It would certainly be better than nothing. One thing is that requires everyone to carry their own mobile EVSE with them. Not every car comes with a 120V EVSE in

It would certainly be better than nothing. One thing is that requires everyone to carry their own mobile EVSE with them. Not every car comes with a 120V EVSE included these days. Also especially in cold weather the charging efficiency can be very low. Energy is needed to run the car and BMS systems, and to condition the battery temperature. With a 240v charge a higher percentage of that input energy is actually making it into the battery. The wiring isn't necessarily more expensive either. 120V * 12A = ~1.4kW. Wiring here is 12awg or 14awg, 1 hot, 1 neutral, 1 ground. 240V * 12A = ~2.8kW. Same amps so same wire size. 2 hots, 1 ground. If you go with 12awg I think that's actually rated for 16A continuous which would give you ~3.8kW