Solar panels in Belgium: rules and support in 2026

Wallonia: the prosumer tariff

A prosumer is a low-voltage grid user who produces electricity with an installation of 10 kVA at most, and who draws and injects on the same connection (CWaPE, the Walloon energy regulator). The prosumer tariff is not a tax: it is a contribution to grid costs.

Two cases, according to the CWaPE:

• You have a dual-flow or smart meter: grid tariffs apply to the gross electricity drawn. You are not charged on the capacity of your panels.
• You do not have such a meter: a flat-rate tariff in €/kWe applies to the net electrical capacity the installation can deliver.

Injection remains free: the 2025-2029 tariff methodology provides no injection tariff for installations of 10 kVA or less. The prosumer tariff does not take home batteries into account, and these must be reported to the grid operator.

The 2025 amounts (capacity tariff, VAT included, in €/kWe) by grid operator:

The 2026 amounts are in your grid operator’s tariff sheet, published on the CWaPE website. The flat rate is billed by your supplier. The tariff can also concern a tenant: it is billed to the grid user, not necessarily to the owner of the panels.

Wallonia: meter and net metering

• Smart meter: since 1 January 2024, new installations of 10 kVA or less are systematically fitted with a smart meter, unless technically impossible, unreasonably costly or refused.
• End of net metering: the net metering principle ended on 31 December 2023. It is maintained until 31 December 2030 for producers with a renewable installation of 10 kW or less commissioned before 1 January 2024.
• Surplus fed in: by default, the surplus energy fed in is not paid to the producer. The grid operator uses it to offset grid losses (CWaPE).
• Roll-out: the decree of 5 May 2022 provides that, before 31 December 2029, grid operators will have installed smart meters at 80% of prosumers.
• Existing rights: the prosumer tariff changes nothing about the granting of green certificates or of the Qualiwatt grant, which you keep under their own rules.

Our research did not find any official Walloon page announcing a new direct grant for panels in 2026. Check with SPW Énergie (the Walloon public energy service, energie.wallonie.be) and your commune.

Brussels: no prosumer tariff

Brugel, the Brussels regulator, states that a flat-rate charge on panel capacity has not been introduced in Brussels, because installations have a bidirectional meter. In December 2019, it also stated that there is “neither an injection tax, nor a prosumer tax or tariff” and that grid costs are calculated on the electricity drawn. This information dates from 2018 and 2019: check with Brugel and Sibelga what applies to your case.

Brussels: green certificates

Green certificates (GC) are granted for 10 years. According to Homegrade (update of 16 September 2026), the April 2026 rates, fixed for 10 years, are:

Elia buys back GCs at the guaranteed price of €65 per GC, each year in April. Example of a Payotte calculation, based on these two figures: 1 MWh produced gives 2.055 GC, i.e. about €133.6 at the guaranteed price.

What Brussels Environment says (5 November 2025):

• for new installations commissioned from 1 April 2026, the coefficient falls by 11% for 5 to 36 kWp and by 45% for 36 to 100 kWp; there are no more GCs above 100 kWp;
• up to 5 kWp, the coefficient does not change;
• since 1 January 2026, every new installation of 5 kWp or less must have a RESCert PV certificate (“RES certificate”), issued by a certified installer; without it, no GCs. Brugel checks this.

To obtain GCs, you also need an installation compliant with the RGIE (the General Regulations on Electrical Installations), a bidirectional meter fitted by Sibelga and a file submitted to an approved inspection body. Production readings are sent every quarter. Natural persons with less than 10 kVA are generally not subject to VAT on the sale of GCs (Homegrade). Read also renovation grants.

Meter in Brussels

According to Homegrade, the decentralised production certificate requires a bidirectional meter to be fitted by Sibelga. Brugel already wrote in 2018 that installations have had a dual-flow meter since 2007, at no cost to the prosumer. Ask Sibelga for the current procedure.

Do you need planning permission?

• Wallonia: the SPW Territoire table (2021 update) exempts the installation of solar modules that supply the building, subject to conditions on overhang and slope. For example: on a pitched roof, an overhang of 0.30 m at most and a slope difference of 15 degrees at most with the roof; on a flat roof, 1.50 m of vertical overhang and a slope of 35 degrees at most.
• Brussels: the Region lists photovoltaic panels not visible from the public space among the exempt works.

Details in our guide Works: when do you need planning permission?.

Which professional to consult

A photovoltaic installer, RESCert-certified in Brussels for installations of 5 kWp or less. An electrician for RGIE compliance; see also the electrical inspection. Your grid operator (Sibelga, ORES, RESA, etc.) for the meter.