The CCS connector equivalent is relying on the onboard DC-AC converter for V2L-V2G, hence no inverter needed.
The CCS cable uses a resistor between PE and PP pin to allow the EVSE to determine its current capacity, 1–2.7kΩ for single-phase 13A all the way down to 50–150Ω for three-phase 63A. [1]
What manufacturers have done is tap into that and use some resistance to tell the car to go to V2L mode.
- Hyundai IONIQ5 and Kia EV6 use 50-75Ω for its V2L adapter, offering 3.6kW load
- MG ZS uses 470Ω offering 2.2kW load
- Ford F-150 to offer 9.6kW load, but resistor is unknown
- BYD vehicles to offer 2.2kW load but resistor is unknown