Budget & financing
Solar panel prices in Belgium in 2026
A 4 to 6 kWp system installed for €4,000 to €7,500 excl. VAT: what the quote should include, 6% or 21% VAT, aid by region and the common mistakes to avoid.
By the Batizzy teamPublished Updated 4 min read
For a residential system of 4 to 6 kWp fitted on the roof, expect €4,000 to €7,500 excluding VAT in Belgium. Two quotes for the same capacity can still be far apart, and the reason is almost always the same: they don't count the same items. One includes bringing the fuse board up to standard and the scaffolding, the other will add them later as extras. Compare what is in the quotes before you compare the totals.
Price ranges in 2026
For a standard residential system of 4 to 6 kWp, expect €4,000 to €7,500 excluding VAT, installation included. That bracket covers a complete rooftop system: panels, inverter, mounting structure, cabling and labour.
What a serious quote should normally include:
- the panels and their manufacturer's warranty
- the inverter or micro-inverters
- the mounting structure and the sealing of anchor points
- the cabling to the fuse board
- commissioning and the paperwork with the grid operator
What is rarely included, and worth checking line by line: a home battery, upgrading the fuse board, the inspection of the installation, or any reinforcement of the roof structure.
What makes the price vary
For the same capacity, several factors explain the gaps between quotes:
- The roof itself. A simple, well-oriented tiled roof is quick to fit. Slates, a ballasted flat roof, significant height or difficult access: labour goes up.
- The equipment. High-end or entry-level panels, a central inverter or micro-inverters: equipment quality affects both price and lifespan.
- The battery. Storing your output raises self-consumption, but it is a substantial extra budget. It mostly makes sense if your consumption profile suits it.
- The state of your electrical installation. An ageing fuse board may need upgrading before connection.
- Your region. Compensation rules differ between regions (prosumer tariff, digital meter) and influence the optimal sizing.
Worked examples
Let's take the reference bracket for an installed 4 to 6 kWp system:
| Scenario | Budget |
|---|---|
| Installed system, excl. VAT | €4,000 to €7,500 |
| Incl. 6% VAT (home over 10 years old) | €4,240 to €7,950 |
| Incl. 21% VAT (more recent home) | €4,840 to €9,075 |
The reduced VAT rate takes several hundred euros off the bill. It is the first thing to check on your quote: the rate applied must match the age of your home.
VAT and aid
The general rule in Belgium: work supplied and invoiced by a contractor in a private home over 10 years old qualifies for 6% VAT instead of 21%, if the invoice carries the legal wording for the reduced rate. The full details are in our article on 6% VAT in Belgium.
For aid, everything depends on your region:
- Flanders: Mijn VerbouwPremie mainly targets insulation, windows and systems such as heat pumps. For solar panels, check the official Flemish portals.
- Brussels: the Housing Fund's Ecoreno loan can finance a solar installation, and Homegrade lists green certificates among the aid to claim after the work. No Renolution grant is open for work invoiced in 2025 or 2026. See our update on Brussels support.
- Wallonia: Rénopack, which replaced the grants on 1 October 2026, finances work that gains the home a PEB label. Solar panels are not on the list of financeable work published by the SWCS. See our article on the end of the Prime Habitation.
Either way, check your region's official portal before you sign: conditions change from one year to the next.
Mistakes to avoid
- Comparing quotes of different capacity. Always bring the comparison back to the price per installed kWp, VAT included.
- Signing without a site visit. A quote drawn up without anyone seeing the roof or the fuse board almost always ends in extras.
- Forgetting the side items. Inspection, fuse board upgrade, scaffolding: ask in writing what is included.
- Rushing into a battery. It can wait for a second phase if your budget is tight; the system remains expandable.
- Not vetting the pro. Active CBE number, customer reviews, warranties: a serious pro has nothing to hide.
FAQ
How much does a solar panel installation cost in 2026?
For an installed residential system of 4 to 6 kWp, the observed bracket runs from €4,000 to €7,500 excluding VAT. The final price depends on the roof, the equipment chosen and options such as a battery.
Which VAT rate applies to solar panels?
6% if the installation is supplied and invoiced by a contractor on a private home over 10 years old, 21% otherwise. The rate must appear clearly on the quote.
Are solar panels still worth it in Belgium?
In most cases, yes: your electricity bill drops from commissioning, and the power you use yourself no longer has to be bought. The exact payback depends on your consumption profile and your region's compensation rules: run the simulation before you sign.
Get your project priced
Post your solar project on Batizzy. Installers in your area ask their questions through the messages, then send their quote, which you compare side by side, item by item.