Up to €10,000 in grants
Solar panel quotes in Luxembourg: compare 3 free offers
Three steps, two minutes: installers established in Luxembourg review your roof and offer a technical visit, then a quote with the grant deducted.
How it works
- Describe your projectOne request for 3 quotes
- Companies contact youEstablished in Luxembourg, within 48 working hours
- Compare and chooseFree and no obligation
Ask for three quotes on the same scope, drawn up after a visit of your roof: in Luxembourg, a 6 kWp system is priced at €10,500 to €13,000 including VAT (renov.lu price survey, September 2026). Each quote must show the output, the estimated production and the Klimabonus (€5,742 for 6 kWp); if the installer is listed in the pre-financing register, it deducts the grant and the deposit is capped at 30%.
- Three quotes for the same output, within 10%, and the same content
- Reference price: €10,500 to €13,000 incl. VAT for 6 kWp, i.e. €1,750 to €2,170 per kWp (renov.lu price survey, September 2026); €1,600 to €2,200 per kWp from 6 to 15 kWp
- Credible production: about 1,000 kWh per kWp per year on a south roof, 1,067 kWh at most according to PVGIS
- Grant deducted: €5,742 for 6 kWp if the installer is listed in the pre-financing register
- Deposit: at most 30% of the price incl. VAT with pre-financing; 3% VAT
Receive three comparable quotes
Describe your roof and consumption: installers established in Luxembourg will offer a site visit and a quote with the grant deducted. Three quotes: enough to compare, without being contacted by a dozen companies.
What a solar PV quote must contain
A serious quote can be read without calling the installer back. Insist on these six items:
Output and named equipment
kWp, number, brand and model of the modules and inverter (hybrid or not), mounting system.
Estimated production and its assumptions
In kWh per year, with orientation, tilt and shading. Above about 1,070 kWh per kWp, the PVGIS value for a south roof in Luxembourg City, the estimate is optimistic.
Itemised price and VAT
Equipment, installation, electrical work, scaffolding, commissioning, 3% VAT; the rate for any battery on a separate line.
Chosen scheme, grant and deposit
Klimabonus (deducted with pre-financing) or the guaranteed feed-in tariff, an irreversible choice; with pre-financing, a deposit of at most 30%.
Paperwork included
Registration with the grid operator, end-of-works declaration, grant application, check of the municipality’s rules.
Warranties and timetable
Product, performance, inverter and workmanship warranties, each with its duration; installation and commissioning dates, offer validity.
Compare three solar quotes with four calculations
Offers never describe exactly the same system: bring each one down to four figures. A 20 to 30% gap for the same output is common and is almost always explained by the roof, the inverter or the scope.
| Calculation | How | Benchmark |
|---|---|---|
| Price per kWp | Price incl. VAT ÷ output | €1,600 to €2,200 from 6 to 15 kWp |
| Production per kWp | Stated production ÷ output | ≈ 1,000 kWh due south, ≈ 870 kWh east or west |
| Net cost | Price incl. VAT − Klimabonus | €4,758 to €7,258 for 6 kWp |
| Scope gap | What one quote includes and the other does not | Scaffolding, electrical panel, monitoring, paperwork |
Pitfalls to avoid before signing a solar quote
Costly mistakes are made at signature, not on the roof.
| Pitfall | Consequence | Remedy |
|---|---|---|
| Filling the whole roof | Surplus sold at market price; grant capped from 15 kWp | Start from consumption: how many kWp |
| Ignoring shade | A chimney or tree pulls down a whole string of modules | Shading study; optimisers only on the modules affected |
| Forgetting the municipality | Work blocked if a permit was required | Check the building regulation before ordering |
| Installer not in the register | No pre-financing: you advance the grant | Check the register on guichet.lu |
| Deposit above 30% | Outside pre-financing rules, risk if the company fails | Write it as a percentage of the price incl. VAT |
| Choosing the scheme without a calculation | Klimabonus or tariff: irreversible choice | See payback and feed-in tariff |
| Postponing the battery | Battery alone not pre-financed; inverter to replace if not hybrid | Decide now or insist on a hybrid inverter |
| Installing on a worn roof | Removing and refitting the modules to be paid for | Renew the roof covering first |
Klima-Agence advises private individuals free of charge (8002 11 90), independently of any installer: useful for reviewing two quotes that disagree.
Reference prices in brief
In Luxembourg, an installed system costs €6,000 to €7,500 incl. VAT for 3 kWp, €10,500 to €13,000 for 6 kWp and €14,500 to €18,500 for 9 kWp, without a battery (renov.lu price survey, September 2026); the 2026 Klimabonus is €3,168, €5,742 and €7,722 for these sizes (official formula on guichet.lu). Details: solar panel costs and solar grants.
Request your solar panel quotes
Three steps, two minutes: your goal, your roof, your contact details. Installers established in Luxembourg review your project and offer a site visit. Free and without obligation.
Frequently asked questions about solar panel quotes
How many quotes should I get for a solar PV system?
Three quotes are enough if they cover the same output, within 10%, and the same scope: equipment, installation, paperwork and warranties. Bring each down to its price per kWp and production per kWp to compare them. On renov.lu, your request goes to 3 installers: professionals established in Luxembourg whose business permit has been checked. You compare without being swamped with calls, free and without obligation, usually with a reply within 48 working hours.
What must a solar panel quote in Luxembourg contain?
The output and named equipment, the estimated production with its assumptions, an itemised price with 3% VAT, the chosen scheme, the grant deducted and the deposit, the paperwork included, the warranties and the timetable.
Is a site visit needed before the quote?
Yes, for a firm quote: it checks the roof, shading, the cable route and the electrical panel. An offer based on a satellite photo is only an estimate, often revised after the visit.
Is a much cheaper solar quote suspicious?
Not necessarily: a 20 to 30% gap for the same output is common. Check what is missing, the stated production and whether the installer is in the pre-financing register, and be wary above all of a high deposit.
Should the quote show the Klimabonus deducted?
Yes, with pre-financing: the installer deducts the grant from the invoice incl. VAT, €5,742 for 6 kWp, and the deposit stays capped at 30%. Otherwise, the quote should at least state the expected grant, which you will claim after installation.
Which warranties should a solar quote include?
Four warranties written separately: module product, performance, inverter and workmanship, the last covering waterproofing and fixings. For each, the duration and the guarantor, manufacturer or installer.