perhaps I'm missing something. I know emergency nat gas-powered units like Generac simply kick on when the power goes off whether you are home or not. They feed to whole house. No extra power line from the electric company needed. They do use a device that prevents backfeeding the incoming utility power line (very dangerous). I suspect the cost all in would be less than buying a car trim level I don't want in order to buy an optional HD EVSE charging capability, etc., etc. in order to get V2H.
And what if you or your car is not home when the power goes out?
I really like the idea of using the car to power something. What others have done is to install an inverter capability on their Volts that functions in a similar way. See
Inverter Kits now Available!