With the Klimabonus reform that came into force on 1 January 2026, solar power has never been more accessible in Luxembourg. The grant can now reach €10,000 for a solar installation, VAT on residential panels has been cut to a zero rate, and the grant is deducted directly from your invoice. Here is everything you need to know to install, finance and get a return on your solar panels in 2026.
New: estimate your grants in 30 seconds. Our renovation aid calculator works out your Klimabonus, the bonuses and the VAT saving based on the official 2026 rates.
Why install solar panels in Luxembourg in 2026?
Luxembourg receives an average of 1,000 to 1,100 useful hours of sunshine per year — enough for a well-oriented photovoltaic installation to produce most of your household electricity consumption. Three factors make 2026 particularly favourable:
- A stronger grant: the 2026 Klimabonus now heavily subsidises self-consumption, with a grant of up to €10,000.
- The price of electricity: after several years of tariff volatility, generating your own power provides lasting protection against grid price increases.
- Added property value: a home fitted with panels and a battery has a better energy performance rating — an increasingly decisive selling point when reselling or renting.
How much does a photovoltaic installation cost?
The cost of an installation is calculated per kWp (kilowatt-peak), the unit of panel capacity. In Luxembourg in 2026, you should budget on average €2,100 to €2,300 per kWp installed, including labour and inverter.
| Capacity | Approx. roof area | Indicative cost (before grant) | Typical household |
|---|---|---|---|
| 3 kWp | ~15 m² | €6,300 – €6,900 | Couple, small house |
| 5 kWp | ~25 m² | €10,500 – €11,500 | Family, medium-sized house |
| 8 kWp | ~40 m² | €16,800 – €18,400 | Large house, EV + heat pump |
A storage battery typically adds €4,000 to €8,000 depending on capacity, but lets you use in the evening the energy produced during the day — a major advantage for self-consumption.
The 2026 Klimabonus grants for solar power
Since 4 January 2026, the State grant favours self-consumption. Two schemes exist side by side:
Self-consumption scheme (the most advantageous)
The grant covers up to 50% of the cost of the installation, capped at €1,250 per kWp, up to a total of €10,000. In return, you give up the guaranteed feed-in tariff: the electricity you produce is used in your own home first.
Feed-in scheme
The grant is 20% of the cost, capped at €500 per kWp. In exchange, you benefit from a guaranteed feed-in tariff for 15 years, set at €0.1374/kWh in 2026. This scheme cannot be combined with the self-consumption scheme of the new Klimabonus.
Storage battery
An additional grant of up to €2,250 is available for installing a battery coupled to your photovoltaic system.
Good to know: the grant is pre-financed. Since 2026, the approved installer deducts the grant amount directly from your invoice — you no longer have to front the cash while waiting for the State to pay out.
Worked example: a 5 kWp self-consumption installation
Take a family installing 5 kWp in Mersch for a cost of €11,000 including VAT:
- Cost of the installation: €11,000
- Klimabonus grant (50%, capped at €1,250/kWp, i.e. €6,250): €5,500
- Net cost to you: €5,500
With an annual output of around 4,500 kWh and a high self-consumption rate, the saving on your electricity bill comes to around €900 to €1,200 per year. The return on investment typically comes between 5 and 7 years, for a panel lifespan of 25 to 30 years.
The exact amounts depend on your capacity, the scheme chosen and your income. Check your specific case with our aid calculator or on guichet.public.lu.
Conditions and steps to follow
To qualify for the photovoltaic Klimabonus, a few key rules apply:
- Approved installer: the installation must be carried out by a qualified company registered in Luxembourg.
- Approval in principle: in most cases, a prior application is required before work begins.
- Grid connection: your grid operator (Creos or the local provider) validates the connection and the bidirectional meter.
- Eligible invoice: keep all paid invoices; the payment request is made via MyGuichet.lu.
Some municipalities also grant a municipal subsidy that can be combined with the Klimabonus — check with your local council.
Choosing the right solar installer
The quality of the installation determines the actual output and durability of the system. A few good habits:
- Compare several quotes: the price per kWp and the equipment offered vary considerably from one installer to another.
- Check the company’s legal registration in Luxembourg — on tack.lu, every professional is a verified company registered with the trade register.
- Ask for details: brand and efficiency of the panels, type of inverter, warranty (product and output), and connection arrangements.
- Plan ahead: allow for compatibility with a future battery or an EV charging station if you drive an electric car.
To receive up to 6 quotes from verified installers, request your free quotes — no obligation and 100% free.
FAQ
What is the maximum grant for solar panels in Luxembourg in 2026?
Under the self-consumption scheme, the 2026 Klimabonus covers up to 50% of the cost, capped at €1,250 per kWp and €10,000 in total. An additional grant of up to €2,250 is available for a storage battery.
Is it better to choose self-consumption or feed-in?
Since 2026, self-consumption is clearly more advantageous: the grant is higher (up to 50% versus 20%) and you protect yourself against rises in the price of electricity. Feed-in remains attractive if your daytime consumption is low and you prefer the guaranteed buy-back tariff over 15 years.
How long does it take to get a return on photovoltaic panels?
After deducting the Klimabonus, the return on investment generally comes between 5 and 7 years for a self-consumption installation, while the panels last 25 to 30 years.
Do I have to front the grant amount?
No. Since 2026, the Klimabonus grant is pre-financed: the approved installer deducts it directly from your invoice, so you only pay the net cost.
How much roof area do I need for 5 kWp?
Allow around 25 m² of well-oriented roof (ideally due south, without shading) for a 5 kWp installation, i.e. around a dozen panels depending on their individual capacity.
