All legal persons (SA, SARL, cooperatives) who:

• are established in Luxembourg;
• are engaged in an economic activity as their main occupation;
• invest in solar photovoltaic power plants; and
• meet the general conditions that apply in this matter.

Luxinnovation is the first contact point for businesses that also supports them in their administrative procedures. You can contact Luxinnovation at the following email address: aides@luxinnovation.lu.

The first consumption of electricity produced by the plant must take place within 18 months after the aid is granted. If this time limit cannot be met for duly justified reasons beyond the company's control, more time may be granted upon written request to the ministers.

The call for projects with a maximum budget of EUR 10 million, divided into 3 lots, is open from 17 July to 30 September 2026.

Allowable costs

Investments related to the installation of the plant.

Operating costs and costs involved in complying with legal, regulatory or administrative requirements in force are not eligible.

The allowable costs do not include taxes or other deductions. The list of allowable costs is as follows:

• purchase and installation of electrical equipment (photovoltaic modules, inverters, junction boxes, cabling, etc.);
• purchase of the structural elements supporting the modules;
• engineering and development costs;
• setting up the connection (connection costs, transformer, civil engineering works);
• purchase of the storage system and the associated installation costs (the usable storage capacity, expressed as a proportion of the photovoltaic plant’s power output, is greater than or equal to 1 kWh per kWp).

Competition and project selection

For each sublot, tenders received within the deadline and not eliminated under the provisions set out in the tender specifications are ranked:

• by reference aid amount A_r (as stated in the application form), weighted in ascending order [lowest aid amount per installed capacity (€/kWp)];
• in case of equal weighted reference aid amount, by ascending power output;
• in case of equal weighted reference aid amount and power output, by a lottery between the ex-aequo application files.

The weighted reference aid amount (in €/kWp) is calculated by multiplying the reference aid A_r by a weighting factor, which takes into account the size of the photovoltaic installation.

For each sublot, tenders are selected in ascending order of the ranking established by the method described above, until the last tender chosen allows to exactly reach the maximum amount of aid for the sublot under consideration. If the maximum amount of aid is exceeded for the sublot concerned, the last eligible tender that led to the maximum amount being exceeded is removed and the award process is stopped.

In case of under-subscription of sublot(s), a competitiveness clause is provided for, as well as a transfer of unallocated amounts. The competitiveness clause implies that no more than 90% of the admissible projects presented in the context of the call for projects may be selected. If the number of projects submitted is less than 10, at least 1 project will be rejected.

Submitting the application

You must submit the application for aid using the online assistant available on MyGuichet.lu.

You or your agent (authorised representative) will need a LuxTrust product or an electronic identity card (eID).

The application must be filed before the commencement of the work.

Supporting documents

Applications for aid must include the following information and documents:

• an organisation chart allowing for the identification of the company and the group (single economic entity) to which the company belongs, forms providing information on the size of the company and possibly the company's statutes;
• the official annual accounts of the applicant company and related companies (or consolidated group accounts);
• a bank account identification document;
• a CCSS certificate stating the number of employees;
• a certificate of right of use of the installation site;
• a description of the project (Excel template provided)
• quotation.

Additional documents may be required in particular:

• if the site where the power plant is installed is a 'ZAE site' (article 2.2. of the specifications);
• if the plant is a roof-mounted plant with 'light' modules (article 2.2.1. of the specifications).

As of now, beneficiaries of selected projects with a capacity strictly exceeding 500 kW (see articles 6.2 and 7.3 of the tender specifications) are required to provide a financial performance guarantee.

The minister can request information on the contractual relations between the parties involved in order to ascertain the need for the aid.

Maximum amount of financial aid

No group (single economic entity) may receive aid for one or more projects in an amount exceeding 40% of the budget per lot.

Indicative multi-annual timetable

Without prejudice to other specific calls for tenders that may be launched, the Ministry of the Economy hereby publishes an indicative multi-year schedule for the two calls for tenders relating to investment aid and operating aid (market premium contract):

* depending on the available budget. Depending on the successive results of the calls for tenders, this breakdown could be adjusted.

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