here's a product that should exist, that doesn't: a device that connects to solar panels (using standard mc4 connectors) and does mppt to optimize solar input, then connects directly to an EV (with tesla NACS or J1772).
it would need to convert the solar to AC, then dynamically tell the car to adjust its current draw. it would probably require at least a small internal battery to buffer some energy
basically a mppt solar inverter that realtime communicates the maximum output current to the EV
