US circuits are about 15 amps; UK ones similar - but twice the volts.

So a US kettle is about 1500 watts, a UK one 3000.

You can get commercial water boilers in the US if you need.

or just use an insta-hot tap which is infinitely faster than an electric kettle. or a plain old kettle on an induction cooktop which will also be faster than a single purpose electric kettle.

Actually yes, around double the wattage. It's one of the things English people notice when they move to the US (true!).

3000 glorious watts