The indexed electricity rate is the one that offers the same price of the electricity supply as purchased by the marketer in the Market, plus a small fee of € 3.9 / month to cover our management expenses. That means that the price of electricity will vary every hour and the customer will have 24 different prices per day.
The price of energy is stipulated by Red Eléctrica Española and the price of power is always the same and is indicated in the Official State Gazette (BOE).