Solar Panel Simulator Luxembourg
This information is used to analyse the solar potential of your roof
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Solar panels in Luxembourg: price, grants and payback in 2026
The Renov.lu solar simulator estimates the optimal kWp, annual output, 2026 Klimabonus grants and payback from your real roof address (Google Solar). Here are the reference figures used in Luxembourg.
Price of a solar installation
| Item | 2026 reference |
|---|---|
| Installed cost | ≈ €2,250/kWp |
| Power of one panel | 400 Wp |
| Output assumed by the simulator | ≈ 800 kWh/kWp/yr (cautious assumption, adjusted to your roof's sunshine) |
| Lifespan / warranty | 25 years |
| Grid electricity price | ≈ €0.26/kWh |
| Surplus sold at market price (with Klimabonus) | ≈ €0.06/kWh (estimate) |
| Guaranteed feed-in tariff 2026, 15 years (without Klimabonus) | €0.1333/kWh (≤ 10 kWp) · €0.1252/kWh (10-30 kWp) |
| Home battery | ≈ €710/kWh |
Solar grants 2026 (Klimabonus + municipal)
| Scheme | Amount | Cap |
|---|---|---|
| Solar Klimabonus (self-consumption, waiver of the guaranteed feed-in tariff), from 2 kWp | kWp × (1,155 − 33 × kWp) | €10,000 from 15 kWp (no maximum power) |
| Home-battery grant, from 2 kWh | kWh × (500 − 27.8 × kWh) | €2,250 from 9 kWh |
| Complementary municipal grants | vary by municipality (often 10 to 50% of the Klimabonus) | depends on municipality |
Pre-financing is optional: the installer can deduct the Klimabonus from your invoice, for the same amount. The municipal grant is requested separately from the municipality.
How the simulator works
- Enter the address of the installation: the roof solar potential is analysed via Google Solar.
- Enter your annual electricity use to size the optimal kWp.
- Get your estimate: output, 2026 grants, payback and a free PDF report.
Frequently asked questions
How much does a solar PV installation cost in Luxembourg in 2026?
Around €2,250 per kWp installed. A 6 kWp residential system therefore costs about €13,500 before grants.
What solar grants are available in Luxembourg in 2026?
The solar Klimabonus is granted from 2 kWp according to the formula kWp × (1,155 − 33 × kWp), then €10,000 from 15 kWp, with no maximum power. Condition: self-consumption, with a waiver of the guaranteed feed-in tariff. On top come the home-battery grant (up to €2,250, from 9 kWh) and municipal grants that vary by municipality (often 10 to 50% of the Klimabonus). Pre-financing by the installer is optional and does not change the amount.
Are solar panels worth it in Luxembourg?
Yes, but you have to choose between two options, which cannot be combined. With the Klimabonus (up to €10,000), you waive the guaranteed tariff: the electricity you consume yourself saves buying power at the grid price (about €0.26/kWh) and the surplus is sold at market price (about €0.06/kWh, estimate). Without the Klimabonus, the surplus is bought back at the 2026 guaranteed tariff for 15 years. Payback mainly depends on your self-consumption rate: the simulator calculates it for your roof.
How many kWp does my house need?
On average about 1 kWp per 1,000 kWh consumed per year. The simulator computes the optimal power from your roof area and irradiation (Google Solar).
What annual output can I expect in Luxembourg?
The simulator uses a cautious assumption of about 800 kWh per installed kWp per year, adjusted to your roof's actual sunshine (Google Solar). A 6 kWp system therefore produces around 4,800 kWh/yr.
What is the feed-in tariff?
For a first feed-in in 2026, the tariff guaranteed for 15 years is €0.1333/kWh up to 10 kWp and €0.1252/kWh from 10 to 30 kWp. It cannot be combined with the Klimabonus: if you apply for the Klimabonus, the surplus is sold at market price.
Do I need a home battery?
A battery raises your self-consumption rate. Expect about €710/kWh, with a Klimabonus grant from 2 kWh that reaches €2,250 from 9 kWh.
Learn more: solar panels guide · solar grants · payback · self-consumption