What grant is available for solar panels in Luxembourg in 2026?

Under the Klimabonus 2026 scheme, a photovoltaic system operated for self-consumption qualifies for a grant calculated with the formula P × (1,155 − 1,155/35 × P), capped at €10,000 from 15 kWp, for a minimum capacity of 2 kWp.

Is there a grant for a storage battery?

Yes: a home battery grant following the formula Q × (500 − 500/18 × Q), capped at €2,250 from 9 kWh, for a minimum capacity of 2 kWh.

Grants & incentives · Klimabonus 2026

Solar power is supported in Luxembourg

The State funds part of your photovoltaic system. Here are the official grants in force, their amounts and their conditions — based on guichet.public.lu and the Klima-Agence.

10 000 €max PV grant

2 250 €max battery grant

0 €upfront (pre-financing)

Calculator · Klimabonus 2026

What does solar really cost you?

Drag to size your system. We deduct the government grant live — you see your real remaining cost.

Your address (matches your real roof)

System size15panels6.0 kWp

Min · 5Large roof

Your turnkey project

Power: 6.0 kWp · 15 panels
Estimated output: 5 400 kWh/year
Turnkey price (3% VAT): ~11 780 €

Government grant (Klimabonus)−5 742 €

The government covers ~49% of your system

Your remaining cost

~6 038 €

That's ~756 €/year in savings — paid back in ~8 years.

Over 25 years, you gain

~12 862 €

Cumulative savings minus your remaining cost · 2 160 kg CO₂ avoided/year.

Indicative estimate (official Klimabonus scale + LU market prices). Amounts to be confirmed by quote and via the Klima-Agence calculator.

Photovoltaic

Self-consumption grant

up to €10,000

An investment grant for a system operated for self-consumption. The amount follows a sliding scale based on capacity; it reaches its cap of €10,000 from 15 kWp onwards.

Formula (below 15 kWp): P × (1,155 − 1,155/35 × P) €
Cap: €10,000 (from 15 kWp)
Minimum capacity: 2 kWp
Condition: self-consumption — waiving the guaranteed feed-in tariff (the surplus can still be sold at the market price)

Storage

Home battery grant

up to €2,250

A complementary grant for a storage battery coupled to the system, so you can use in the evening the electricity produced during the day and raise your self-consumption rate.

Formula (below 9 kWh): Q × (500 − 500/18 × Q) €
Cap: €2,250 (from 9 kWh)
Minimum capacity: 2 kWh

Cash flow

Pre-financing (third-party payer)

€0 upfront

Since 2026, the grant can be deducted directly from the final invoice by an installer listed in the official register: you no longer pay upfront or wait for the State to pay out.

Mechanism: grant amount deducted from the invoice
Condition: installer listed in the Ministry of the Economy register
Beneficiaries: households and cooperatives

The scale in plain terms

What the grant is worth, depending on roof size

A typical residential roof in Luxembourg carries a system of 4 to 12 kWp. The grant follows a sliding scale: expressed in € per kWp, it is more generous on smaller systems.

Amounts calculated with the official formula. To be confirmed via the Klima-Agence simulator; the grant is subject to conditions (self-consumption, installer, etc.).

Capacity	Estimated grant	Grant per kWp
4kWp	4 092 €	1 023 €
6kWp	5 742 €	957 €
8kWp	7 128 €	891 €
10kWp	8 250 €	825 €
12kWp	9 108 €	759 €
15kWp	10 000 €	667 €

A 9 kWh battery adds up to €2 250 to these amounts.

New in 2026

No more fronting the money

With pre-financing, an approved installer deducts the Klimabonus grant directly from your invoice. You pay the net amount — the State reimburses the installer. Your return on investment starts with no cash outlay.

Estimate my grant

Official sources

Verifiable at the source

Amounts and conditions taken exclusively from the Luxembourg State portals and the Klima-Agence. No commercial sources.

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