Earlier quoted context omitted.
In electric kettles or a microwave or even in a moka pot or another small container on a decent induction stove it's just 2-3 minutes. There was a video I can't find where they increased the voltage or something for a kettle and at one point it boiled the water in like 10-15 seconds.
Technology Connections? https://youtu.be/INZybkX8tLI
I guess many people have tried doing something like this. But I'll watch TC's video, too - he hasn't disappointed me so far.
Edit: Watched it. Not the same video, but this one had a lot more info and troubleshooting than what the one I had in mind.