Self-consumption: using the energy you produce

Become a prosumer

The energy transition involves us all. To make your contribution, you can produce your own solar energy and use it directly! Find out how to become a prosumer by opting for self-consumption when installing your photovoltaic installation.

The development of technology in recent years has made it possible for you to install photovoltaic panels at home and produce some of the electricity you need on a daily basis. This environmentally friendly solution – known as self-consumption – is also economical, as it allows you to reduce your electricity invoice, while selling the exceeding electricity to your supplier.

Self-consumption, total or partial

If you decide to opt for self-consumption, the first thing to do is to inform your grid operator.

You will also have to decide whether you want to use all of the electricity you produce, without feeding the surplus back into the grid, or whether you want to consume only part of the energy produced, feeding the surplus back into the grid. The answer to this question will have tax implications, as the income from the resale of the electricity produced will be taxed (for installations with a capacity of more than 10 KWp).

Between 15 and 30% of the energy produced is self-consumed

If self-consumption is a solution for the future, which allows you to gain independence from the variations in energy market prices, you should know that it is estimated that between 15 and 30% of the energy produced is actually used in your home. The rest of this energy generally has to be fed back into the grid.

This is simply because the time of energy production does not always correspond to the times when the family is at home and consumes the most energy.

Variable “Klimabonus” support depending on the choice of tariff model

Producing your own electricity is made even easier by the fact that the Klimabonus programme provides a range of investment grants for this type of project.

If you want to install photovoltaic panels at your home with the aim of consuming the energy produced yourself, you can benefit from “Klimabonus” financial aid

This can cover 20% or 62.5% of the cost of the installation, depending on whether you decide to opt for the guaranteed feed-in tariff for the resale of your electricity to the grid:

  • Option 1: 20% of the investment, if you opt for the state-guaranteed feed-in tariff for 15 years (upper limit of €500/KWp);
  • Option 2: 62.5% of the investment, if you opt for a variable feed-in tariff based on wholesale market prices from a supplier instead of the guaranteed feed-in tariff. (upper limit of €1,562.50/kWp).

This applies to installations for which the invoice is issued by 31 December 2025 at the latest.

If you choose option 2, the maximum amount of aid is 62.5% of the actual costs for investments in solar photovoltaic installations operated in self-consumption mode or as part of an energy community, provided that the order is placed in 2023 and the invoice is drawn up before 31 December 2025.

The application forms for the financial aid will be available on guichet.lu. The aid can be applied for after the installation has been completed.

Good to know

To benefit from this investment aid, the peak electrical power of the installation must not exceed 30 kWp.

If your installation is larger than 30 kWp, you will be taxed on the income from the sale of your electricity.

Good to know

To benefit from this investment aid, the peak electrical power of the installation must not exceed 30 kWp.

If your installation is larger than 30 kWp, you will be taxed on the income from the sale of your electricity.

Choosing your tariff model for the remuneration of the total energy fed into the grid

In addition to these practical elements, you will also have to choose between a guaranteed or flexible feed-in tariff model.

Option 1

By opting for the guaranteed feed-in tariff model, you benefit from a state-guaranteed feed-in tariff for a period of 15 years. You must conclude a feed-in contract with your grid operator.

Find out more about the upcoming state-guaranteed feed-in tariffs for installations from 0 kWp to 30 kWp below.

Option 2

If you opt for the flexible feed-in tariff model, you renounce the guaranteed feed-in tariff for the entire lifespan of the installation. You must conclude a feed-in contract with your energy supplier. The remuneration is a percentage of the wholesale market price, which varies monthly.

Steinergy offers you the market price (MW Solar) multiplied by a correction factor of 0.8, which takes into account the forecasting and price risks of the balancing energy.

If you are interested in a tailor-made offer based on market prices, waiving the state-guaranteed injection tariffs, please contact us at centrale.production@enovos.eu, specifying and adding the following documents to your request

  • Connection contract for the production facility from the grid operator
  • Grid usage contract from the grid operator

Table of historical values for the variable feed-in tariff (0.8 x MW Solar)

Caution: by opting for the flexible tariff, your remuneration can fluctuate significantly. Market prices are particularly volatile and are not the responsibility of the supplier. As an example, you will find below the average tariffs of the last few years, which are often lower than the guaranteed injection tariffs.

Please note that a photovoltaic installation also entails certain grid-related costs, as you will need a dedicated meter, for example. To see the tariffs of the different grid operators, click here (ILR).

Don’t forget your tax obligations

When you become an electricity producer, you can choose to be subject to VAT (and therefore be able to deduct it for certain operating expenses) or, on the contrary, benefit from the exemption system, if your turnover does not exceed 35,000 per year.

In both cases, you must register for VAT and file an annual VAT return, via MyGuichet for example.

Profits from the production of photovoltaic energy can also be taxed. However, this depends on your installation and the use made of the energy produced (self-consumption or total injection).

  • There is no taxation:
    • if you inject 100% of the electricity produced and you have an installation of less than 30 kWp;
    • if you are self-consuming without injecting the excess energy produced into the grid.
  • A tax is applied :
    • if you inject 100% of the electricity produced or if you have an installation of more than 30 kWp;
    • if you are self-consuming and inject the excess energy, a tax deduction is provided for depending on the level of self-consumption.

As a producer-seller of electricity, you can choose whether or not to be subject to VAT. Please note that according to L.I.R. circular no. 14/2 of June 2023, from January 2023, income from the sale of electricity generated by a photovoltaic installation with a capacity of 30 kWp or less, either individually or collectively, will not be subject to taxation. Above this limit, the operator is required to file an income tax return, and will be subject to taxation.

Photovoltaic installations > 30 kWp

For photovoltaic installations >30kWp, you can opt for one of the following two tariff options:

Option 1: State-guaranteed feed-in tariff

For your information, please find attached the current state-guaranteed feed-in tariffs for 15 years:

Option 2: Flexible feed-in tariff by a supplier (based on market prices)

If you are interested in a tailor-made offer based on market prices, waiving the state-guaranteed injection tariffs, please contact us at centrale.production@enovos.eu, specifying and adding the following documents to your request

  • Connection contract for the production facility from the grid operator
  • Grid usage contract from the grid operator

New customer?

You are not yet an Steinergy customer but you would like to take out a contract? Follow this link.

Already a customer?

Are you already an Steinergy customer? Take all the necessary steps in your customer area.

New customer?

You are not yet an Steinergy customer but you would like to take out a contract? Follow this link.

Already a customer?

Are you already an Steinergy customer? Take all the necessary steps in your customer area.

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How can I find out about my consumption?

If you have a my.enovos.lu account, you can consult the evolution and details of your consumption at any time by going to the “Consumption” tab of the customer portal.

If you do not have an account and you receive your bills in paper format, you will find information on your consumption on the second page, and on the third page the historical evolution of your consumption. This trend is also shown on the statement of account that you receive in paper format once a year.