24h Online Fixed Tariff

The price may be updated on 1 January each year based on the actual CPI (latest officially published year-on-year Consumer Price Index at the time of the update), as well as any changes to current regulated components applicable to electricity and gas supplies, and any potential new changes that may be approved by regulation.

In case of an update based on the CPI, the year-on-year CPI for November will be used. It is published on the National Statistics Institute website. The update will be made by adding the result of multiplying the CPI by the previous prices to the existing prices. For more information, the year-on-year CPI for November 2025 was 3.0%, the year-on-year CPI was 2.4% for November 2024, 3.2% for November 2023, 6.8% for November 2022, 5.5% for November 2021, -0.8% for November 2020, and 0.4% for November 2019.

If any changes, either upward and downward, are made to the regulated components applicable to the contract, these will be passed on to the customer. These types of changes are regulated and are entirely beyond Endesa's control. They apply equally across the Spanish national territory and to every provider. Additionally, the price may be reviewed after one year from the contract date. If any changes occur, you will be notified at least one month in advance. You may then choose to terminate the contract without penalty, switch to another Endesa tariff, or sign up with a different energy provider.

The 24h Online Fixed Tariff is available exclusively to new customers. Existing Endesa customers cannot sign up for it.

The 24h Online Fixed Tariff contract lasts for one year and is automatically renewable.

Yes, it is especially useful if your consumption varies from month to month or throughout the day. The key to this tariff is that the price per kWh is fixed 24 hours a day, regardless of:

• How much you consume.
• When you consume it.

This provides predictability in your bill, even if you have months of higher usage due to heating/cooling, guests, or working from home.

Expert opinion: If you want to avoid surprises and simplify tracking your consumption, the 24h Online Fixed Tariff is a stable and straightforward tariff.

Yes. Unlike other tariffs, the 24h Online Fixed Tariff allows you to contract up to 15 kW of power, which makes it ideal for:

• Large homes with powerful appliances.
• Houses with electric heating or cooling systems.
• Large families.

You just need to verify that your supply point is low voltage and that your power level is within the accepted range (from 3.3 kW to 15 kW).

The main advantage is its simplicity. You don't have to adapt your life to time bands (peak, shoulder, off-peak).

Expert recommendation: Choose the 24h Online Fixed Tariff if you cannot concentrate your consumption in off-peak hours or if you value the freedom of not being a slave to the clock.

The tariff keeps the same main advantages: a stable price 24 hours a day and no commitment. The change mainly affects the name, which is now Luz Fija 24h Online, but it continues to offer the same simplicity and predictability that characterized One Luz.

No. If you were already a customer, you keep the same conditions without needing to do anything. Only the commercial name of the tariff has changed.

No. The tariff keeps its key features:

• Stable price 24 hours a day
• No commitment
• 100% online management

These features match those of the current Luz Fija 24h Online tariff.

The change to Luz Fija 24h Online reflects an update in Endesa’s tariff catalogue. The new name highlights its main benefit: a fixed price throughout the day, with no schedules or complications. The conditions remain just as simple and competitive.

You can:

• End your current contract (without penalty).
• Sign up for the 24h Online Fixed Tariff at your new property as if you were a new customer.

Just make sure that:

• The new supply point is in mainland Spain or the Balearic Islands.
• The contracted power is ≤ 15 kW.
• You sign up online, as this tariff requires.

Tip: Process the contract cancellation and the new sign-up at least 5 working days in advance to avoid any overlap.

Your monthly bill will show:

• Total consumption in kWh.
• Fixed unit price per kWh.
• Total to pay = consumption x fixed price (no surprises).
• Contracted power + taxes + regulated costs.

Everything is presented clearly and in detail, allowing you to:

• Compare months with ease.
• Estimate your future consumption.
• Detect increases caused by your habits and not by tariff changes.

Yes. In fact, it is an interesting option if you use:

• Electric radiators.
• Heat pumps or aerothermal systems.
• Portable heaters.

Thanks to the stable price, you can turn on the heating at any time without worrying if you are in a peak or off-peak period.

Yes, if you have a smart, remotely-managed meter, you can:

• Check your hourly consumption from the Customer Area or the Endesa app.
• Compare monthly, daily, or time-band consumption.
• Identify consumption habits and optimise your electricity use.

Note: The hourly analysis is for informational purposes, even though the price is the same all day.

If you have a solar panel installation with an active self-consumption tariff, you cannot sign up for this tariff. However, at Endesa, we offer the Endesa Solar Tariff, tailored specifically for you.

In general, our tariffs do not include a commitment period. However, in some cases we may offer you additional advantageous conditions linked to your acceptance of a commitment period, so you can enjoy those benefits.

If the tariff includes a commitment period, we will clearly inform you before you sign up. If you accept the commitment and decide to cancel before completing the first year, a penalty will apply equivalent to 5% of the estimated amount of energy pending supply until the 12 months from the start date are completed. This calculation is based on the contract price without discounts.

If the change is made after 12 months have passed, there will be no penalty, nor if you switch between tariffs within Endesa Energía.

You can terminate your electricity or gas contract at any time within the legal withdrawal period. To do so, simply complete the withdrawal form and send it through one of the following channels:

• Postal mail: ENDESA ENERGÍA S.A.U. – P.O. Box 818, 08080 Barcelona.
• Email: atencionalcliente@endesaonline.com.

Required documentation:

Please include the following details to ensure your withdrawal request is valid:

• Full name of the contract holder.
• National ID (DNI).
• Supply address.
• CUPS number.
• Bank account associated with the contract.

No, at the moment we don’t have any promotion linked to this rate, but you can enjoy Endesa’s best price.

The Government has approved a series of tax measures, published in Royal Decree-Law 7/2026, valid from 22 March, which applies to bills issued from that date and for an approximate period of three months.

On your electricity bill, VAT is reduced from 21% to 10% if your contracted power capacity is under 10 kW, and the Special Electricity Tax is also lowered from 5.113% to 0.5%. For gas, VAT is reduced from 21% to 10%, and a reduction in the Hydrocarbons Tax is applied, leaving it at €0.00108/kWh.

These measures can mean an approximate saving of 15% on your electricity bill (with a contracted power capacity of 4.41 kW and an annual consumption of 3,272 kWh) and 12% on your gas bill (with an RL2 access tariff and an annual consumption of 8,546 kWh), provided your bills are issued within the application period and you meet the established conditions.

The price stability commitment guarantees that your base price will be maintained for 2 years. However, this price may be adjusted if CPI variations are applied or if there are upward or downward modifications to regulated components outside the supplier's control.