Solar PV 8 kWp
- Capacity
- 8 kWp
- Rate
- P × (1,155 − 1,155/35 × P) €
- Residential cap
- €10,000
- Battery
- separate grant
Estimated grantapprox. €7,128
Klimabonus 2026
Energy grant in Luxembourg: Klimabonus 2026 amounts and how to apply
Solar, heat pump, insulation: which grants apply, the conditions attached and the authorised companies that can carry out the work.
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191 authorised energy and solar companies listed
10 000 €Maximum solar grant (residential)
191
Authorised energy companies
10 000 €
Maximum solar grant (residential)
12 000 €
Maximum heat pump grant
102
Localities covered
Company count from our directory; Klimabonus solar and heat pump amounts per guichet.public.lu. — Sources: guichet.public.lu
Calculation examplesCalculation example Calculation example Calculation example
Grants by type of work
These calculation examples use the official Klimabonus rates. The final amount depends on the audited invoice and the administrative decision.
Geothermal heat pump replacement
- Type
- Geothermal
- Situation
- Replacing fossil
- Cap
- €12,000
- Air-to-water
- up to €10,000
Estimated grantup to €12,000
Roof insulation
- Item
- Roof
- Rate
- per m²
- Condition
- minimum performance
- Combination
- with 3% VAT
Per official scalesee guichet.public.lu
Our promise
Real grants, delivered by authorised companies
A grant is only paid when technical requirements are met and an authorised company carries out the work. That is where your request goes.
- Detailed quotes within 48 working hours
- Insured companies with statutory guarantees
- Help with the documents the application needs
- A Luxembourg-only network
How it works
Estimate, build, apply
Order matters: the grant is claimed after the work, against the invoice.
- 1
Estimate your grants
Type of work, address and contact details. Two minutes are enough.
- 2
Have the work done
By an authorised company, with a detailed invoice and technical evidence.
- 3
File the application
With the competent administration, invoice and certificates attached.
Which energy grants exist in Luxembourg in 2026?
The Klimabonus programme covers most energy renovation support: solar PV, heat pumps, batteries, insulation, ventilation and EV charging.
Residential solar PV is capped at €10,000, following the official formula P × (1,155 − 1,155/35 × P) €, which grows less with each extra kWp. Heat pump caps depend on technology and situation, up to €12,000 for geothermal replacing fossil heating.
Exact amounts and conditions are published on guichet.public.lu, which we link directly.
What conditions apply?
Three recur: work carried out by an authorised company, minimum equipment performance, and filing within the deadline after invoicing.
Insulation requires a minimum thermal resistance; heat pumps are checked on performance coefficient and installation compliance.
A careful quote already states these values. If they are missing, ask before signing.
How do you claim a grant?
After the work, based on the paid invoice and technical certificates, plus proof of ownership or right of use.
Collect documents as you go: invoice, datasheets, before-and-after photos for insulation, electrical compliance certificate for solar.
Incomplete files are the main cause of delay.
Also worth reading
Frequently asked questions
Energy grants in Luxembourg: your questions
How much is the solar PV grant?
Residential support is capped at €10,000, following the official formula P × (1,155 − 1,155/35 × P) €. Official amounts are on guichet.public.lu.
What grant applies to a heat pump?
Up to €12,000 for a geothermal heat pump replacing fossil heating, and up to €10,000 for an air-to-water replacement.
When should I apply?
After the work, based on the paid invoice and certificates, within the prescribed deadline.
Can I combine the grant with 3% VAT?
In most cases yes, provided each scheme's own conditions are met.
Must an authorised company do the work?
Yes. DIY work or an unauthorised company is not subsidised.
Is the estimate binding?
No. Only the company quote and the administrative decision are binding.
Estimate your grants, then compare quotes
Two minutes to size up your support and receive offers from authorised companies.
- Authorised companies
- Reply within 48h
- All of Luxembourg
- Free and no obligation
