strider
Active Member
Not really adding to the discussion but just to be pedantic... Tesla did not require a wall mount when buying a Roadster, at least not in 2010 when I bought mine. It came w/ a UMC and 120V cable and you could buy the HPC if you wanted.To be fair to Tesla, here's some history. Every single EV, before the Model S, and I'm including the Tesla Roadster here, required you to buy a wall mount charging station for your home.
Tesla decided to do something radically different with the Model S. They decided to make a portable EVSE that was relatively high power (40A) and could be plugged into a variety of plugs with appropriate adapters.
This was ambitious for several reasons. First a 40A charge rate results in potentially twice as much heat resistance than charging at 30A, which is what most of the industry had been capping their mobile chargers at. Second, the plug adapter is yet another connection point that has to be made very reliable under heavy electrical loads.
Also, I would contend that manufacturers limiting their EVSE's to 30A is because neatly all EV's only have 6kW chargers so the car can't use anything higher anyway.
If heat is a problem then just limit the UMC to 30A and if someone wants more then they can buy an HPWC. That's still better than 13A. Seems like a simply solution to me?