Turnkey Solar Installation: Detailed Quote Example in Luxembourg (2026)

Understanding Turnkey Solar Installation

A turnkey solar installation means you entrust the entire project to a single provider who handles everything: technical study, sizing, equipment supply, installation, grid connection, and administrative procedures. In Luxembourg, this formula is increasingly popular because it simplifies the owner's life and ensures project coherence.

A typical quote for such an installation must be detailed and transparent. It should include all steps, from the technical visit to commissioning, including subsidy follow-up. A good quote also mentions warranties on equipment (often 25 years for panels, 10 years for the inverter) and on labor (usually 2 years).

Components of a Typical Solar Quote

A complete quote breaks down into several items. Here are the main elements you'll find in a Luxembourg quote:

• Photovoltaic panels: cost depends on power (in kWp) and panel quality. For a single-family home, installations often range from 6 to 12 kWp. Price is between €0.8 and €1.2 per Wp, i.e., €8,000 to €12,000 for 10 kWp.
• Inverter: converts DC to AC. Micro-inverters are more expensive but allow better production monitoring. Expect €1,500 to €3,000.
• Storage battery: increasingly requested for self-consumption, it adds significant cost. A 10 kWh battery costs between €6,000 and €10,000.
• Installation labor: includes panel mounting, wiring, and commissioning. Cost varies with roof complexity (tile, slate, metal) and accessibility. Budget €3,000 to €5,000.
• Administrative procedures: grid connection, Klimabonus subsidy application, municipal permits. A serious installer includes these services in the quote, for €500 to €1,000.

Financial Aids in Luxembourg: Klimabonus Wunnen 2026

Since January 2026, the Klimabonus Wunnen program has replaced the former PRIMe House system. Managed by Klima-Agence, it offers attractive subsidies for solar installations. For photovoltaic installations, the aid can reach €10,000 for a capacity up to 10 kWp (about €8,300 for 10 kWp, with the maximum granted from 15 kWp). For a home battery, the bonus is €2,250.

These aids are subject to conditions: the installation must be carried out by a certified professional and the equipment must meet certain standards. The exact amount depends on installed capacity and battery capacity. It's essential to check the latest rates on the Klima-Agence website or via guichet.lu.

In addition to the subsidy, the super-reduced VAT rate of 3% applies to renovation work in homes over 2 years old. This is a considerable advantage, as standard VAT is 17%. This represents savings of several thousand euros on a €20,000 quote.

Example Quote for a House in Luxembourg

To illustrate concretely, let's take a typical case: a single-family house in Luxembourg City with an annual consumption of 5,000 kWh. The installer proposes a 10 kWp system with a 10 kWh battery. Here's an example of a detailed quote (illustrative case, not a real one):

After deducting the Klimabonus subsidy (maximum €10,000 for PV and €2,250 for battery), the net cost for the owner is approximately €13,809. This amount can be further reduced if a municipal grant applies. With such an investment, the payback period typically ranges from 8 to 12 years, depending on self-consumption rate and electricity buy-back price.

Choosing an Installer and Verifying the Quote

To benefit from subsidies, it is mandatory to use a certified installer. In Luxembourg, certification is issued by Klima-Agence or recognized bodies. Check that the professional holds the CleanTech label or equivalent. A good installer should provide you with:

• Shading and feasibility study
• Estimated production calculation
• Panel layout plan
• Financing or leasing proposal
• Clear explanation of subsidy procedures

Beware of quotes that are too vague or too low. A detailed quote must mention brands and models of equipment, warranties, execution timelines, and the cost of each step. Don't hesitate to compare several quotes (typically 3) and ask for references.

Administrative Procedures for Solar Installation

In Luxembourg, a photovoltaic installation requires several authorizations. First, a declaration of works must be filed with your commune if the capacity is less than 10 kWp and the installation is integrated into the building. Beyond that, a building permit may be required. The installer usually handles these procedures.

Next, you must contact the grid operator (Creos) for connection to the electricity network. A connection request must be made, and an injection contract may be signed. Connection costs are included in the quote or billed separately. Finally, the Klimabonus subsidy application is made online via the Klima-Agence website, before the start of work. It is imperative to respect this deadline to be eligible.

Optimizing Your Installation to Maximize Savings

To make your installation profitable, it's essential to optimize your self-consumption rate. This involves using a storage battery and controlling your electrical appliances (water heater, heat pump, electric car) during production hours. A good installer will advise you on battery sizing and energy management solutions.

The buy-back tariff for injected electricity is also an important factor. In Luxembourg, the tariff is regulated and may evolve. In 2026, it is around €0.10/kWh for installations under 30 kWp. With rising electricity prices, self-consumption becomes increasingly advantageous. A well-sized installation can cover 30-50% of a household's needs, and up to 70% with a battery.

Conclusion and Outlook

Investing in a turnkey solar installation in Luxembourg is a wise decision, both ecologically and economically. Thanks to the Klimabonus Wunnen 2026 and reduced VAT, the net cost has become affordable. However, it's crucial to carefully analyze quotes, verify installer certification, and understand administrative procedures. By following these tips, you can enjoy clean energy and reduce your electricity bill for many years.

For further reading, check our other articles on solar panels in Luxembourg and energy renovation aids.