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Home & garden.

15 October 2021

Best energy-saving kettles

Our round-up of the best energy-saving kettles - buy one of our recommended models to get a speedy brew and save money on your electricity bills.
Rebecca Jakeman
Energy efficient kettles 439735

Kettles all use a similar amount of energy to boil a litre of water, but that doesn’t mean they’re all equally efficient. 

If a kettle switches off immediately after boiling and has a low minimum fill level, it can help you save energy and money, as this means you don’t have to boil more water than you need.

In order to be eco-friendly, a kettle must have a brief overboil time and low minimum fill level. That way, we know that they do more to keep electricity usage down.

Which? members can log in to see our pick of the best energy-saving kettles in the table below. If you're not a member, join Which? to unlock the table below.

Best energy and money-saving kettles

Kettle make and model
Best Buy?
Minimum fill


1.5 litres
250ml (1 cup)
Verdict: It may be on the expensive side, but this kettle is a great all-rounder. It boils quickly, is very easy to use and filters limescale effectively if you live in a hard water area.
1.5 litres
300ml (1 mug)
Verdict: Ideal if you only tend to make one cuppa at a time, this kettle can boil 300ml in less than a minute. It has multiple temperature settings for different kinds of tea and beeps when it's boiled.
1.7 litres
285ml (1 cup)
Verdict: This quick and quiet kettle looks stylish and is easy to use. It turns off quickly after boiling and you can do just one cup at a time, making it much more energy efficient than the majority of kettles we test.
1.6 litres
250ml (1 cup)
Verdict: This modern-looking metallic kettle will have your morning coffee ready in less than one minute. It doesn't boil for any longer than necessary and it's a great choice if you've previously struggled with limescale build-up.
1.8 litres
250 ml (1 cup)
Verdict: It's a cheap and cheerful kettle that doesn't compromise on performance. You can make a speedy drink for one or cater for a larger group hassle-free, plus it's very easy to use.

Kettle energy-saving tips

  • Boil only the amount of water you need - boiling a litre of water often uses more than twice the energy it takes to boil the minimum amount.
  • Descale your kettle regularly - if it’s full of limescale, it uses more energy to boil the same amount of water.
  • Choose a kettle with a low minimum fill - this means you won’t waste energy by boiling more water than you need.

If you just want the best cheap kettle, or are looking for a kettle with special features such as a filter or multiple temperature options, head to our kettle reviews to see all the kettles we've tested.