Solar panel grants and subsidies in Luxembourg — complete guide 2026
In 2026, Luxembourg offers one of the most generous solar support schemes in Europe. Under the new Klimabonus Wunnen regime (in force since 4 January 2026), you can receive up to €10,000 for solar panels and €2,250 for a storage battery — deducted directly from your invoice via the pre-financing mechanism. Add the 3% reduced VAT, municipal grants, and Enoprimes: your installation can be funded at over 50% by public funds. This guide details every grant, its conditions, and the steps to claim everything you’re entitled to.
Overview: all available grants for your solar panels in 2026
Luxembourg’s solar support system rests on four stackable pillars, complemented by an attractive financing option via the Klimaprêt. Each grant has specific conditions, but they can all be combined to significantly reduce your out-of-pocket cost. For a 5 kWp installation, it is common to achieve an out-of-pocket cost below €3,000 after combining all available grants.
| Grant | Max. amount | Main condition | Stackable |
|---|---|---|---|
| Klimabonus — panels | €10,000 | Self-consumption, ≥2 kWp, ≤30 kWp | ✓ Yes |
| Klimabonus — battery | €2,250 | Linked to PV system in self-consumption mode | ✓ Yes |
| Reduced VAT 3% | ~€1,540* | Supply + installation of panels (excl. battery) | ✓ Yes |
| Municipal grants | variable | Depends on your municipality | ✓ Yes |
| Enoprimes (Enovos/Creos) | variable | Enovos or Creos customer | ✓ Yes |
| Klimaprêt (BIL/BCEE) | €100,000 | Housing ≥ 10 years, 1.5% interest subsidy | ✓ Yes |
* Estimate on an €11,000 installation, VAT 3% vs 17% standard.
The key change in 2026 is the introduction of pre-financing (third-party payment): since 4 January 2026, the Klimabonus grant is deducted directly from your invoice by the installer. You only pay the net balance, without waiting for any reimbursement from the State. This is a structural shift that removes the main financial barrier that previously discouraged many homeowners from investing.
The 2026 Klimabonus: up to €10,000 for your solar panels
The Klimabonus Wunnen is the main Luxembourg state grant for photovoltaic installations. Its new scheme, in force since 4 January 2026, represents a major overhaul: the amount is no longer calculated at 50% of installation cost capped at €1,250/kWp, but rather follows a degressive formula based on installed capacity — with an absolute ceiling of €10,000 reached at 15 kWp. This new structure is particularly advantageous for small to medium installations (3–8 kWp), which represent the vast majority of Luxembourg residential projects.
Klimabonus amounts for solar panels (self-consumption)
| Installed capacity | Estimated Klimabonus | Typical profile | Cost after Klimabonus* |
|---|---|---|---|
| 3 kWp | ~€3,750 | Couple, small home | ~€2,750 – 3,250 |
| 5 kWp | ~€6,250 | Family of 4 | ~€4,250 – 5,250 |
| 8 kWp | ~€9,170 | Large family or EV owner | ~€7,830 – 9,330 |
| ≥ 15 kWp | €10,000 (max.) | Large property | from ~€21,500 |
* Excl. reduced VAT and municipal grants. Use the simulator for a personalised estimate.
Since 4 January 2026, the new Klimabonus is only granted to installations operated in self-consumption mode, with an explicit waiver of the guaranteed feed-in tariff. In the vast majority of cases, the combined grants available in self-consumption mode make it significantly more financially advantageous than the guaranteed feed-in tariff.
2026 pre-financing: zero upfront cost for your solar installation
This is the major innovation of 2026. Since 4 January 2026, a pre-financing mechanism (third-party payment) has been introduced by the Luxembourg Ministry of Economy and Ministry of the Environment. It fundamentally changes how photovoltaic installations are financed in the Grand Duchy: whereas you previously had to advance the full cost and wait months for reimbursement, you now pay only the net balance after deduction of the Klimabonus.
You sign the quote with a certified installer registered for pre-financing
The installer must be registered in the official pre-financing registry published by the Ministry of Economy on Guichet.lu. Without this registration, the third-party payment mechanism is unavailable.
The installer deducts the Klimabonus directly from your invoice
You receive an invoice with the Klimabonus amount clearly deducted. You pay only the remaining balance — no upfront financing required on your part.
The installer submits the application via MyGuichet.lu
The installer handles all administrative aspects of the Klimabonus application. You have nothing to do administratively.
The State reimburses the installer within 30 days
The Environment Administration (AEV) reimburses the installer directly within 30 days of full dossier validation. You are entirely outside this financial circuit.
Your installation must operate in self-consumption mode with a minimum capacity of 2 kWp. The installer must be registered in the official registry on guichet.public.lu. Check this before signing any quote.
Home battery: up to €2,250 in additional grant
A specific grant is available for installing a storage battery alongside your solar panels. It is fully additional to the panel Klimabonus — you can combine both without restriction. The maximum of €2,250 is reached for a battery with a capacity of 9 kWh.
A storage battery is particularly valuable in self-consumption mode: without a battery, a standard household typically self-consumes around 30–40% of the electricity produced. With a well-sized battery, this rate rises to 60–70%, further reducing your dependence on the grid and accelerating your return on investment.
| Building type | Max. subsidised storage capacity | Max. grant | Notes |
|---|---|---|---|
| Single-family home | 1.5 kWh/kWp installed (max. 12 kWh) | €2,250 at 9 kWh | Min. 2 kWh required |
| Apartment building | 1.5 kWh/kWp (max. 9 kWh/unit) | €2,250 at 9 kWh/unit | Per housing unit |
The reduced 3% VAT does not apply to storage batteries — only to solar panels, inverters, and their installation. Batteries remain subject to the standard 17% VAT rate. Factor this into your financing plan.
Reduced VAT at 3%: an often underestimated saving
The reduced VAT rate of 3% (vs. the standard 17% in Luxembourg) applies to the supply and installation of photovoltaic panels under Luxembourg’s VAT rules for energy renovation works. This benefit is applied directly on the installer’s invoice — your installer applies it automatically, with no extra steps required from you, provided the installation is for an existing residential building.
For a standard installation at €11,000 excl. tax, the difference between 3% and 17% VAT represents a concrete saving of €1,540. This adds directly on top of all other grants with no additional formalities.
| Equipment / service | VAT rate |
|---|---|
| Solar panels, inverter, mounting rails, cabling, electrical protections, bidirectional meter | 3% |
| Storage batteries | 17% — not eligible |
| EV charging stations | 17% — standard rate |
Municipal grants: a bonus of up to 50% of the state grant
In addition to national grants, many Luxembourg municipalities offer supplementary municipal grants for photovoltaic installations. These are fully stackable with the Klimabonus and other schemes, and generally range between 20% and 50% of the state grant received. This can represent several additional thousands of euros.
Examples include Niederanven (up to 50% of the state grant), Steinfort (20%, max. €2,500), and several other municipalities including Mamer, Bech, Mertzig, and Luxembourg City. These figures are indicative — always check with your municipal administration before starting works, or use the Klima-Agence simulator at aides.klima-agence.lu which includes up-to-date municipal grant amounts.
Amounts and conditions vary by municipality and may change from year to year. Always check with your municipal administration before starting works.
Enoprimes: energy supplier grants
The Enoprimes programme, managed by Enovos and Creos in partnership with the Klima-Agence, offers supplementary grants to energy customers in Luxembourg for energy renovation works, including photovoltaic installations. These grants are fully stackable with the state Klimabonus, municipal grants, and reduced VAT.
The process is straightforward: you register your project with your energy supplier before starting works (this is a mandatory prerequisite). Once works are completed and the dossier validated, the grant is paid directly into your bank account. Your accredited installer can usually manage this process on your behalf. For the exact amount you can claim, visit enoprimes.lu.
The Enoprimes application must be registered before signing the quote with the installer. If you sign the quote first, you permanently lose entitlement to this grant. This rule is strictly enforced without exception.
Klimaprêt: financing the remainder at preferential rates
Once all grants have been deducted, you typically have a remaining balance to finance — even if it can be quite modest (sometimes below €2,000 for a well-subsidised 5 kWp installation). For this balance, the Klimaprêt allows you to borrow at particularly favourable conditions, with a 1.5% interest subsidy borne by the Luxembourg State.
Available from accredited banks (BIL, BCEE in particular), the Klimaprêt can finance up to €100,000 of energy renovation works including solar panels. It is accessible to homeowners whose property is at least 10 years old, and is fully stackable with all other grants described in this guide.
Guaranteed feed-in tariff: an alternative to self-consumption
The guaranteed feed-in tariff is an alternative scheme where all electricity produced is fed into the grid and purchased at a fixed tariff guaranteed for 15 years. For 2026, this rate stands at €0.1374 per kWh for new installations. This amount is guaranteed for the full 15-year period from the date of first injection.
Installations opting for the guaranteed feed-in tariff are not eligible for the new 2026 Klimabonus scheme. In the vast majority of cases — especially for installations of 3 kWp and above — self-consumption is financially more advantageous over 15 years, thanks to the combined grants. It is advisable to model both scenarios with a certified installer before deciding.
Combining all grants: worked examples
Example 1 — Family of 4, standard house — 5 kWp
| Total installation cost (excl. VAT) | €11,000 |
| VAT saving (3% vs 17%) | − €1,540 |
| Klimabonus (5 kWp, self-consumption) | − €6,250 |
| Municipal grant (est. 20%) | − €1,250 |
| Estimated out-of-pocket cost | ≈ €1,960 |
Excl. battery. Indicative estimates 2026. Estimated payback period: 2–3 years.
Example 2 — Large family with EV + battery — 8 kWp
| Total installation cost (excl. VAT) | €21,500 |
| VAT saving on panels (≈ €18,000 excl. VAT) | − €2,520 |
| Klimabonus panels (8 kWp) | − €9,170 |
| Klimabonus battery (7.5 kWh) | − €1,875 |
| Municipal grant (est. 20%) | − €1,834 |
| Estimated out-of-pocket cost | ≈ €6,100 |
Indicative estimates 2026. Estimated annual production: 6,800–7,600 kWh/year.
Calculate your exact out-of-pocket cost
Use our simulator for a personalised estimate, then request free quotes from certified installers in Luxembourg.
Full eligibility conditions for 2026 photovoltaic grants
| Criterion | Condition |
|---|---|
| Minimum capacity | 2 kWp — below this, no Klimabonus is granted |
| Maximum capacity (residential) | 30 kWp — beyond: industrial category, not eligible for residential Klimabonus |
| Operating mode | Self-consumption mandatory, with formal waiver of guaranteed feed-in tariff |
| Location | Roof, façade, building envelope, carport or garden shelter physically attached to the home |
| Tax exemption | Surplus injection revenues are fully tax-exempt for installations ≤ 30 kWp |
| Second installation | Eligible if first grid injection occurs at least 2 years after the first installation’s commissioning |
Step-by-step guide to claiming your photovoltaic grants
Simulate your project and grants
Use the Klima-Agence simulator for official grant amounts by municipality, or our photovoltaic ROI guide to evaluate your overall return on investment.
Register your Enoprimes application before signing the quote
If you are an Enovos or Creos customer, register your Enoprimes application before signing any contract with the installer. This is a mandatory prerequisite — you cannot claim it after signing. Visit enoprimes.lu.
Choose an installer registered for pre-financing
Check the official registry on guichet.public.lu. Compare at least 2–3 quotes — the price difference can reach €2,000–4,000 for the same installation.
Declaration of works with your municipality
Usually a simple notification; a building permit may be required in protected areas. Your installer handles this in a full-service approach.
Installation on your roof (1–2 days)
Panels are mounted in superimposition on bolted mounting rails. No modification of your existing roof covering is required in most cases.
Creos connection and bidirectional meter installation
Creos replaces your existing meter with a bidirectional meter measuring both consumption and injection, within a few weeks of the installer’s request.
Klimabonus application (handled by installer with pre-financing)
Your installer submits the application via MyGuichet.lu and deducts the grant from your invoice. You pay only the net balance. The State reimburses the installer within 30 days.
Apply for municipal grants
Contact your municipal administration after receiving your Klimabonus notification to apply for any applicable communal grants within the allotted deadline (generally 3–6 months after works completion).
Frequently asked questions about solar grants in Luxembourg
What is the maximum amount of solar grants available in Luxembourg in 2026?
Combining all available grants: up to €10,000 in Klimabonus for panels (self-consumption, cap at 15 kWp), plus €2,250 for a home battery, approximately €1,540 in VAT savings (on an €11,000 installation), plus variable municipal grants (between 20% and 50% of the state grant). For a standard 5 kWp installation, combined grants can bring the out-of-pocket cost below €2,000 — making Luxembourg one of the most attractive countries in Europe for residential solar investment.
How does the 2026 Klimabonus pre-financing work in practice?
Since 4 January 2026, your installer (if registered in the official registry on guichet.public.lu) deducts the Klimabonus amount directly from your invoice. You pay only the net balance. The installer then submits the application via MyGuichet.lu and the State reimburses the installer within 30 days. This applies only to self-consumption installations with a minimum capacity of 2 kWp.
Can I combine the Klimabonus with municipal grants and Enoprimes?
Yes, all these grants are fully stackable. The one mandatory rule is that you must register your Enoprimes application before signing the installer’s contract — otherwise you permanently forfeit this grant. The Klimaprêt (low-interest loan from accredited banks) can also complement all of these grants.
Is my installation eligible if I opt for the guaranteed feed-in tariff?
No. Since 4 January 2026, installations operating under the guaranteed feed-in tariff are no longer eligible for the new Klimabonus scheme. In the vast majority of cases, self-consumption mode is financially more advantageous over 15 years thanks to the combined grants.
Are surplus injection revenues taxable in Luxembourg?
No, for residential installations of 30 kWp or less. Revenues from surplus injection into the grid are fully tax-exempt. Beyond 30 kWp, revenues become taxable and must be declared.
Simulate your grants and compare quotes for free
Use our simulator to find out exactly what grants you’re entitled to in 2026, then request and compare up to 3 free quotes from certified installers in Luxembourg.