Charge another EV from Your Car – V2V



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)

lightly edited by moderator
Category: CY3XS Applies to:
     Created 24-Aug-2014


how about via 120v inverter (220v in Europe)?  Allow the other EV to plug in and trickle charge enough they can get to a charger.
    Created 4-May-2019
I'm very curious how this would work.

If I understand it correctly it would just charge car no:2 from the first car until the batteries are at equal charge? This would possibly be a very slow alternative if car nr 1 is not "full".

But I'm no pro-electrician.
    Created 10-Mar-2015
Great Idea!

It would give me a better sense of security - just in case. A software addition could be that if there is a Tesla out there with low batteries it might send out a signal to other Tesla's that are present in the neighborhood to notify the needed help. If then accepted by the other Tesla, it then can be further communicated by 'mutual acceptance' of both parties to exchange Phone numbers.

Think about it - it's a digital world out there.
    Created 5-Mar-2015
If the car were widely used as an emergency  power source for your house, this would be an additional benefit. That is a big "if".

Certainly a utility power inverter output (120/240 VAC) would be useful  to lots of folks.
    Created 4-Mar-2015
Nice idea but I'm not sure how that would be done and it would require a special cable that wouldn't be free.
    Created 6-Jan-2015
All it really needs is a 120/240V inverter to let the other car (or other device) get reasonable amounts of power in a standard form.  There's no need for a DC quick-charge capability, and the cable would be the responsibility of the other device.
    Created 2-Oct-2014