Ah, but there is an efficiency loss from the induction setup, as it loses some power due to having to convert the 240v/50hz into multi-khz induction frequencies, that then has to traverse the gap to the kettle, the kettle will radiate some heat downwards due to having a ferric metal bottom, etc.Simon wrote: Mon Feb 02, 2026 10:03 pmNo, the amount of power used to raise 1ml of water by 1 degree is a constant. If you can do it quicker then your electric bill won't go up, because you're using more power for less time.Beany wrote: Mon Feb 02, 2026 7:23 pm It's not really, truly nerdy till you've looked at your leccy bill and seen how much it costs you to boil a usable amount though.
Time is money, and money is time!
The regular kettle just pumps 240v/50hz straight into its element with no conversion losses.
You're not thinking needlessly pedantic enough.
(to answer my own question, I asked inAccurate Intelligence, and it thinks that induction 'wall to cookware' is reckoned to be about 85-90% efficient, a boggo leccy kettle is about 90-95% efficient, so an induction hob is going to use slightly more power to do the same Work (tm), probably costing a whopping £20 over your entire lifetime if you're having a few cuppas a day - but that's the horrible, tragic tradeoff you have to make for having a mug of water boiling in under 30 seconds. And that's actually quite interesting)
