Marstek Synergrid-approved: which Venus models are on the C10/26 list?
Last updated: 27 September 2026 · Synergrid list status: 21 September 2026 · By Team Multi-Solar, home batteries since 2022, Rotterdam
Yes, Marstek is on the Synergrid list C10/26. It concerns the Venus E (5 kWh, type code MST-BIE5) and the Venus C (2.5 kWh, type code MST-BIE2.5), each in an 800 W and a 2,500 W version, homologated on 8 August 2025 as a plug & play device. Venus A, Venus D, Venus E Mini, Venus Max and Venus X are not on it as of the reference date. Below you can see, per model, exactly what is on the list and what that means for your connection in Belgium.
Which Marstek models are on the list?
| Model | On the list | Since / reference | Note |
|---|---|---|---|
| Venus E, 5 kWh (MST-BIE5-0800), 800 W | Yes | 8 August 2025, GLV265-07-0002 | Plug & play, single-phase, firmware V137 |
| Venus E, 5 kWh (MST-BIE5-2500), 2,500 W | Yes | 8 August 2025, GLV265-07-0004 | Same device on a dedicated circuit |
| Venus C, 2.5 kWh (MST-BIE2.5-0800), 800 W | Yes | 8 August 2025, GLV265-07-0001 | Plug & play, single-phase, firmware V137 |
| Venus C, 2.5 kWh (MST-BIE2.5-2500), 2,500 W | Yes | 8 August 2025, GLV265-07-0003 | Same device on a dedicated circuit |
| Venus A (2.12 kWh per module) | No | – | Not on the list on 21 September 2026 |
| Venus D (2.56 kWh per module) | No | – | Not on the list on 21 September 2026 |
| Venus E Mini (2 kWh) | No | – | Not on the list on 21 September 2026 |
| Venus Max (10 kWh) | No | – | Not on the list on 21 September 2026 |
| Venus X (10 kWh, fixed) | No | – | Not on the list on 21 September 2026 |
Please note: the list states the type code (MST-BIE5), not the generation. That code is printed on the rating plate of the Marstek Venus E 3.0. If you have a different Venus E, check whether the same code is on its rating plate. For the Marstek entries, the list states an external CT meter as the power measurement.
What is a Synergrid approval?
Synergrid is the federation of the Belgian grid operators, including Fluvius, ORES, RESA and Sibelga. It manages technical regulation C10/11, the rules that everything feeding electricity into the Belgian grid must comply with: inverters for solar panels, but also home batteries. Devices that comply with C10/11 are added to list C10/26. That list is updated weekly and is the only place where you can see in black and white whether a model is approved.
Since 17 March 2025, the list has also included plug & play devices, recognisable by the note "Plug&play" in the column with additional information. Since 17 April 2025, these devices may be connected to an electrical installation in Belgium. Synergrid publishes a separate extract of them, the Plug&Play list.
With a plug-in home battery, the inverter is built into the device, so the complete device is on the list with its type code. Always search by the code on the rating plate, not by the brand name alone.
Why do you need this approval in Belgium?
Without a listing on the C10/26 list, a home battery may not be connected to the grid in Belgium. This applies to fixed systems and, since 17 April 2025, also to plug-in home batteries. A grid operator can ask for the reference on the list when you register or during an inspection. If the model is not on it, the operator can refuse the connection.
The approval tests the device's grid behaviour: its response to voltage and frequency, automatic disconnection in the event of a fault, and power limiting. The list says nothing about capacity or cell quality.
This list does not apply in the Netherlands. There, it is about registering with your grid operator and the 800 W limit for the socket. You can read how that works in our article on the 800 W rule for plug-in home batteries.
What does this mean for registering with your grid operator?
You register an approved device with your own grid operator: Fluvius in Flanders, ORES or RESA in Wallonia, Sibelga in Brussels. You provide the brand, the type code and the power. Because the Venus E and Venus C are on the list, the grid operator can find the reference (GLV265-07-000x) straight away.
The registration procedure and the power limits differ per region. Synergrid refers to the website of the relevant grid operator for this. So check in advance which procedure applies to your address. If you want to use the 2,500 W version, an installer connects the battery to a dedicated circuit in the electrical panel; you register that as well.
Since 15 October 2025, for small generation installations, the P1 port of the digital meter may also be used for power management alongside the external measuring sensor (amendment 2.3 to C10/11). You can read which measurement your battery needs and how to connect it in our article on the P1 smart meter dongle (P1-meter) or CT clamp.
What if your Marstek model is not on the list?
The Marstek Venus A, the Venus D, the Venus E Mini, the Venus Max and the Venus X are not on the C10/26 list as of the reference date. For a Belgian address, that means: do not connect them to the grid for the time being. Manufacturers apply for homologation per model, and Synergrid adds to the list weekly. So it may change, but do not count on it until the model is actually on the list.
If you want to install a Marstek in Belgium, choose the Venus E. If you want a modular system that is approved, take a look at the HYXi HALO, which has been on the list with all its expansions since July 2026. If you live in the Netherlands, the list plays no role and you can choose from the entire Marstek range.
Which Marstek suits your situation?
You live in Belgium and want a plug-in home battery that you connect yourself. Choose the Venus E in the 800 W version. It is on the list, plugs into an earthed socket and is in use the same day. Register it with your grid operator.
You live in Belgium and want more than 800 W. That is also possible with the Venus E: on a dedicated circuit it delivers and charges at 2,500 W. That version is listed separately (MST-BIE5-2500). An installer fits the circuit; we arrange installation via a quote.
You live in Belgium and want to start small with a modular system. The Venus A and Venus D are not on the list. In that case, look at the HYXi HALO or start with one Venus E and add a second one later.
You live in the Netherlands. The Synergrid list does not apply. Choose based on capacity, power and expandability; our article plug-in or fixed helps you with that.
Not sure? Request a no-obligation quote and we will look at your address, your connection and the model that suits it. All plug & play batteries that are Synergrid-approved are marked as such on the product page.
Frequently asked questions
Is the Marstek Venus E 3.0 Synergrid-approved?
The list includes the Venus E with type code MST-BIE5 in an 800 W and a 2,500 W version, approved on 8 August 2025. The Venus E 3.0 carries that type code. Check the rating plate of your own device to be sure.
Is the Marstek Venus A on the Synergrid list?
No. On 21 September 2026, the Venus A is not on the C10/26 list, nor are the Venus D, Venus E Mini, Venus Max and Venus X. For a Belgian address, we therefore do not currently recommend these models.
Can I link two Venus E batteries in Belgium?
The homologation applies per device. Every Venus E you install falls under the same reference. Whether you may register several devices on your connection, and up to what total power, is determined by your grid operator per region.
Where can I find the Synergrid list itself?
On synergrid.be under Homologation, Electricity, Decentralised generation units. There you will find the full list C10/26 (Excel) and the Plug&Play extract (pdf). Synergrid recommends always consulting the online version, because the list changes weekly.
Sources
- Synergrid, List C10/26 of homologated decentralised generation units (Excel), last updated 21 September 2026, consulted 27 September 2026
- Synergrid, Plug&Play list, extract from C10/26, edition 18 August 2026 (pdf via the same page)
- Synergrid, technical regulation C10/11, amendment 2.2 (in force 17 April 2025) and amendment 2.3 (15 October 2025), summarised in the key data of the Plug&Play list
- Marstek, Venus E 3.0 user manual (type code BIE5), May 2025