I know this has been posted many times. The EVSE provides GFCI protection. It makes sure the contacts are not hot if you happen to drop the plug into a puddle at your feet or if it's raining when you go to plug in. It signals to the car what the max amperage it can draw is. The J1772 plug signals to the on-board charger that the trigger button has been depressed so that when you unplug there is no current being drawn and no arcing.smkettner wrote:What exactly is the safety issue of having the brick mounted in the vehicle? ...
If you put the "brick" in the car, hardwired to the OBC, all of those functions are meaningless since they only work on the connection between the brick and the car. You might as well not have it all.
Some of these things could be handled "manually" (plug in the car end, then the wall end, then push a button to start the charge; push a button to stop the charge then unplug at the wall, then at the car; and don't forget to manually set the car's amperage draw to match the source or you'll blow a breaker that you probably can't reset; hope that all the outlets you use are up to modern code and have GFCI and that it's working properly), but it's better if it's all automatic when being used by random members of the public.
Besides, all of the complaints about the EVSE, size, weight, price, are correctable over the long haul. I fully expect to see smaller, sleeker and cheaper EVSEs over time, unless EVs die out again, in which case, this won't matter a hoot.