EVSEs are more fragile, more prone to vandalism, so more costly to keep running. 240V could use the same wires and double available power, but existing portabl

EVSEs are more fragile, more prone to vandalism, so more costly to keep running. 240V could use the same wires and double available power, but existing portable chargers never draw more than 16A from 120V, so people can't screw it up.