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this post was submitted on 15 Sep 2023
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That's 4,350 amps @230vac. The service fuse for my entire home is 80 or 100amp (single phase domestic dwelling Australia). The main breaker is 63amp.
DC fast charging typically runs at 400 volts, with some cars doing 800. They also do it with highly specialized equipment and service lines you'd never see in a residential setting.
When charging at home, you have all night. A 50A circuit will go 0-100 on most cars in that time, and if you look at what most people actually drive you can generally get by on much less.
Fast charging uses up to 1000 V DC, and the current limits of conductors are typically set by the temperature it reaches when conduction losses heat them up. This can be (and is) offset by liquid cooling, allowing current installations to deliver up to 650 A (Tesla supercharger v3).
With improvements, it's not far off 1 MW.