I've been traveling and my previous post was a bit abbreviated. The Nissan rep I was speaking with wasn't a temp. He was involved in bringing the dealers in my state up to speed to become "Leaf Certified". [This turned out to be a very big deal for me because I learned from him that the Nissan dealer in Durango is going to be Leaf certified and Durango should be Leaf distance from where I live, despite three mountain passes. He said it is also possible that the dealer in Grand Junction will decide to become Leaf certified, in part because Nissan is coming out with a plug-in hybrid version of the Altima (IIRC) and an Infiniti car, so charge stations and electric service will be needed for them. For me, this means that I won't have to tow my Leaf to Denver for service, as I had been expecting.]
However, I was so astonished at his assertions regarding EVSE Upgrade being considered as a possible cause for battery problems in the Texas cars that I didn't call him on the BS. I did express my skepticism that the EVSE used had anything to do with the charger or battery problems. He claimed that the cord for the Panasonic EVSE wasn't designed for the current in the upgraded version and that it gets very hot. In retrospect I wish I had pointed out that if he knew anything about electricity he would realize that how it reaches the charger is irrelevant, so long as the handshake is performed ok and the charger functions. But I was taken by surprise and don't handle such things well; a resilient debater I am not.
What Phil says above about Europe using 240V, and the likelihood that a similar Panasonic unit would be supplied with the cars, did occur to me shortly afterward. I thought about going back to point out how ridiculous his assertions were, but decided not to. My impression was that he had been given orders from on-high to discourage use of the Upgraded EVSEs, for whatever reason (I can think of several).
FWIW.