If you are still looking for the PRIMe House, be aware that it no longer exists under that name: since 4 January 2026, the Luxembourg state support for a photovoltaic installation is called the Klimabonus. The change is not merely cosmetic, and one point in particular decides whether your project pays off: the grant and the feed-in tariff cannot be combined. This page explains that choice and what follows from it.
The Klimabonus 2026 programme officially took over from the PRIMe House scheme on 4 January 2026 as the framework for energy transition support in Luxembourg.
Yet choosing between the investment grant and the guaranteed feed-in tariff remains a difficult dilemma for many owners. We break down the criteria of the Klimabonus for solar panels in Luxembourg and the steps on MyGuichet.lu to help you maximise the return on your photovoltaic installation.
Klimabonus for solar panels in Luxembourg: the new framework
The Klimabonus scheme 2026 has replaced PRIMe House since 4 January 2026. The state grant, calculated according to the installed capacity, forces an exclusive choice between the self-consumption grant and the guaranteed feed-in tariff.
The Klimabonus 2026 programme officially succeeded the PRIMe House scheme on 4 January 2026.
What comes next is tied to the shift in administrative thinking that took place at the start of 2026.
From the PRIMe House scheme to the Klimabonus 2026
The PRIMe House programme now belongs to the past. The new Klimabonus scheme came into force on 4 January 2026 and now frames your solar projects.
The change aims to simplify support for residents. The state wants to give future investors a clear view.
The Klimabonus 2026 steadies the Luxembourg residential market for the years ahead. This reform clarifies your rights.
The government's ambition remains the energy transition. The country's electricity sovereignty depends on it directly.
Support calculated on the installed capacity
The amount of your grant now depends solely on the capacity of your installation. The higher the installed capacity, the higher the support, within clearly defined limits. The state has set upper limits for each capacity band.
You should consult the official sources on guichet.lu to check the current scales. That data sets out the eligibility thresholds for your photovoltaic project.
The award criteria are fully transparent. Every owner can work out their financing in advance.
Planning certainty for residents
The Luxembourg government is betting on continuity. This regulatory framework protects your solar assets against unforeseen legislative swings. That is peace of mind for your household.
National energy independence is becoming a concrete priority. Producing locally reduces the strain on the shared electricity grid.
Thanks to that planning certainty, your major investments gain visibility over several decades. Returns then become easier to predict.
Your installation contributes to the global climate effort. Luxembourg actively supports this citizen step through MyGuichet.lu, with an approved installer.
How do you choose between self-consumption and export?
But before the panels go up, a strategic decision has to be made about how you handle your electricity.
Why the grant and the guaranteed tariff cannot be combined
This is the single most important point of the reform. You cannot receive the Klimabonus grant if you choose to sell your entire energy output.
Mutual exclusion is the golden rule. That choice must be thought through before the technical contract is signed.
Favour self-consumption. Only that mode of operation unlocks the direct support paid out by the Luxembourg administration.
Full export closes the door to the grant for good. Stay alert on this point.
What choosing full export to the grid means
Opting for full export means you sell every kilowatt-hour you produce. You then receive a guaranteed tariff over a long period. That gives predictable income but denies you the direct use of your own green electricity.
| Criterion | Self-consumption | Full export |
|---|---|---|
| Eligible for the Klimabonus grant | Yes | No |
| Direct use of the energy | Yes | No |
| Type of return | Savings | Guaranteed tariff |
| Main objective | Autonomy | Financial yield |
Giving up the grant is final. There is no going back once the application is validated.
What self-consumption brings your household
Using your own electricity is the best way to bring your bills down. It saves you from buying energy at a high price from conventional suppliers. The gain is immediate.
This model encourages energy independence. You become less exposed to swings in electricity prices on the European market.
Self-consumption is the lever that maximises returns thanks to the payment of the state grant.
Make a success of your solar installation in Luxembourg. Start preparing your MyGuichet.lu paperwork now.
Getting more out of your panels and your equipment
So to get the best from your installation, you have to look beyond the photovoltaic modules alone.
How batteries and heat pumps work together with solar
Adding a home battery lets you store the surplus produced during the day. You then draw on that reserve in the evening. It raises your real self-consumption rate considerably, day after day.
Heat pumps complete the set-up perfectly. They turn your solar electricity into heat for your home heating.
A managed smart control system optimises when power-hungry appliances switch on, while the sun is at its highest.
The synergy between these devices is the key to success. Your home becomes a high-performing ecosystem.
Fitting electric mobility into your project
Charging your electric vehicle from your own solar panels is a solution with a future. You install a smart charging point that talks to your inverter. That lets you drive on completely free energy, produced on your own roof.
- Lower fuel costs
- Use of the solar surplus
- Added property value for the home
Anticipating your mobility needs is essential. Electric cars consume a lot of energy.
Using the Klima-Agence online calculator
Before you commit, use the free tools available. The Klima-Agence calculator assesses your needs precisely. It works out the theoretical return on your solar project.
Use the online calculator on klima-agence.lu to assess the synergy between your panels, your battery and your heat pump.
You can obtain a personalised solar study to refine your project.
Analyse your simulation data. Do not sign any quote without having checked the technical consistency of the commercial offer you received.
This tool avoids sizing mistakes. It is essential for any new project.
Completing your grant application via MyGuichet.lu
Once the technical side is settled, what remains is clearing the administrative hurdle to receive your support.
The obligation to use an approved installer
Entitlement to the Klimabonus is strictly reserved for work carried out by approved professionals. An approved installer guarantees that the installation complies. For the state, that is an absolute condition.
Be wary of overly tempting offers from unlisted companies. Always check the qualifications against the official Luxembourg lists.
Their signature on the technical documents is essential to validate your final grant application. Take no unnecessary risk.
Quality workmanship also ensures the longevity of the system. Do not take this choice lightly.
Preparing the supporting documents for the state
To submit your application on MyGuichet.lu, you must gather several essential documents. Itemised invoices and certificates of conformity are compulsory. Every document must be perfectly legible to avoid an administrative rejection. A complete file speeds up processing.
- Paid invoices
- Installer's certificate
- Technical data sheet for the panels
- Bank account details
Klima-Agence advisers can help you. They check that your documents are valid.
If you have any doubt about your documents, call 8002 11 90. Advisers are available Monday to Friday, from 8am to 12pm and from 1pm to 5pm.
Following the procedure on the secure platform
Once the file is submitted online, the validation process begins. The Luxembourg authorities examine every application carefully. You can follow progress in real time on MyGuichet.lu.
Processing times vary with the flow of applications. You sometimes have to wait a few weeks before the final payment.
This platform brings together all your dealings with the state and so guarantees maximum security for your data. It is the official tool you cannot avoid.
Payment of the grant officially closes your project. You then enjoy the full benefit of your investment.
The Klimabonus scheme 2026 secures your solar investment by imposing a strategic choice between grant-backed self-consumption and tariff-backed export. Simulate your returns with the Klima-Agence now, before you complete your steps on MyGuichet.lu. Take this opportunity to finance your energy transition through the new Klimabonus for solar panels in Luxembourg.
How much do you actually get?
We publish no amount in this article: the Klimabonus scale depends on the installed capacity, it is capped, and it changes. A figure copied here would be wrong within a few months. The official scale is available on guichet.lu, and the Klima-Agence offers a public calculator. We also keep the scheme up to date on our Luxembourg page, with its source and verification date.
