https://spectrum.ieee.org/ev-charging-2671242103

This is an article from IEEE Spectrum, but what I think may surprise many of us here is to discover that for Level 2 chargers, the actual charger is in the car. The top diagram is for a Level-2 charger (240V AC) such as we would have in our building. The bottom is for fast (DC) charger, which would not be something to install in a residential property.

‘A key safety feature of existing EV chargers is an isolation link [in teal]. Within this circuit, a high-frequency transformer provides physical separation between grid power and the electric vehicle’s battery. The isolation link is inside the vehicle’s onboard charger for Level-2 charging (top). For Level-3, or fast, charging, the link is located inside the charging station (bottom).CHRIS PHILPOT‘