Belgium's residential PV market is shaped by three radically different regional net-metering schemes operating under one federal grid code. Flanders (Vlaanderen) ended 1:1 net-metering in 2021 with the digital meter rollout — surplus is now paid at a wholesale-linked floor (~5-8 c/kWh) rather than retail. Wallonia operates a capacity-based prosumer tariff with partial netting preserved for installs ≤ 10 kVA. Brussels-Capital retains full annual net-metering up to 5 kVA, the most generous of the three.
Practical effect on payback: for the same 5 kWp install, Brussels-Capital residents see 6-8 year payback (essentially equivalent to Germany), Wallonia 8-10 years, Flanders 9-12 years (longer because more of the generation gets exported at the wholesale floor under typical 60% self-consumption). The economics push Flemish installs heavily toward batteries — 30-40% of new 2024 installs in Flanders include battery storage versus 10-15% in Brussels.
Cost benchmarks: turnkey installer pricing runs €1,300-1,700/kWp for typical 4-7 kWp residential rooftop in 2024-2025. The 6% reduced VAT (active since March 2022, extended through end of 2026) saves 15% versus the standard 21% rate. Battery adds €700-1,000/kWh of usable storage, with payback strongly favoring Flanders installs where the wholesale-floor surplus penalty is biggest.
Permits and grid connection
- Synergrid C10/26 prescription: federal grid code for plug-in PV ≤ 800W (covered separately in balcony PV guide). For full residential installs, C10/11 procedure.
- DSO notification mandatory before commissioning: Fluvius (Flanders), ORES / RESA / AIEG / AIESH (Wallonia), Sibelga (Brussels).
- Stedenbouwkundige vergunning / permis d'urbanisme: rooftop PV generally permit-free in most municipalities under regional building codes; listed buildings need heritage office approval.
- Comunidades de propietarios / mede-eigendom: General Assembly approval required for installations visible from common spaces. Loi sur la copropriété simplified the process for renewables in 2018.
- AREI (Algemeen Reglement Elektrische Installaties) wiring code applies — certified electrician required for grid-tied install + post-install inspection.
Incentives and tariffs
- Federal 6% VAT on residential PV ≤ 10 kWp (FOD Financiën, in force March 2022, extended through end of 2026). Saves 15% versus standard 21%.
- Flanders: digital meter regime since 2021 means new installs settle surplus at ~5-8 c/kWh injection tariff, not retail. No specific Flemish PV subsidy currently active.
- Wallonia tarif prosumer: capacity charge €80-110/kWp/year levied; partial netting preserved for ≤ 10 kVA installs. CWaPE-administered.
- Brussels-Capital: full annual net-metering for ≤ 5 kVA via Sibelga. No additional regional subsidy currently active.
- Local: many communes / gemeentes offer small PV grants (€100-500). Check your municipal duurzaamheid / développement durable page.
FAQ — Belgium
Should I install PV in Flanders given the post-2021 regime?
Still positive economics, but worse than pre-2021. A 5 kWp install at 70% self-consumption pays back in 9-12 years; with battery 7-9 years. The math favors sizing close to your annual consumption rather than maximizing roof coverage.
Why is Brussels-Capital still on full netting?
Sibelga (single Brussels DSO) retained the legacy net-metering scheme for ≤ 5 kVA residential installs as part of the 2018 reform package. The Brussels Region has not signaled phasing it out as of 2024-2025; Vlaamse and Walloon regions did under regional politics.
Do I need landlord consent as a renter?
Yes for any drilling or wall-mount work. Non-invasive railing-clamp balcony PV (covered in our balcony guide) generally falls under jouissance paisible without explicit consent, but residential rooftop PV is owner-only.
How does VAT 6% rate work?
Applied at point of sale by retailer or installer. Material + labor both qualify when the installer is the purchaser/seller of the components. DIY routes still get 6% on equipment but pay 21% on any contracted electrical work.
Live data sourced from Eurostat (residential tariff), PVGIS v5.3 (irradiance), ECB (FX). Editorial regulatory content verified against official sources on 2026-05-04. Detailed balcony-PV regulations for Belgium live on the balcony-solar country guide.