Could it be a legal or certification issue that makes them limit the input?
I'm thinking that maybe a higher charge level would require a different and expensive certification worldwide, and since most people will use overnight charging, they have decided to settle with the lower level.
As stated in previous posts, much of the hardware seems to already be in place such as batteries (same as i3s), ability to charge faster (if you use engine as source) and even the cable (rated up to 22 Kwh). So what's stopping them from allowing a faster charge rate??
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