Consuel + triphasé 3 × MultiPlus-II 5000 : retours d'expérience et certificats

Been going through something similar lately with my three-phase setup and the paperwork headache that comes with it, so this thread feels timely.

I've got three Victron MultiPlus-II 5000s running in a three-phase configuration out here, and getting the whole thing signed off was genuinely one of the more painful parts of the project. The technical side — wiring, commissioning, VE.Bus configuration — was actually the straightforward bit. It's the certification documentation where things got murky.

The specific sticking point for me was proving anti-islanding compliance to my DNO in a way they'd actually accept. Victron's own documentation is thorough, but translating it into the format the network operator wanted was a different story entirely. Ended up spending a fair few evenings cross-referencing G98/G99 requirements and pulling together a supplementary technical pack just to satisfy them.

A few things that helped:

• The VEConfigure export showing the relay assistant settings
• A written statement confirming the units were pre-certified to EN 50549-1
• Victron's official product compliance documents from their website (the ones buried three pages deep)

Still not entirely sure I did it the "right" way, or just the way that happened to work for my particular inspector.

Curious whether anyone else here has gone through a multi-inverter three-phase sign-off — especially whether your DNO asked for anything unusual, or whether you found a cleaner route through the paperwork. Would love to compare notes rather than everyone reinventing the wheel independently.

@HarbourKev three MultiPlus-IIs and French paperwork — you've basically built yourself a second full-time job there, mate. 🏗️

@HarbourKev three MultiPlus-IIs and Consuel? Mate, at that point you're not off-grid, you're off your head 😄

Jokes aside — the three-phase certification paperwork in France is genuinely its own beast. Each inverter needs its own documentation stack, and Consuel want everything cross-referenced

@HarbourKev genuinely curious what size CT clamps you're running on the grid-tie side — with three MultiPlus-II 5000s in three-phase you're potentially pushing serious current imbalance scenarios if one phase trips, and Consuel inspectors over here seem increasingly clued-up about that.

From my garden office setup (single phase, much simpler life), the paperwork with Victron kit is actually pretty solid once you've got the VE.Bus configuration certificates printed from VictronConnect — those helped enormously when my DNO came sniffing around.

For the three-phase Consuel specifically, the CCTP document listing your protection settings is apparently what they want to see first. Did your installer pre-populate the ESS assistant relay trip thresholds? That's usually where French inspectors focus — grid disconnect response times under the French Décret 2008-386 requirements rather than G98/G99 that we'd normally reference in the UK.

@HarbourKev the shepherd's hut I power runs a single MultiPlus-II 3000 and even that single-phase setup had me drowning in G98 notifications and DNO correspondence for months — I genuinely can't imagine navigating Consuel paperwork on top of three-phase across the Channel.

What I will say is that the VE.Bus three-phase config in VictronConnect is surprisingly solid once you've got your master/slave assignments right. Getting the phase synchronisation dialled before you even think about presenting documentation to any authority saved me a lot of grief on a smaller scale.

On @AndyRobinson's CT clamp question — worth specifying whether you're using the EM24 or going third-party, because Consuel inspectors apparently vary wildly on what metering evidence they'll accept. The EM24 with proper Modbus logging at least gives you a paper trail that looks official.