This new 0.9 kW extra kettle boils 1 litre in 6 minutes and 30 seconds ( by comparison to 3 minutes in the ordinary 2kW kettle ) so the kWh used is the same. Where I gain is that in daytime, my solar on the roof quite often makes enough electricity to boil the downsized kettle below half price and if sunny then completely bill free.
Small washing up at lunch time using a small kettle can cost nothing - I keep my gas combi boiler switched off all day long now that I have the alternative for small hot water.
Sometimes if I need 2 litres not 1, or if it is night time, its back to the ordinary kettle, so don't throw yours out.
Last edited by DebF_EONNext; 27-03-23 at 18:19.