Tesla & BYD with V2H & V2G - Bidirectional DC charging confirmed

Not necessarily, V2L ratings are very limited (10 to 15A max).

Most people don’t realise many affordable bidirectional Hybrid inverters (of the high-voltage or HV variety) work almost exactly the same way as a bidirectional EV charger, except they charge a stationary battery system instead of an EV battery.
Hybrid inverters seamlessly transition between charging and discharging with milliseconds, as well as solar energy conversion. We have been installing them for years, and they are becoming more affordable all the time; a 6kW bidirectional Hybrid inverter, such as the Sungrow SH6.0RS, costs as little as $2800.