Voltmax Energy Solutions in Luxemburg
Klimabonus 523
Photovoltaics (New Regime)
What is Klimabonus 523?
Klimabonus 523 is a public subsidy scheme in Luxembourg supporting the installation of Photovoltaikanlagen (PV) under the new regulatory regime.
The programme is intended for building owners who want to:
ihren eigenen Strom mit Solarenergie erzeugen möchten,
operate their photovoltaic system primarily in Eigenverbrauchsmodus,
reduce dependence on the electricity grid,
contribute to climate protection.
Technische Anforderungen an Photovoltaikanlagen
To be eligible for Klimabonus 523, the photovoltaic installation must meet the following technical conditions:
Der installed peak output must be at least 2 kWp, with no upper technical limit.
Der maximum subsidy amount of €10,000 is reached with an installed capacity of 15 kWp.
Photovoltaic panels may be:
montiert werden auf dem Dach,
installiert werden an der Fassadeoder
in die Gebäudehülle integriert werden.
Die Installation ist an folgenden Gebäuden zulässig:
Wohngebäuden, und
Nichtwohngebäuden.
Hybride Solarkollektoren zur gleichzeitigen Erzeugung von Strom und Warmwasser sind ebenfalls förderfähig.
Zusätzliche Photovoltaikanlagen
Eine zusätzliche Photovoltaikanlage auf demselben Dach, an derselben Fassade oder in derselben Gebäudehülle is eligible if:
the injection of electricity into the grid takes place at least two years after der ersten Einspeisung der vorherigen Anlage erfolgt.
For apartment buildings with fewer than three residential units, this rule applies individually to each unit, unless:
the applicant already owns an existing photovoltaic installation, or
the applicant belongs to a household that owns such an installation.
Subsidy calculation method
The subsidy amount is calculated using a formula based on the installed peak power (kWp) of the photovoltaic system.
The calculation follows the official formula defined in the regulation and results in a progressively adjusted subsidy amount– bis zu €10,000.
📅 Gültigkeit:
applies to signed offers dated until 31 December 2029.
Key conditions for receiving the subsidy
To benefit from Klimabonus 523, the following conditions must be fulfilled:
Der Antragsteller muss für die gesamte Lebensdauer der Anlage auf den garantierten Einspeisetarif verzichten.
This decision is firm and irrevocable.Eine Stromabnahmevereinbarung muss für überschüssigen Strom mit einem Stromlieferanten abgeschlossen werden.
The installation must be operated in Eigenverbrauchsmodus.
Collective self-consumption oder
participation in an energy community is also permitted.
Pre-financing option
For photovoltaic installations under Klimabonus 523, a pre-financing option is available.
Key points:
Der pre-financing application must be submitted by the installer via a secure government platform.
Installers must first be listed in the register of eligible installers for the pre-financing procedure.
The beneficiary must be a natural or legal person who owns the building.
The building must include at least one residential unit.
The beneficiary cannot be a company engaged in an activity requiring an establishment authorisation.
In the case of co-ownership, either:
the building manager, or
a designated co-owner
may act as the beneficiary.
Non-eligible projects
The following projects are not eligible for Klimabonus 523:
projects where a deposit exceeding 30% of the final price (including VAT) has already been paid,
installations covered by a leasing contract.
Feed-in tariff without investment subsidy
The option of a guaranteed feed-in tariff remains available.
However, no financial support for installation costs is granted under this option.The level of the feed-in tariff depends on the Netzanschlussdatum of the installation, in accordance with the applicable regulations.
Besteuerung von Photovoltaikeinnahmen
Für das Steuerjahr 2022sind Einnahmen aus Anlagen über 10 kWp steuerpflichtig.
From the 2023 tax year onwardssind Einnahmen aus Anlagen über 30 kWp steuerpflichtig.
How to apply for Klimabonus 523
Without pre-financing
The subsidy application can be submitted after the installation has been completed.
With pre-financing
The subsidy must be applied for by the installer before work begins.
Klimabonus – sozialer Zusatzbonus
Förderfähige Haushalte können einen sozialen Zusatzbonus beantragen , nachdem sie den Bewilligungsbescheid für die Klimabonus-Förderung erhalten haben.
Applications must be submitted to:
Guichet unique des aides au logement
11, rue de Hollerich
L-1741 Luxemburg
Großherzogtum Luxemburg
📧 guichet@ml.etat.lu
📞 (+352) 8002 10 10
Erforderliche Antragsformulare
Klimabonus – Basisförderung
“Demande d’une aide dans le cadre du paquet banque climatique et logement durable – DEPA-2026 – Personne physique”
(oder das Formular für Personnes morales)“Installation photovoltaïque – Fiche PHOT-2026”
Klimabonus – sozialer Zusatzbonus
“Demande en obtention d’une aide à l’assainissement énergétique (F3)”
“Déclaration relative à la composition de la communauté domestique (L/A21)”
“Déclaration sur l’honneur – Acquisition (A92)”
Validity of the Klimabonus 523 scheme
The Klimabonus 523 basic subsidy applies to:
Anlagen – sie müssen ordered no later than 31 December 2029, und
applications submitted no later than 31 December 2031.