ptomblin wrote:We bought a 2018 Leaf last night, picking it up tomorrow. The salesman said something I have trouble believing: he said that the 440V DC Quick Charge port is only for emergencies like if you completely run out of charge and have to be towed, because using it too often could damage the electronics. Is that for real?
Classic case of a little bit of knowledge being dangerous.
The DCQC CHAdeMO port is just a direct connection to the battery via a closely monitored DC bus versus feeding in AC and using the charger on board the car. In CHAdeMO's case, the charger is in the big metal box outside the car.
As a general rule, the more quickly you charge and discharge the battery the harder it is on the battery. This is true of discharging via heavy acceleration 80KW as well as quick charging at 50KW. The real factor is that when you do these high power energy transfers you are also creating heat. If it is hot outside and you're shoving 50KW into the battery it will get even hotter. That's the true enemy of the battery.
It is not just for emergencies. But if you don't need it, there's no reason to use it. It is for road tripping or topping off because you need a bunch of charge in 20 minutes and can't wait 3 hours. That's it.