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Updating California’s grid for EVs may cost up to $20 billion
(arstechnica.com)
This is a most excellent place for technology news and articles.
To be fair they are on a third world 110v electrical system which means they need twice the cable size to carry the same current as the UK
The US has a split phase electrical system, meaning that for high current applications (like charging cars!!) 220v is readily available. The current regular outlets are rated for really has no bearing on this discussion. (No excuses for Americans!)