Is there anything you would still like to know? Have a look through our FAQs

In the same way, CYE is a company that creates a family with its customers, its employees and its agents. A family that is better together, and that will always be willing to help when needed.

What is the CUPS?

CUPS is the Universal Supply Point Code and identifies each electricity supply point. In Spain it begins with ES and is made up of 20 or 22 digits.

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How do I take out a contract online?

If you are interested in taking out a contract with CYE ENERGÍA, you can do it yourself from the “CONTRACTING” section of our website.

Simply fill in the fields with the requested data (you can find them all on the invoice of your current supplier) and attach the required documentation (mainly a copy of your ID) at the end.

The data will arrive directly to our system, and as long as there are no errors or documents missing, it will be processed immediately.

The next thing you will receive is an email welcoming you to CYE.

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Established contracting periods

Taking out a contract with CYE Energía is done in two phases. Firstly, we send you the contract that you need to sign (with the information you have previously provided us with) and then we process it with the Distributor.

Once we have sent the request, the acceptance and activation will remain in the hands of the Distributor, which, depending on the type of operation, establishes the following activation terms:

7-10 days for rate and power changes 10-15 days for new customers
(From the moment of acceptance)

Ownership changes are usually carried out immediately at the time of processing, or will take 24-48 hours at the most.

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Does changing my supplier cost money or mean my electricity might be cut off?

Changing your supplier does not imply any cost and at no time will it leave you without an electricity supply. without an electricity supply. If, when you change your supplier, the power goes up, the voltage changes, you install self-consumption, etc., it is very likely that you will have to pay some of the regulated costs.

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Why am I not receiving bills or why do I receive bill estimates?

At CYE ENERGÍA we issue invoices when the Distributor sends us the meter readings. For this reason, one or more of the following circumstances may occur:

1. “I am not receiving my bill.” If your bill does not arrive when you expect it, don’t worry. The Distributor does not always send the readings on the same day of the month. It may happen a few days earlier or later than the previous month. This is completely normal and should not be a concern, unless it has been more than 30 days since you received your last bill. If this happens, please contact us and we will process a claim.

2. “The bill I received has estimated readings” or “the bill I received has 0 consumption”. There are times when the Distributor cannot access the meter readings. In order not to leave the customer without an invoice, it issues one with estimated readings or with an energy reading = 0. If this happens to you, you shouldn’t worry, since we automatically claim all invoices that have been issued with non-real readings or with energy consumption = 0.

As soon as the Distributor sends us the actual readings, we will issue you a payment invoice (if you have paid more than you owed) or we will invoice you for the difference (if you have paid less than you owed).

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How do I pay an invoice that my bank returned to you?

If for any reason one or more of your invoices are returned to us by your bank, we offer 3 payment methods:

1. Repayment through your bank: Contact us and ask us to charge it through your bank account again.
2. Payment by bank transfer: make a bank transfer for the amount owed and indicate your ID number in the concept so that we know that the payment is coming from you. Remember to send us proof of the transfer. Ask us for the income account number.
3. Payment by card: call us and tell us that you wish to pay by card, and we will send you a link for you to do so..

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We are your trusted electricity company

logo CYE recortado

We are your trusted electricity company

Because for us you are much more than a contract code or a rate of consumption. Do you need us? We will respond.

If you have any kind of technical issue with your supply (for example, the power has gone out or there has been a power surge that has caused damage to your home or business) you are welcome to contact us. However, it is advisable to call your Distributor directly, since these types of incidents in the electrical network are within the competence of the Distributor. They will be able to give you all the details of what happened and the expected time for the incident to be resolved.

If after the incident you wish to claim for the damage caused, write to us at informing us of what happened in the most detailed way possible, as well as indicating the damage so that we can claim the corresponding compensation from the Distributor.

The factor that determines if your supply is in LV or HV is the level of tension or voltage (V) of the network to which the supply is connected. If the transformer is owned by the customer, then the supply will be connected to HV.

If the voltage is less than or equal to 1 kV, it would be in LV.

Above 1 kV is considered HV.

We can however specify that between 1 kV and 36 kV has long been classified as Medium Voltage (MV), and when it is greater than or equal to 36 kV, HV.

Through the Third-Party Remote Access rate (TRA), we know if your supply is connected to LV or HV:

· The LV Tariffs are 2.0TD and 3.0TD (both V ≤ 1 kV).

· The HV Tariffs are differentiated by voltage levels and are grouped as follows:

6.1TD (1 kV < V < 30 kV)

6.2TD (30 kV ≤ V < 72,5 kV)

6.3TD (72,5 kV ≤ V < 145 kV)

6.4TD (V ≥ 145 kV)

There is a particular circumstance in some supplies that are connected to HV, but which have their own transformer with LV output, and have LV metering equipment. Since this situation entails a loss of energy in the transformation, as regulated by Royal Decree 1164/2001 of October 26, the losses calculated by the Distributor will be added to the energy measured by the meter in the supply bill.

When we talk about fixed modality and indexed modality, we refer to the type of tariff that is applied to the energy in your supply contract.

The fixed Tariff is a price modality that, if there are no changes in the regulatory framework during the term of the contract, will remain stable and will be the same in each invoice. This price modality entails the signing of a permanence contract, during the period stipulated in said contract.

The indexed Tariff is a variable modality in which the price at which we will pay for energy is linked to the price of energy in the electricity market, which varies from hour to hour For this reason, in each invoice we will obtain a price which is adapted to the oscillations of the market. The indexed price modality has no permanence contract.

Both the transmission and distribution tolls and the charges are costs regulated by the Government that apply to both the term of power and energy. Therefore, the kWh (energy) and kW (power) will always be included in the price at which the kWh (energy) is paid. Normally, for the indexed prices, you can see them detailed in the invoice.

On the one hand, the tolls include the cost involved in getting and having the energy available in our supply.

On the other hand, the charges are the cost that the Government has estimated to be able to keep the electricity system in operation and maintain the premium system for renewables

With the application of the new access tariff modality of June 1, 2021, proposed by the CNMC in Circular 3/2020, hourly periods are established for all electricity supply tariffs (2.0TD, 3.0TD, 6.1TD, etc.).

Each period has a defined number of hours per day. Therefore, depending on the time in which the energy is consumed, the price corresponding to that time period will be applied.

The reason for the different prices according to the time period is determined, to a greater extent, by the costs of tolls and charges. In P1, higher costs are applied than in P2, which in turn will have higher tolls and charges applied than P3, and so on. The reason is very simple, P1 represents the hours in which we consume the most. This situation is justified by saying that it is a way of trying to make the electrical system more efficient, as the user will try to move their consumption to cheaper hours (with less energy congestion), and it is therefore more balanced out.

Sometimes we can find a fixed price with a single period, that is, the same price 24 hours a day. This formula only occurs with fixed prices.

Usually, yes, since the tolls and charges have a lower cost in these periods, but in situations in which the Government introduces exceptional measures, such as the reduction of charges (which produce a greater balance of their cost between scheduled periods) and/or, in the case of the indexed modality and the gas cap adjustment mechanism there may be situations in which these periods have a higher price than others and are therefore more expensive.

Both terms refer to the Electrical Installation Certificate. This certificate is essential to be able to contract electricity or make technical modifications and confirms that the installation meets the necessary technical conditions and requirements for its correct operation. It also indicates the maximum contractable power and the supply voltage.

It must be issued by an authorised installer and submitted to the competent body in your community.

The electrical connection is that which connects the supply to the distribution network.

The meter is normally owned by the relevant distribution company, and therefore a meter rental fee is paid to them. This is billed through the electricity supply bill and is required to be able to account for the consumption of your supply.

There is also the option of buying a meter or renting it from another company. However, this option is recommended for company or industrial power supplies This is how the distributors obtain all the information possible to adapt and optimise their consumption, resulting in greater advantages.

They are called connection rights and refer to the set of costs that the client must pay when the Distributor registers the installation of a new supply or the expansion of an existing one.

– Rights of access. As the name indicates, they are those derived from giving access to the electricity transmission network and the cost is €19.7/kW (to be contracted or expanded) + VAT.

– Extension rights. This refers to the maintenance of the infrastructure that provides electricity to the supply. Its cost is €17.37/kW (to be contracted or extended) + VAT.

– Grid-connection rights. Those related to the intervention of the distributor. Its cost is €9.04/intervention + VAT.

These costs are established and charged by the Distributor through an invoice issued by CYE called the “access invoice”.

The most common procedures that these costs involve are: new registration, power increase or activation of self-consumption.

*Note: Due to current supply circumstances you may not have to pay all these costs, only some of them. To find out how much you will have to pay in your specific case, please contact us.

High Voltage (up to 36 kV):

– Grid-connection rights: €79.49 + VAT.

– Access rights: €15.72 + VAT for each kW that the contracted power is increased.


– Extension rights: €16.99 + VAT for each kW that the contracted power is increased.


At CYE ENERGÍA we have a Customer Area where you can check your invoices and your contract whenever you want.

When you receive your welcome email, click on the link it contains and you will be able to choose a password and then log in. The username is the email associated with your contract.

You can also access your Customer Area through the “CUSTOMER AREA” option on our website’s menu or with the following link:

If you cannot remember your password, click on “did you forget your password?” and an email will be sent to reset it.

If you cannot access the Customer Area, contact us and we will help you.

The indexed tariff varies from month to month depending on the behaviour of the Electricity Market (OMIE website, heat map). The great advantage of this mode is that you can benefit from the months in which the market price is stable and economical. In addition, indexing does not entail any type of permanence. It is the cheapest option in the medium-to-long term.

In contrast to this is the fixed tariff. The advantage of this mode is the convenience of always paying the same per KWh throughout the term of the contract. The disadvantage is that it involves a permanence contract of 12 months and is usually more expensive in the medium-to-long term.

Through the installation of self-consumption, you can achieve great savings on your bill by consuming directly from what your installation produces As well as this, the amount you produce that is not consumed can be returned to the network, thus benefiting from a simplified compensation of the surplus.

The surplus compensation is made based on the OMIE market price, which is a variable price calculated per hour. For this compensation, we will take into account the hours of generation according to the photovoltaic production surplus curve. If said curve is not available, the hours of greatest surplus generation will be taken into account, which are defined from 1.00 pm to 4.00 pm (inclusive) and then multiplied by 0.98.

For example, if the resulting price is €150/MWh (€0.150/kWh) it would be compensated at: 0.150 × 0.98 = €0.147/kWh. Doesn’t sound too bad, does it?

Don’t hesitate to ask us if you think that having a self-consumption installation in your home is feasible, since it is the most profitable solution in the short and long term to save on your electricity bill.

To benefit from the Social Tariff, you must change to the main supplier in your area, since CYE ENERGÍA cannot offer this option because it belongs to the free market and does not have authorisation from the Government and the CNMC to do so.

At CYE ENERGÍA we can be the representatives if you have grid-connected photovoltaic installations and self-consumption; cogeneration installations of any technology, fuel and group; hydraulic and mini hydraulic installations; or biomass facilities.

As a Representative Agent in the Electricity Market, we carry out all the technical and administrative processing of our clients before the system operator, Red Eléctrica de España (REE), the market operator (OMIE), the distribution company and the National Commission of Markets and Competition (CNMC).

We are owners of various photovoltaic plants, so we perfectly understand your needs and demands as a producer. We are able to offer you an economic representation service that will help you maximise the profitability of your installations; a personalised, amicable and trustworthy service, face to face, with complete transparency.

For legal certainty and data protection, at CYE ENERGÍA we carry out all the changes in supply by email.

If you wish to make any changes to your supply, please contact us via email at contratos@cye-energí indicating what you wish to do and identifying your supply point by means of the account holder’s ID or CUPS. This is so we can tell you what the information is and/or documentation that you have to provide and what are the steps to follow according to what needs to be done.

The required documentation for each type of change is indicated below.


Identification of the supply point by means of the CUPS (you can find this on your bill) or ID number of the current holder.

CIF of the new owner in case it is a company.

ID number of the new owner, or ID number of the representative in case it is a company.

Telephone and contact email.

Account number.

Proof of the change. In other words, a document which proves that the new owner is related to the address of the supply point (lease contract, property tax, deeds…).


Identification of the supply point by means of the CUPS (you can find it on your bill) or the ID of the holder.

New account number.

– Full name and copy of the ID of the bank account holder, in case it is different from the supply holder.


Identification of the supply point by means of the CUPS (you can find it on your bill) or the ID of the holder.

Desired powers in each of the periods.

Cancelling a supply means disconnecting from the Distribution Network, so the supply would remain permanently without electricity. This implies that if someone subsequently wanted to register again with the energy company, they could face elevated costs.

One alternative to a definitive withdrawal is to change the owner’s name, a procedure that is managed by us at no cost. This means that the ownership of the supply is transferred to the person who is currently occupying the address/premises, and the new person will begin to take care of the bills, meaning you are no longer associated with the supply point.

At CYE ENERGÍA we set out to be the most transparent supplier on the market. For this reason, in your electricity bill we detail all the market costs that make up the price of our bills.
If you would like to understand all the sections of your electricity bill, we encourage you to read this article on our blog.

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Electricity tariffs

Home tariffs
Business tariffs

For homes and small businesses with low consumption.

For homes and small businesses with low consumption.

For homes that combine supply and self-consumption.

We design our tariffs so that you can have the best service at the best price, whether at home or for your business. Discover yours .

Forget about “time of day” metering.

Designed for high consumption.