It will depend on the electricity tariff you have, for a residential consumer with our Fixed Price Tariff, you can take advantage of cheaper consumption hours at nights and weekends.   We should know that there are three fundamental periods for the price according to the hours of the day, the most economical being the "off-peak hours": Peak hours: In the morning between 10 a.m. and 2 p.m. and between 6 p.m. and 10 p.m. Flat hours: From 8 a.m. to 10 a.m., from 2 p.m. to 6 p.m., and from 10 p.m. to midnight. Valley hours: Between 12 p.m. and 8 a.m., weekends and holidays.   On the other hand, for a consumer with power over 15kW, the cheapest hours depend not only on the time of day, but also on the month of the year.