What do solar panels cost in Luxembourg?

Ask each installer to separate panels, inverter, mounting, cabling, electrical-board changes, labour, scaffolding and grid-connection work. Note whether roof repairs, monitoring and disposal of old equipment are included. Compare totals including VAT, not a mixture of net and gross prices.

A useful brief includes your address, roof type, approximate usable area, existing electrical setup and any planned heat pump, EV charger or battery. The installer should check shading and roof condition before presenting a final design.

Luxembourg's official VAT guidance says that supply and installation of solar panels on private housing are directly subject to 3% VAT. Ask the installer to show the rate and tax-inclusive total on the written offer.

Klimabonus depends on the applicable scheme, order date and technical conditions. Do not subtract a fixed percentage from the quote: the official 2026 scheme calculates photovoltaic and battery support by installed capacity: the PV amount follows a formula up to a maximum of €10,000 from 15 kWp, and battery support reaches a maximum of €2,250 from 9 kWh of usable capacity. Conditions include a minimum of 2 kWp mounted on or integrated into the building, operation in self-consumption mode and an express waiver of any regulated feed-in remuneration; surplus electricity can still be sold at market price. Invoices must fall between 4 January 2026 and 31 December 2029, and the application is filed after installation. Check the official rules for your project before ordering and ask the installer to identify the scheme and application route in writing.

A payback estimate needs an annual-production forecast for your roof, your expected daytime use, the import and export tariffs in your contracts, maintenance assumptions and the final cost after any confirmed aid. Ask the installer to show these inputs and a less sunny or lower-self-consumption scenario. If you claim Klimabonus, exported electricity is valued at the market-based price in your contract, not at a regulated feed-in tariff. No payback period is guaranteed.

If a quote includes a battery, compare the system with and without it. A battery changes the investment and self-consumption assumptions; it does not automatically improve the financial return.

For storage, compare usable capacity, inverter compatibility, warranty conditions and any extra electrical work. Ask who handles the grid-connection request and what is included in that price. Permit requirements can vary with the building and commune, particularly for protected properties. Have the installer confirm the relevant steps before you sign; do not assume every roof is exempt.

Compare at least two written offers using the same roof and project brief. Check system size, module and inverter models, expected production with assumptions, included electrical and roof work, warranty terms, installation schedule, VAT-inclusive total, grant assumptions and responsibility for grid and administrative steps. Treat a grant estimate as provisional until eligibility and amount are confirmed under the applicable official scheme.