Allow Tesla Model S with its superior battery to export power to any other electric vehicle in need of power.
Moderator: No EV currently has this feature (as of 2021). It would likely require some expensive electronics to change the battery voltage and amperage to match other EVs’ requirements and protect both batteries. To make it practical, you would also need to carry a special cable and connector. In volume, we estimate the added vehicle cost would be between $2,000-3,000 per car for fast DC charging, perhaps at 50 kW.
For 10 kW slow charging via AC, it’s hard to imagine waiting many hours to help someone out while it drains your own car of power. The mid-2021 Ford F-150 is expected to include a 9.6 kW AC supply option that perhaps could be used for this purpose. The Cybertruck is also expected to have AC power available.
(voting combined from a close duplicate that has been removed)