Plugin solar in Belgium

Yes. Plug-in solar kits have been legal in Belgium since 17 April 2025, as long as the inverter (or the kit it is built into) is on Synergrid's official C10/26 plug-and-play list. You plug the kit into a normal wall socket yourself. No electrician and no electrical inspection are needed. There is no national power cap, but the regions recommend keeping the inverter below 800 W. What you do next depends on where you live. In Flanders, kits under 800 W need no registration if you have a digital meter. In Wallonia and Brussels, you must declare every kit to your grid operator. Surplus power can flow to the grid and is paid at your supplier's injection rate.

Plug-in devices are allowed through a change to Synergrid's technical prescription C10/11. Synergrid is the federation of Belgian grid operators. Edition 2.3 of C10/11 was published on 17 October 2024 and removed the rule that generators must have a fixed connection. Since 17 April 2025, devices on Synergrid's C10/26 list may be connected to a home installation by plug.

The three regional energy regulators back the change: VREG (Flanders), CWaPE (Wallonia) and Brugel (Brussels). CWaPE set out the Walloon rules in its communication CD-25d17-CWaPE-0078 of 17 April 2025.

Electrical safety is federal. It is governed by the RGIE/AREI (the general regulation on electrical installations) and by product safety rules enforced by SPF Economy, including the CE mark. Under the RGIE, a plug-in device counts as a stand-alone appliance, so no inspection is needed. If you change your wiring to fit one, the normal inspection rules apply.

Planning rules are regional. In Flanders, plug-in panels need no permit except on protected heritage. In Wallonia, they are generally exempt, but check local rules. In Brussels, your municipality may require a permit depending on where the panels go. This page is guidance, not legal advice.

Check Synergrid's C10/26 list before you buy: only the inverter must be listed, not the panels. A battery's inverter must also be listed. If an inverter comes in both a fixed and a plug-in version, the plug-in version must be listed separately. If you buy a kit abroad, the same listing rule applies.

Registration depends on your region:

• Flanders (Fluvius): under 800 W with a digital meter, no registration; Fluvius detects the kit and asks you to confirm it in Mijn Fluvius. Under 800 W with an analogue meter, register within 30 days and Fluvius installs a digital meter. 800 W or more in total, always register within 30 days.
• Wallonia (ORES, RESA, AIEG, AIESH, REW): every kit must be declared using the simplified UP10 form for systems up to 10 kVA.
• Brussels (Sibelga): every kit must be declared within 30 days. A smart meter is required.

Flanders: log in to Mijn Fluvius. If Fluvius detects injection, confirm the details there. Confirming also helps your supplier pay you for the power you feed in. If you still have an analogue meter, register the kit and Fluvius will schedule a digital meter.

Wallonia: send the UP10 notification to your grid operator. A communicating meter is fitted free of charge. Your current supplier buys your surplus unless you sign an injection contract with another one. If your existing solar system still has net metering (installed before 2024), adding a kit of up to 1 kW does not make you lose it.

Brussels: make sure you have a smart meter, then declare the kit on sibelga.be within 30 days. Late declaration costs a fee.

Everywhere: tell your home insurer. If you rent or live in a co-owned building, get the landlord's or co-owners' agreement first.

None currently. No Belgian region offers a subsidy for solar panels, and in Brussels plug-in kits don't qualify for green certificates. A kit you buy and install yourself carries the standard 21% VAT. The reduced 6% rate applies only when a contractor supplies and installs the system in a private home more than 10 years old. Some municipalities run their own small premiums, so check with your local council.