
Installation of Solar Panels in Belgium: Standards, Regulations and Practical Advice
Installing solar panels is a sustainable and economical solution for generating your own electricity in Belgium. However, this project requires compliance with technical standards, regional regulations, and specific administrative requirements. Discover in this article everything you need to know before embarking on your solar adventure.
Why install solar panels in Belgium?
Solar panels help reduce your carbon footprint while lowering your electricity bills. Thanks to financial aid available in the three regions (Flanders, Wallonia, and Brussels-Capital), the initial investment can be quickly recouped. But before you begin, it's essential to understand the applicable standards and regulations.
Technical and Safety Standards
1. IEC Standards
Solar panels must meet strict international standards to ensure their quality and safety. Here are the main standards to know:
- IEC 61215 : For crystalline silicon modules, this standard tests the performance and durability of the panels.
- IEC 61646 : For thin-film modules, it assesses their mechanical stability and efficiency.
- IEC 61730 : This standard concerns the electrical safety of modules, in particular their resistance to fire and electric shock.
These certifications guarantee that solar panels are reliable and comply with international standards.
2. General Regulations for Electrical Installations (RGIE)
The RGIE (Regulation for Electrical and Electronic Equipment) applies to all electrical installations in Belgium, including those related to solar panels. This regulation guarantees the electrical compliance and safety of installations. It is imperative to use a certified professional to ensure compliance with these standards.
Regional regulations
Regulations vary across the three Belgian regions. Here is a summary of the main requirements:
1. In Flanders
- Building permit : Generally, no permit is required for small installations on existing roofs. However, some municipalities may have specific rules, so it's recommended to check with your local government.
- Visual impact : The panels must not degrade the aesthetic appearance of the building.
2. In Wallonia
- Planning permission : No permit is required for rooftop installations if they do not extend beyond the building. However, a permit is required for ground-mounted installations.
- Financial aid : Wallonia offers attractive bonuses to encourage the installation of solar panels.
3. In Brussels-Capital
- Visibility from public spaces : No permit is required if the panels are not visible from public spaces and are integrated into the roof.
- Spontaneous declaration : A declaration of work must be made to the Land Registry Administration before the start of work.

Other Requirements Not to Be Overlooked
1. Connection to the Electricity Network
To inject the electricity produced by your panels into the public network, a connection authorization is required. This process is generally handled by the installer or the local network manager (e.g.: Fluvius , Sibelga , RESA ).
2. Respect for Neighborhood Rules
It's important to consider the visual impact of your installation on neighboring properties. For example, avoid having your panels cast unwanted shadows on adjacent buildings. Talking to your neighbors can be helpful in preventing conflict.

Indicative Price List for the Installation of Solar Panels
Although costs may vary depending on the size of the facility, region, and available funding, here is a rough estimate:
Installation type | Average Price (incl. VAT) | Possible grants |
---|---|---|
Installation standard (3 kWc) | €6,000 – €9,000 | Up to €3,000 (Wallonia) |
Average installation (6 kWc) | €10,000 – €15,000 | Up to €5,000 (Flanders) |
Large installation (10 kWc) | €15,000 – €25,000 | Investment bonus (Brussels) |
Note : These prices include panels, inverters, installation, and administrative procedures. Grants vary by region and eligibility requirements.
Frequently Asked Questions (FAQ)
1. How long does it take to pay for a solar installation?
The payback period varies between 6 and 10 years, depending on the region, financial aid and electricity consumption.
2. Do I need to apply for a permit to install solar panels?
This depends on your region and the size of the installation. Check local regulations or contact your municipal administration for more details.
3. What is the lifespan of a solar installation?
Solar panels have an average lifespan of 25 to 30 years, with a performance guarantee often exceeding 80% after 25 years.
Conclusion
Installing solar panels in Belgium is an environmentally friendly and cost-effective approach that requires compliance with specific technical standards and regulations. By taking into account regional specificities and available funding, you can maximize the benefits of your project while contributing to the energy transition.
If you are considering installing solar panels, take the time to do your research and consult a certified professional to ensure the compliance and safety of your installation.