I had a Bosch electric kettle which went bang one day. So I now use a stove top whistling kettle on an electric hob.
Question is, am I wasting money? It takes longer to heat than an electric one but then I would be spending quite a bit of money on a new electric one. I always like the more expensive models;-)
I boil a kettle if I need a saucepan of water for cooking but for a single cup of coffee I have a Breville Hot Cup. The Breville comes in various sizes and prices. I have this one which was about £65 but they start at about £40 I think.
Over the years we have bought cheap and expensive electric kettles. We now buy cheap, but one with a good spout, a nice stable and wide electric stand and a comfortable handle. In terms of value for money, the cheap and expensive kettles have all worked as well as each other. Hubby always boils water up in kettle to transfer to saucepan and wonders why I don't do the same. It's a lot cheaper. I admit I'm a creature of habit and forget.
Am I wasting money? You are if you buy expensive electric kettles! One of the Which? Best Buys is Asda's George Fast Boil at less than £20. If you're happy to spend a whole lot more, then you shouldn't be concerned about the cheapest way of heating the water!
A saucepan of water boils faster on my induction hob than the same amount of water in my 3kw kettle. As I don't know the kW of my hob I don't know which is the cheapest method
You are wasting money by using a kettle on a hob, gas or electric. Most of the heat goes up and past the kettle. Not much of the heat is directed at the kettle. An electric kettle - a plug-in one - uses its heat efficiently because all the heat is contained within the kettle, and it does what it is designed to do; heats the water and not the air surrounding the kettle.
For best efficiency hobs need to be used with appropriately designed cookware. A gas hob will work best if the kettle has a "skirt" so heat is trapped underneath. Such would not work well an an electric hob which needs maximum contact between hub & kettle (& appropriate materials in the case of induction).
Thank you everyone for your advice. I started looking at new electric kettles and saw one I liked with a matching 2-slice toaster so guess what I've gone and done??? Yep, new electric kettle and toaster on their way. The toaster is replacing a 4-slice one so will take up less room which is good.