 In contrast to Economy 7, which only provides off-peak electricity during nighttime hours, Economy 10 tariffs provide ten hours of off-peak heating split between night, afternoon and evening.The advantage of this scheme is that by matching the storage periods better to the times when heat is required, less heat needs to be stored during the day, when there may be no demand for heating.The afternoon and evening periods also provide a top-up to heating systems at off-peak prices.