6 % VAT solar panels in Belgium: savings and conditions
In Belgium, installing solar panels on a home more than 10 years old is subject to the reduced VAT rate of 6 % instead of 21 %. This difference represents up to 1 890 € of immediate savings on a standard installation. We check your eligibility and apply it automatically on your quote.
Indicative 2026 amounts · eligibility verified during the technical visit.
VAT savings by photovoltaic installation size
Comparison of the savings by installation size when applying the reduced VAT rate of 6 % instead of 21 %. Prices are indicative and correspond to a complete installation (panels, inverter, structure and connection).
| Installed capacity | Price excl. VAT VAT calculation base | 6 % VAT saving vs standard 21 % rate | Price incl. 6 % VAT final reduced amount |
|---|---|---|---|
| 3 kWp (7 panels)Small home or addition to an existing system | ≋ 3 530 € | − 530 € | ≋ 4 060 € incl. VAT |
| 6 kWp (14 panels)Standard family home | ≋ 7 060 € | − 1 060 € | ≋ 8 120 € incl. VAT |
| 9 kWp (21 panels)Large house or high consumption | ≋ 10 590 € | − 1 590 € | ≋ 12 180 € incl. VAT |
Indicative 2026 amounts excluding options (battery, monitoring). The exact saving is calculated on the free quote. See also: solar price & installation, all grants.
What determines your right to 6 % VAT
The reduced 6 % VAT rate on solar panels is not automatic: several cumulative conditions must be met to benefit from it. We check each criterion during the free technical visit.
- Age of the home (more than 10 years)
This is the main condition: the home must have been occupied for private purposes for at least 10 years. The year of construction appears on the cadastral file; our installer verifies this point before invoicing.
- Private residential use
The installation must be carried out in a home used for private purposes — primary or secondary residence. Buy-to-let buildings or those with mixed professional use are excluded from the reduced VAT benefit.
- Client declaration on the invoice
The beneficiary must declare in writing on the invoice that the conditions are met (home > 10 years, private use). wendows includes this statement from the quote stage: you sign once, we handle the rest.
- Registered installer subject to VAT
Only a contractor subject to VAT and acting within their business activity can apply the reduced rate. Self-build (DIY) installations or work by a non-taxable third party are not eligible.
- Panels integrated into the structure or roof-mounted
The reduced rate covers the photovoltaic panels, the inverter, the mounting structure and the electrical connection. Battery storage integrated in the same invoice can also benefit from the reduced rate under certain conditions.
See the cost with a battery → - Renovation works (not new build)
6 % VAT applies in renovation, not on new builds. For a new building (less than 2 years old or with a recent first occupancy), the standard 21 % rate applies in full.
6 % VAT + green certificates: the double advantage
The reduced VAT is combinable with the other regional support mechanisms. Combined with green certificates or Renolution grants, it significantly amplifies the return on investment of your solar installation.
6 % VAT + CWaPE green certificates
In Wallonia, 6 % VAT applies from the invoice, then CWaPE green certificates generate an annual revenue for 5 years. On an 8 200 € installation, the immediate VAT saving (≋ 1 230 €) adds to the green certificates over 5 years (≋ 11 000 €), making the installation self-financing.
- 6 % VAT deducted automatically on the invoice
- CWaPE green certificates received annually over 5 years
- CWaPE declaration after commissioning
6 % VAT + Brugel green certificates + Renolution grant
In Brussels, the three mechanisms combine: 6 % VAT (immediate), Brugel green certificates over 10 years and a Renolution grant that varies with your income. The Renolution application must be submitted before the works; wendows handles it.
- 6 % VAT applied from invoicing
- Renolution application submitted before the works start
- Brugel green certificates declared within 12 months of commissioning
6 % VAT + prosumer tariff + Mijn VerbouwPremie
In Flanders, 6 % VAT remains the only guaranteed national advantage. Green certificates have been abolished; the prosumer tariff applies to injection. The Mijn VerbouwPremie grant, subject to income conditions, can cover part of the cost.
- 6 % VAT applicable as soon as the home is more than 10 years old
- Registration with Fluvius before commissioning
- Mijn VerbouwPremie via the Flemish regional desk
Your VAT saving calculated and applied in 48 h
We check your eligibility, apply the reduced rate on the invoice and prepare all the complementary grant applications: you receive your final price right away.
- We check your eligibility
Age of the home, residential use, configurations: we verify each required condition for applying the reduced rate during the technical visit.
- We size and price at 6 % VAT
The quote includes 6 % VAT from the outset, the client declaration and the complementary grants (green certificates, Renolution grant). You see the real net cost.
- We prepare the grant applications
CWaPE in Wallonia, Renolution in Brussels, Fluvius in Flanders: we handle the paperwork entirely, including submission deadlines.
- We install and certify
Our certified installers ensure the regulatory compliance required to apply the reduced rate and obtain all the grants.
The savings shown are 2026 benchmarks. The exact eligibility is verified during the technical visit. Request your free quote for a precise VAT + grants calculation.
Estimate your VAT saving in 10 seconds
Choose the size of your installation to see the immediate saving linked to the reduced VAT. The difference between 6 % and 21 % is taken directly off your invoice.
Indicative estimate based on ≋ 305 € excl. VAT per 425 Wp panel. The exact amount appears on your personalised quote.
6 kWp installation: breakdown of the VAT saving
A concrete case to illustrate the saving achieved thanks to 6 % VAT on a standard installation in renovation — your project will be priced based on your situation.
Indicative 2026 example excluding battery. 6 % VAT adds to the green certificates; the net cost can be much lower after 5 years of support. Request your quote for a calculation tailored to your situation.
Everything to know before your solar installation
- Solar price & installation Total project cost
Complete price ranges by installed capacity, equipment and labour in Belgium.
See prices → - All solar grants 2026 Green certificates & grants
Green certificates, Renolution grants, prosumer tariff: all the regional mechanisms combined with 6 % VAT.
See grants → - Yield & production Maximise self-consumption
Orientation, tilt, shading: the factors that determine the real production of your installation.
See the yield guide →
Your questions about reduced VAT on solar panels
What are the conditions to benefit from 6 % VAT on solar panels?
Three cumulative conditions: (1) the home must have been occupied for private purposes for at least 10 years; (2) the works must be carried out by a contractor subject to VAT; (3) the beneficiary must declare on the invoice that the conditions are met. wendows verifies these points and includes the statement from the quote stage.
How much can I save with 6 % VAT on my solar installation?
The saving corresponds to 15 VAT points (21 % − 6 %) applied to the price excl. VAT of the installation. For a 7 060 € installation excl. VAT (6 kWp), that represents about 1 059 € of immediate saving on the VAT-inclusive invoice.
Does 6 % VAT also apply to the storage battery?
Yes, under conditions. If the battery is installed at the same time as the panels and appears on the same invoice, it can benefit from the reduced 6 % rate, provided the overall installation meets the same criteria (home > 10 years, private use). A battery installation added later may be treated differently depending on the circumstances.
Is 6 % VAT combinable with green certificates?
Yes, absolutely. The reduced VAT is an immediate fiscal advantage on the invoice, independent of the regional support mechanisms (CWaPE green certificates in Wallonia, Brugel in Brussels, Renolution grants). These two advantages combine and can very significantly reduce the net cost of your installation.
What happens if my home is less than 10 years old?
If the home is less than 10 years old, 21 % VAT applies in full. There is no exemption for this criterion. However, green certificates and regional grants remain accessible regardless of the age of the home, under their own conditions.
How does wendows apply 6 % VAT on the invoice?
During the technical visit, our advisers verify eligibility (year of construction, use). The quote states the applicable rate from the outset. The invoice includes the client declaration required by Belgian VAT legislation. You have no additional steps to take.
6 % VAT applied, grants calculated: your real net price
We check your VAT eligibility, prepare the grant applications and deliver a quote with the final net cost: reduced VAT + regional grants deducted. Free and with no commitment.
- 6 % VAT verified and applied by default
- Green certificates + grants combined in the quote
- Qualiwatt-certified & accredited installers