Why can't our Tesla cars be used as a large battery pack to power our home in case of a power outage

[Dan123]

Since Tesla cars have large battery pack, why can't we use it to power our house in case of an emergency? I have a Model S 90D and all I see is a 12V port. I wish there are some type of adapter that goes into the charging port to output its energy to provide electrical power for external devices.

Is this even be possible?

You can take an electrical generator, connect it to one of the rear wheels, then use jacks to lift the rear wheels, and then set the autopilot to drive at 5 miles per hour.