In North America a kettle maxes out at 1500W, because we have 120V power and a standard circuit has 15A breaker (and especially older breakers are only rated fo

In North America a kettle maxes out at 1500W, because we have 120V power and a standard circuit has 15A breaker (and especially older breakers are only rated for 80% continuous load). The oven peaks at 3kW, but once it reaches the set temperature it will use much less than this, so it will use less than 3kWh/h. A kettle runs for shorter, but generally it runs full out until your water boils and then you unplug it.