Is a more powerful kettle, more energy efficient?

Please be aware that a kettle rated at 3000 Watts will boil more quickly than a similarly sized kettle that is rated at say half the power. This means that the less powerful kettle will take longer to boil, but should still use the same amount of power overall - or will it?

Because this kettle is taking longer to boil there will a greater amount of time for heat to be lost through the body of the kettle which will also cause a measurable delay in the ability of the kettle to reach boiling point.

This means that a more powerful kettle is probably cheaper to operate. However, it may not be cheaper to buy but that's a choice we have to make.

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