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The only bit I'll disagree with in the quote you referenced is that it's counter intuitive.This dovetails with what I was taught many years ago, but in relation to wet cell lead acid batteries. But according to these guys, it seems to apply to the current crop of lithium batteries.
To those familiar with either batteries or power grids, it's the expected outcome - slow charge is always the preferred option and the last thing we need is the equivalent of "download a movie in 30 seconds" type thinking or marketing of chargers in a manner comparable to 1980's audio equipment with big numbers prominently stuck on it.
For the vast majority of users there's no reason why an EV battery ought to charge quickly. Park the car, plug it in an leave it.
I guess that sounds a bit technically elitist but I couldn't think of any other way to put it really. It's not my intent to come across that way but it's the expected situation technically, it's no surprise at all. Fast charging isn't kind to batteries and drawing all the energy over a short period is also problematic on the upstream supply side. Everyone benefits from a slow charge while the car is parked.
Fast chargers have a place for public charging facilities but not in the average household driveway.
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