If you have a smart meter, you can choose a smart time-of-use tariff, which offers a different price for energy at different times of the day.
These tariffs have been designed to help you save money on your bills, as you will be financially rewarded for using energy when demand is low or excess energy is available. For example, if you use your washing machine when there is a lot of renewable energy being produced (on windy or sunny days), your energy could be cheaper. Or, charge your phone at night when less energy is being used by others.
Time-of-use tariffs already exist and are popular with electric vehicle owners who can save money by charging their cars at off-peak times.