** The big inefficiency with electric kettles and jugs is having to boil mo re water than needed. Older designs used an exposed heating element that re quired several cups of water to cover completely while newer ones use a hot metal plate on the bottom of the vessel that can be safely used with as li ttle as one cup.
Another issue is with stainless steel vessels that allow the hot water to c ool rather quickly - compared to ceramic or plastic vessels - so after only a few minutes you need to re start it boiling.
My kettle is rated at 2.2kW and uses about 1 cent of power a day, on averag e.
Storm in a tea cup...
.... Phil