Install Chademo on your car.
Wire a high voltage chademo plug into a 6kw Grid tie inverter that can take up to 500vdc In the same place you would wire in Solar. SMA would be my favorite. You'll have to some how fool the chademo port to open.
The 6kw grid tie inverter will pull the current its rated for, X 1.25, so between 6000-7500 watts coming from the EV.
Wire the 240ac output from the grid tie inverter into and Outback radian 8048. The grid tie inverter will not see the grid down because the outback inverter creates 240v 60 hz. The grid tie inverter hooked up to the electric car via the chademo port will take the power from the car through the GT inverter, through the Outback inverter and either power the loads in the house or spin the meter backwards if you have a net metering agreement from solar previously. (6000w inverters matches the OB 8048 wattage it can export to the grid and why I picked that wattage inverter)
You will need a 48vdc battery bank to turn on the outback inverter. Sealed agm would work fine. Min 200 amp hour bank. (More amp hours is better if planning to be tottally offgrid and planning on adding solar)
If the grid is active the outback radian can export to grid. But also if you want to be stealth and have the power company not know What you're doing. You can set the outback radian inverter to be in zero export mode. This mode is used in Hawaii where you get Can't export kWh to grid. Or set the outback inverter to go total offgrid mode by turning off the main grid breaker feeding your sub panel.
In offgrid or zero export mode,
When the 48v batteries are full and no loads are being used in the house.
The outback radian will turn off the grid tie inverter by frequency shifting or raising the voltage and tripping off the GT inverter. When the house loads turn on and power is needed the outback inverter will allow the GT inverter to turn back on which will take power from the EV once again.
If you want to add solar to this system. Do so by adding it to the Outback radian via charge controllers. Each Outback FM 80 charge controller can handle apx 4500w of PV. And adding two charge controllers to a XW8048 is maxing it out. Make sure you have a large enough 48v battery bank to handle the extra charging capacity.
You could also hook the outback radian to a generator in case it's night, Your ev is drained and can't connect with to the grid.
With your EV, Solar, and generator, you become your own power company.
Keep in mind these are all theory's and don't recommend trying it.