Solar panels are one of the few home improvements that eventually pay for themselves. That only works if you pay the right price to begin with. Across the photovoltaic quotes compared on Batizzy, prices still vary widely between pros for the same capacity, often because the offers do not include the same items. Here are the 2026 reference points to frame your budget before you sign.
Price ranges in 2026
For a typical residential installation of 4 to 6 kWp, expect €4,000 to €7,500 excl VAT, installation included. That range covers a complete rooftop system: panels, inverter, mounting structure, cabling and labour.
What a serious quote should normally include:
- the panels and their manufacturer warranty
- the inverter or micro-inverters
- the mounting structure and the waterproofing of the anchor points
- the cabling to the electrical panel
- commissioning and the paperwork with the grid operator
What is rarely included, and worth checking line by line: the home battery, upgrades to the electrical panel, the inspection of the installation, or any reinforcement of the roof structure.
What drives the price
For the same capacity, several factors explain the gaps between quotes:
- The roof itself. A simple, well-oriented tiled roof is quick to fit. Slate, a flat roof with ballast, significant height or difficult access: labour costs climb.
- The equipment. Premium or entry-level panels, central inverter or micro-inverters: equipment quality affects both the price and the lifespan.
- The battery. Storing your production increases self-consumption, but it adds a substantial extra budget. It mainly makes sense if your consumption profile suits it.
- The state of your electrical installation. An outdated panel sometimes needs upgrading before connection.
- Your region. Compensation rules differ from region to region (prosumer tariff, digital meter) and influence the optimal sizing.
Worked examples
Let us take the reference range for an installed 4 to 6 kWp system:
| Scenario | Budget |
|---|---|
| Installed system, excl VAT | €4,000 to €7,500 |
| Incl VAT at 6% (home over 10 years old) | €4,240 to €7,950 |
| Incl VAT at 21% (more recent home) | €4,840 to €9,075 |
The reduced VAT rate saves several hundred euros. It is the first thing to check on your quote: the rate applied must match the age of your home.
VAT and grants
The rule that applies across Belgium: works on a private home over 10 years old qualify for 6% VAT instead of 21%, provided a BCE-registered contractor carries out the works and the invoice states the conditions of the reduced rate. The full detail is in our article on the 6% VAT rate in Belgium.
For grants, everything depends on your region:
- Brussels: the Region supports photovoltaics and energy renovation, see our guide to the Brussels grants for 2026.
- Wallonia: the grant scheme mainly targets insulation and heating systems, see our guide to the Walloon grants for 2026.
- Flanders: photovoltaics do not, in principle, fall under the Mijn VerbouwPremie counter, which covers insulation and technical systems; check the official Flemish portals.
In every case, keep the reflex: check the official portal of your region before signing, as conditions change from year to year.
Mistakes to avoid
- Comparing quotes for different capacities. Always bring the comparison back to the price per installed kWp, VAT included.
- Signing without a technical visit. A quote drawn up without anyone seeing your roof or your electrical panel almost always ends in extras.
- Forgetting the side items. Inspection, electrical panel 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 installation remains extendable.
- Skipping the background check. Active BCE number, client reviews, warranties: a serious pro has nothing to hide.
FAQ
How much does a solar panel installation cost in 2026?
For a residential installation of 4 to 6 kWp, installed, the observed range is €4,000 to €7,500 excl VAT. The final price depends on your roof, the equipment chosen and options such as a battery.
Which VAT rate applies to solar panels?
6% VAT if a registered contractor installs the system on a private home over 10 years old, 21% otherwise. The rate must appear in black and white on the quote.
Are solar panels still worth it in Belgium?
Yes, in most situations: your electricity bill drops from day one and self-consumption protects you against price rises. The exact payback depends on your consumption profile and your region's compensation rules: run the simulation before you sign.
Get your project priced by verified pros
Post your photovoltaic project on Batizzy and receive several comparable quotes from BCE-verified pros, with a unified format that makes item-by-item comparison easy and secure messaging to ask your technical questions before signing.
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