I produce and self-consume my own photovoltaic electricity

• Is my roof well exposed for an installation? I find out the solar potential of my roof with the solar cadastre.
• The solar cadastre also provides me with an assessment of whether the orientation and inclination of my roof are appropriate. It aims to identify the areas that are most exposed to the sun’s rays in order to determine the most suitable placement for my solar panels.
• The solar cadastre also allows me to find out the feed-in tariff category I will benefit from when I will feed my electricity production back into the grid. The tool allows me to estimate information such as the available surface and the possible power.
• By refining my search, I can configure the tool to find out more about the profitability of my future installation (dimensions and costs per kW_p, etc.), I get an overview of the estimated income and I can activate an option to calculate a loan amount to support my project.
• At the end of the process, I get my personalised results and detailed information on available subsidies in the form of a PDF.

In addition to the information obtained from the solar register, I can obtain free advice from a Klima-Agence advisor by calling the hotline or during a home, telephone or videoconference consultation. Klima-Agence also advises me on feed-in tariffs, state and municipal subsidies, as well as the necessary procedures for having my system installed.

Contact a Klima-Agence advisor

• I get bids from tradesmen and clarify any additional work required.
• I make sure that the tradesmen have thoroughly studied the situation on site before making their offer. If necessary, the craftsman can also perform a profitability analysis in addition to the previously simulated return.

• I check with my municipality to find out which permits and authorisations are required.
• At the same time, I find out about any available municipal grants.
• As soon as possible, and with the help of my contractor, I contact my grid operator to get him to preauthorise my power system and (once the system has been installed) to provide its final approval. If I want to self-consume my own electricity, its best to already inform him about this decision.
• At the same time, I inform myself about the process and conditions of the installation.

List of network operators active in Luxembourg

• If my home is classified as a cultural heritage building, I should also contact the responsible institute INPA (Institut national pour le patrimoine architectural) (formerly SSMN – Service des sites et monuments nationaux)

• The craftsman I choose must provide me with the relevant information and explain the precise sequence of operations.
• In the case of a renovation, roofing work and an extension of the electrical installation will be necessary during the installation of the panels.

After the work has been completed, I apply for the state subsidies granted under the Klimabonus programme.

There are two types of investment aid, both of which allow self-consumption and feed-in to the network.

• 20% investment subsidy: in addition to this subsidy, I will receive a state-guaranteed feed-in tariff for 15 years for the electricity fed into the grid.
• 50% investment subsidy: if I apply for this subsidy, I forgo the feed-in tariff and sign a sales contract with an energy supplier for the electricity fed into the grid.
  For quotations signed between 1.1.2023 and 31.12.2023: increase of investment aid to 62.5 %.

In both cases, I benefit from support and income that enables me to offset my investment. As a self-consumer, I can also reduce my dependence on electricity market price rises.
Find out about Klimabonus subsidies and feed-in tariffs.
I find the necessary form (PHOT-2022) on the emwelt.lu website.

• I contact my electricity grid operator and complete the necessary steps with them.
• The grid operator will carry out the final inspection and approval of the system.
• Once it has been authorised, my system will be connected to the electricity grid and will be able to supply it with solar-generated electricity.
• The feed-in tariff is guaranteed by the grid operator.

If I want to self-consume my electricity, I have to do in addition the following steps :

• I contact my grid operator to inform he about my decision to self-consume.
• I sign a feed-in contract with an electricity supplier of my choice (LINK to the list of suppliers) to sell my surplus electricity.
• Once the grid operator has approved my self-consumption and I've signed the feed-in contract, I'm ready to use my own electricity!

Tax year 2022

• If the output of my photovoltaic installation exceeds 10 kW_p, I declare the financial profits from electricity production on my tax return, as these are taxable.
• I do not declare any profits generated by installations with a power of less than 10 kW_p, which are not subject to tax.

Tax year 2023 

• If the output of my photovoltaic installation exceeds 30 kW_p, I declare the financial profits from electricity production on my tax return, as these are taxable.
• I do not declare any profits generated by installations with a power of less than 30 kW_p, which are not subject to tax.

Manuel : Tax treatment of a natural person operating a photovoltaic system

• I can avoid a drop in efficiency by having my photovoltaic system checked by a specialist and, if necessary, cleaned every 5 to 10 years.