Increasing the available charge capacity to up to 450kW considerably reduces the charging time, in turn increasing the number of vehicles able to use the technology in a given space of time.
In 2016, there was a total number of approximately 14.5 million automobiles registered in California. If they all got home from work at the same time and plugged their electric mandated vehicles into the 450 kw charger at the same time Southern California Edison would have to supply 6,525,000,000,000 (6.5 trillion) watts to the grid. The USA government and the utilities have worked together to produce the standard (it is in revision 4.0 last I heard) that will prevent total meltdown of the nations power utilities when all those electric vehicles are plugged in for charging. The solution is called, "Smart Grid," and the arm of the government leading the charge is The National Institute of Standards and Technology ( a non-regulatory agency of the United States Department of Commerce.)

Reference: https://www.nist.gov/engineering-laboratory/smart-grid





