There is so much confusion around EV "chargers". All Level 1 and Level 2 chargers are just extension cords with some trivial signaling. The car tells the extension cord when to close the circuit, and the extension cord tells the car the max amps it can draw. What exactly is a level 3 "charger"? I assume it is a big box that rectifies AC into DC. But the actual "charging" decisions still need to be made in the car right? All the electronics to measure the level of charge and request power to pump into the batteries has to happen in a box that knows that battery chemistry and how much it can handle. So then there must be a simple protocol for the car to ask for a certain voltage and current and the big box delivers it. So any complexity in the big box is just the ability to deliver DC at variable voltage?