When is electricity cheapest on Monday?

According to the Spanish Ministry for Ecological Transition (Ministerio para la Transición Ecológica), a megawatt hour costs just 86.97 euros on Monday between 13:00 and 14:00. That equals 0.08697 euros per kilowatt hour.

In the dearest hour, 20:00 to 21:00, the price climbs to 394.88 euros per megawatt hour. That is more than four times the midday figure.

The daily average is 223.83 euros per megawatt hour, says grid operator Red Eléctrica de España (REE). That is 0.97% more than the day before.

The report also lists a cheapest three-hour block from 19:00 to 22:00. It does not fit the dearest hour of 20:00 to 21:00, so we leave it aside.

What should households on the regulated tariff do now?

Only households on the PVPC, the regulated tariff for small consumers with around 11 million customers according to REE, are affected. Those on a fixed-price contract gain nothing from cheap hours.

Energy supplier Repsol advises running the washing machine, dishwasher and tumble dryer on a delayed start at 00:00. The oven, iron and air conditioning should rest in the dear hours.

Anyone who cannot wait until midnight should, says Repsol, choose the middle band (llano) over the peak band (punta). An electric car is best charged at night.

The report gives no saving in euros. One source offers a rule of thumb that at least 30% of consumption should fall in the valley.

Which tariff times apply on Monday in the Canary Islands?

For the 2.0TD tariff, the same time windows apply on weekdays in the Canary Islands, the Balearics and the mainland, say Repsol and Endesa. The valley (valle), the cheapest band, runs from 00:00 to 08:00.

Peak times on Mondays run from 10:00 to 14:00 and from 18:00 to 22:00. The middle band covers 08:00 to 10:00, 14:00 to 18:00 and 22:00 to 24:00.

The cheapest market hour, 13:00 to 14:00, therefore falls in a peak window of the tariff. At the same time, REE says the energy part of the PVPC has been tied to the day-ahead market (the exchange price for the following day) since 1 January 2024.

According to Endesa, Saturdays, Sundays and national holidays are valley all day. Sources do not agree on peak times, and one lists 11:00 to 14:00 and 19:00 to 22:00.

Why do other price series differ from the report?

A second, unofficial price series shows different hours for 9 November: cheapest 14:00 to 15:00, dearest 21:00 to 22:00. In the PVPC the extremes there are 0.0870 and 0.3949 euros per kilowatt hour.

These PVPC values roughly match the report's figures, only labelled one hour later. Whether a different hour count or a mix-up of series lies behind this is not confirmed.

For the daily average, the other series gives 0.2217 euros per kilowatt hour for the PVPC, about 13.6% more than on 8 November. The report, by contrast, speaks of a rise of 0.97%.

REE publishes next-day hourly prices every day at 20:15 in its ESIOS system. Anyone planning by them should check the values there; those for 10 November appear on 9 November at about 20:15.

How expensive is electricity overall in autumn 2026?

The PVPC averaged 0.1992 euros per kilowatt hour in October 2026, according to an analysis based on CNMC and OMIE data. That is 36.0% more than in October 2025 and the highest figure since February 2023.

Wholesale electricity cost 166.6 euros per megawatt hour on average in October, around 120% more than a year earlier (75.8), by the same analysis. A typical bill with 4.6 kW and 270 kilowatt hours comes to 88.1 euros a month in the model instead of 70.0 euros.

In the Canary Islands many goods carry the island tax IGIC instead of VAT.

Will the tax on electricity fall in December?

INE, the Spanish statistics office, publishes the electricity consumer price index for October on 13 November 2026. The planned tax cut in December depends on it.

According to an analysis, Real Decreto-ley 25/2026 would cut VAT on electricity from 21 to 10% and the electricity tax from 5.11 to 0.5%, for contracts up to 10 kW and Bono Social recipients. The condition is a year-on-year index rise of more than 15%; the research did not check the text in the BOE (Spain's official state gazette).

The September figure was plus 11.4%, so the cut does not apply in November. The estimate for October is about plus 10.6%, which is below the threshold.