energysolutions.lu

It depends on system size. The formula tapers: smaller systems get proportionally more, and the absolute ceiling of €10,000 is reached at 15 kWp. For a typical 8 kWp system the Klimabonus comes to roughly €7,100, with about €2,220 on top for an 8 kWh battery. The calculator above shows your case.

Not since 4 January 2026. The approved installer deducts the Klimabonus directly from the invoice and settles with the state. You pay only the balance. One exception: a battery retrofitted later onto an existing system still follows the classic route, with the application filed after invoicing.

You cannot have both. Under the guaranteed feed-in tariff all generation is bought at a fixed rate for fifteen years; the Klimabonus requires self-consumption instead. For a household with normal daytime use, self-consumption usually wins over fifteen years, because avoided grid electricity is worth more than exported electricity. With very low self-consumption the balance can tip. We model both.

Turnkey, usually between €1,200 and €2,100 per kWp including VAT, depending on the roof, access and equipment. An 8 kWp system therefore lands roughly between €13,000 and €15,000. Batteries add around €700 to €900 per kWh. Differences between installers are substantial, so comparing quotes pays.

It typically lifts self-consumption from around 30 % to 55–70 %. Whether it pays depends on your electricity price and your usage pattern: someone out of the house during the day gains more than someone working from home. The Klimabonus of up to €2,250 shifts the maths noticeably in the battery's favour.

Around six weeks from signature to your first self-generated kilowatt-hour. Installation on a family home takes one to two days. What usually takes time is the grid registration and delivery, not the work on the roof.

For a standard rooftop system on an ordinary house, usually not. For listed buildings, protected zones, façade systems and ground-mounted arrays, yes. The commune decides — we clarify it before installation.

In an apartment block yes, via a decision of the owners' assembly; the subsidy is then calculated per dwelling. If you rent, a plug-in system up to 800 W remains an option and needs only the landlord's consent and a registration.

Your form details go to our team and to the installation partner handling your project, and nowhere else. No resale, no newsletter without your consent. The site sets no analytics or advertising cookies. Details are in the privacy policy.

Cela dépend de la puissance. La formule est dégressive : les petites installations sont proportionnellement mieux aidées, et le plafond absolu de 10 000 € est atteint à partir de 15 kWc. Pour une installation typique de 8 kWc, le Klimabonus tourne autour de 7 100 €, auxquels s’ajoutent environ 2 220 € avec une batterie de 8 kWh. Le simulateur ci-dessus affiche votre cas.

Non, plus depuis le 4 janvier 2026. L’installateur agréé déduit le Klimabonus directement de la facture et se fait rembourser par l’État. Vous ne réglez que le solde. Exception : une batterie ajoutée plus tard sur une installation existante suit la voie classique, avec demande après facturation.

Les deux ne se cumulent pas. Avec le tarif garanti, toute la production est rachetée à prix fixe pendant quinze ans ; le Klimabonus impose en échange l’autoconsommation. Pour un ménage à consommation diurne normale, l’autoconsommation l’emporte généralement sur quinze ans, parce que l’électricité évitée coûte plus cher que celle qui est injectée. Avec une autoconsommation très faible, l’arbitrage peut s’inverser. Nous chiffrons les deux.