Some things explained: ~
The reason it is more efficient to only fill the kettle with the amount of water you need is because if you are boiling more water than you need this is going to waste energy as you are using more electricity, which also means you are increasing your carbon output.
If a customer is on economy 7, the reason they should use appliances after their set time is because electricity is charged at a much cheaper rate than during the day, so by doing this it will save the customer money on their energy usage.
For health and safety reasons we would advise you to turn your appliances off at the socket, otherwise you just need to make sure appliances are not left on standby as this will also waste energy.
Trust this information has been useful.
Energy Efficiency Advisor
Residential Customer Services
Tel: 0800 022 220