Synergrid C10/26 list: is my inverter on the list – and what if it is not?

Short answer: the Synergrid C10/26 list is the Belgian register of inverters, hybrid inverters and battery systems homologated under the technical prescription C10/11. As a rule, the grid operators (Fluvius, ORES, RESA, Sibelga) accept only listed devices at registration – in the listed firmware version. If a device is not listed, it needs an individual proof of conformity against C10/11; whether that is sufficient is for the responsible grid operator to decide. To find out whether your device is on it, use the free Synergrid C10/26 check by PlanElec, which works from a dated copy of the official list.

What is the Synergrid C10/26 list?

Synergrid is the federation of Belgian electricity and gas grid operators. The prescription C10/11 defines the technical requirements that decentralised generation units (PV inverters, home batteries, CHP, wind) must meet on the low-voltage grid: protection functions during grid disturbances, frequency and voltage behaviour, power control.

The C10/26 list is its practical result: manufacturers have their devices tested against C10/11, and approved device types are published with reference number, firmware version and technical data. Synergrid keeps the list up to date as an Excel file; the current edition refers to C10/11 edition 2.4 (15/10/2025). It covers several thousand active devices; the check shows the exact count and the date of the imported data right above the results table.

Why the list matters for registration and inspection

For residential PV systems up to 10 kVA, AREI Chapter 7.112 also applies to the electrical installation itself – both must be right. The guide PV system in the single-line diagram shows what the diagram looks like.

How to read a list entry

Each row describes one combination of model and firmware. The key columns:

Why the firmware version counts

The protection functions under C10/11 are software. A device running a firmware other than the listed one counts as not homologated at registration – even if the model itself is on the list. Read the firmware on the device or in the manufacturer's app and compare it with the list entry.

Interpreting restrictions correctly

Plug-in solar and plug-in batteries: the same list

Micro-inverters and plug-in batteries up to 800 W – Marstek, Zendure, Anker Solix, HomeWizard or Hoymiles, for instance – also need an entry on the C10/26 list, usually with the restriction "only in module < 800 W". A device sold in Germany or the Netherlands is not automatically admitted in Belgium: the Belgian grid protection settings under C10/11 differ, and the manufacturer must have the Belgian variant homologated separately. So check before buying whether your exact model is listed. Even a listed plug-in device is registered with the grid operator, and the electrical installation itself remains subject to the AREI. If you are specifically after a battery, use the Synergrid C10/26 check for home batteries: the same list, focused on batteries and hybrid inverters.

Common mistakes in practice

1. Model checked without its suffix – SUN2000-8KTL-M0 and SUN2000-8KTL-M1 are different entries.
2. Firmware not compared – the device is listed but installed with an older version.
3. Expired homologation overlooked – Synergrid withdraws entries; the device then appears under "expired".
4. Imported from abroad – same name, different country variant without Belgian homologation.
5. Battery forgotten – the battery inverter needs a list entry too, not only the PV inverter. See Home battery and AREI.

Check a device right in your browser

The Synergrid C10/26 check loads a dated copy of the official list and makes it searchable:

1. Type the brand – suggestions show how many models are listed per brand.
2. Refine the model – keep typing until the exact model appears; expired entries are flagged.
3. Read the result – the table shows firmware, Smax, Pac, phases, application, restrictions and the Synergrid reference; you sort and filter by phases, segment and status.
4. No match? – the check suggests technically comparable homologated devices of the same power class.

Filters and sorting live in the URL. Send the link straight to a customer or colleague and they see exactly the same selection.

What the check does – and what the official list does

The check is your fast way into the list; the authoritative statement remains the current official list on synergrid.be. In case of discrepancy the official list prevails. The electrical installation itself – protection, RCD, cable size, isolator – is outside the check; for that, PlanElec has the AREI/RGIE self-check on the single-line diagram.

A defensible device check, step by step

Start from the label on the device that will actually be installed, not from a webshop title. Record manufacturer, complete model suffix, product reference, rated apparent power and firmware. Hybrid families often contain several power variants, regional variants or firmware branches. A search result that matches only the brand or the first part of the name is not enough.

Open the current Synergrid homologation page and the official list linked there. Match the row field by field. Read restrictions and notes, including permitted modes, external protection, export limitation, storage use or combinations with other components. For plug-and-play equipment, use Synergrid's dedicated Plug & Play information and the exact list entry; a normal decentralised-production entry does not automatically cover every plug-in configuration.

Save evidence with the project: the row or official reference, list date, firmware seen on site and the date you checked. Recheck before commissioning and notification, because the intended device, firmware or official data can change between quotation and installation. If the row is absent, you clarify the Belgian homologation with the manufacturer or importer and ask the relevant network operator which evidence it accepts. PlanElec's search is your reading aid; the attestation comes from the official source.

Keep three decisions separate. C10/26 type homologation addresses the network-interface characteristics of the product. The approved inspection body assesses the electrical installation against the AREI/RGIE. The distribution network operator handles notification and connection conditions. A positive result in one area does not automatically grant the other two.

On the single-line diagram, document the exact inverter and the associated protection, isolation and cable data. Keep the situation plan, manufacturer declarations, commissioning information and inspection report in the installation dossier. See PV system documentation for the complete workflow. This review was performed on 5 October 2026; for a purchase or commissioning decision, always use the live official list.

Similar rows are not interchangeable

Compare electrical variant, firmware range, Smax and notes as well as model text. A screenshot is not lasting evidence: keep the official file name or reference and the check date as well. A system combining inverter, battery and external network protection may need several related entries or proofs. Check every grid-connected function and the permitted combination.

After a firmware update, you reassess the existing documentation. The device working does not prove that this exact software version is covered by the published entry. Likewise, CE marking is not C10/26 homologation: it is a different manufacturer responsibility and replaces neither the list entry nor the installation inspection.

For zero-export configurations, also document the components and settings required by the manufacturer and the network operator. An export limit does not automatically change the classification as a grid-connected unit. Have edge cases clarified in writing before ordering.

Evidence at project handover

Hand over a short check note, not just a link: who compared which official list against which rating plate and which firmware, and when? Which restriction was read, and which component satisfies it? The next person on the project can then recheck in a targeted way before commissioning.

With a replacement device, the check starts again. Similar power or the same brand does not replace the exact reference. An earlier successful registration does not prove that a model installed later is covered either. Update the single-line diagram, equipment documents and registration data together, and have the electrical change assessed according to its actual scope.

A dated delivery note supports the identification when model variants look alike. If delivery note, rating plate and official row do not match, you resolve the contradiction before registration instead of bridging it with an assumption.

Frequently asked questions

Do I have to put the Synergrid reference in the registration? Grid operators primarily ask for brand, model and firmware version. The GLV reference is a useful addition but not always unique per model: Synergrid sometimes assigns the same reference to several models. So state the reference and the model designation.

My device is listed, but the entry is "expired" – what now? The homologation has been withdrawn or has lapsed. For new installations the device is no longer admitted; existing installations are generally unaffected. When in doubt, ask the grid operator.

Does the list also apply in Wallonia and Brussels? Yes. C10/11 and C10/26 are Synergrid prescriptions and apply nationwide to all distribution grid operators.

How often does the list change? Synergrid publishes new editions regularly. The check shows the date of the imported data, so you always know which state your result is based on.

Related articles

• Documenting a PV system in the single-line diagram
• Home battery and AREI
• Electrical inspection in Belgium

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