So many issues have to line up for this to work.
1. MPPT operating voltage (or DC-DC output) must be compatible with the battery voltage of ~320-386VDC
2. CHAdeMO protocol must be observed in order for the car to pass battery voltage to the socket.
3. CHAdeMO protocol should be observed to ensure the battery is not over-charged.
2012 Shoreline Blue #1462 w/JdeMO | 2018 Tesla Model 3 LR | 4.32kW Motech/Enphase PV Solar + 2x Powerwall 2 AC| Leviton EVB40 40A & Jesla Home Charging | 2015 e-Golf LE (returned)