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After doing a bunch of research on this, it isn't so much Honda/Acura are limiting charging speeds as it is the battery pack total size directly correlates to the rate of charge they can accept. The Prologue and non-SS Blazer EV have 85kWh batteries at 288 total volts and the ZDX/Lyriq/Blazer EV SS all have the larger 102kWh battery at 345 total volts. Because of the way the Ultium platforms have multiple pack sizes that can and are linked together to make larger or smaller packs, the total pack volts varies based on the application and why the Hummer/Silverado/Sierra EVs can charge at 800v when they're still on 400v architecture. Because kW = amps * volts, the bigger packs have more nominal volts because they have more cells. Below is a Prologue example and change the 288v for the Prologue to 345v for the larger packs of the Lyriq, ZDX, or Blazer EV SS and you get 190kW for the maximum (or do the math for the other chargers, as well)