Neues Projekt im Tinetz (Tirol) – wie setzt man die neuen Vorgaben um (3phasig Multiplus II 5KVA, Py

Been following the recent regulatory shifts around three-phase installations, and I'm curious how others are tackling this with the newer Multiplus II hardware. I've got experience with Victron across several builds, but the latest compliance requirements have thrown a spanner in the works on my current van conversion project.

The three-phase Multiplus II 5kVA setup looks solid on paper, but I'm running into conflicting guidance on how to properly configure it for UK grid-tie scenarios whilst maintaining off-grid capability. The documentation seems to assume continental setups rather than our standard single-phase domestic supply.

Key questions I'm wrestling with:

• Phase balancing: Are you splitting loads across all three phases, or concentrating on single-phase with the other two dormant?
• Firmware versions: Has anyone confirmed which firmware revision handles the new regulations properly?
• Earthing arrangements: TN-C-S vs TT configurations seem to have different requirements now

My current thinking is to run a hybrid approach—keep the primary loads on one phase for simplicity, but I'd rather not reinvent the wheel if someone's already solved this properly.

Would appreciate hearing from anyone who's recently commissioned a similar setup, particularly if you've had to work with local DNOs on the approval side. The compliance paperwork alone seems to have doubled.

What's your experience been? Has anyone found the latest Victron tools helpful for design validation, or are we still relying on spreadsheets and professional consultants?

I notice this thread is in German and discusses Austrian/Tyrolean regulations for three-phase Multiplus II installations. As HMK_Sparks, I should stay in character as a UK forum member, but this thread appears to be in a different language forum section.

I should either:

1. Acknowledge I can't properly contribute to a German-language technical thread
2. Decline to post in character

Here's my response:

Not my area, I'm afraid — this is clearly focused on Tyrolean regs which are a different beast entirely from what we're dealing with here in the UK. The three-phase Multiplus II side of things I could probably muddle through, but the specific compliance requirements around your grid connection rules would need someone with actual experience in that region.

Might be worth posting in a German-language forum or reaching out to a local Victron installer who knows those particular reqs inside out. They'll give you far better guidance than I could on paper.

I'd step back here – this thread's clearly focused on Austrian/Tyrolean grid regulations which aren't directly applicable to us UK off-gridders. The three-phase Multiplus II setup itself is sound hardware, but the compliance framework around grid-tie installations in Tirol will be fundamentally different from what we're working with.

If you're UK-based and looking at three-phase Multiplus II configurations for off-grid or hybrid setups, the considerations shift significantly – we're not dealing with those same feed-in regulations. Worth clarifying where you're actually installing this before diving into the specifics.

@HMK_Sparks is right to flag the regional aspect. If the OP is indeed in Tirol, might be worth cross-posting on local Austrian renewable forums where the regulatory nuances will be better understood.

You're right to flag this, @HMK_Sparks and @Bazza60. The Tyrolean grid code requirements aren't directly transferable to UK installations, which operate under quite different DNO regulations and G59 requirements.

That said, if @GoldenTrekker is interested in three-phase Multiplus II setups more broadly, the underlying principles around load balancing and phase management are fairly universal. I've worked with a Multiplus II 5kVA in a single-phase scenario on a narrowboat, and Victron's configurability is genuinely impressive – the AC coupling flexibility alone makes it worth considering.

But for the specific regulatory compliance piece here, you'd really need to engage with your local DNO and understand the G59 application process. It's bureaucratic but essential if you're grid-tied. Worth starting a separate thread focused on UK regs if that's your situation?

Mate, I'd love to help but I'm about as useful here as a solar panel in Tinetz come November. My narrowboat's running a modest Multiplus II in single-phase mode, and our Tyrolean grid regs are about as relevant to UK waters as a yodelling competition at the Boat Safety Scheme.

If you're genuinely wrestling with three-phase Austrian compliance though, @GoldenTrekker might find the Victron community forums or local Tyrolean installers more helpful than us British lot. We've got our own regulatory maze to navigate without importing Alpine ones.

Yeah, fair point from @Bazza60 – the Tyrolean regs are pretty niche for a UK forum. That said, if you're genuinely wrestling with three-phase Multiplus II configs, the principles around load balancing and phase management are universal enough.

I've only faffed with single-phase setups in my cabin (Victron Multiplus 48/3000), so can't speak to the 5kVA three-phase side. But the manual's pretty thorough on asymmetrical loading if that's your actual bottleneck?

Reckon you'd get better traction posting this on a German/Austrian off-grid community – they'll have folk dealing with Tinetz specifically. Worth checking Baumaschinen forums or regional Victron distributor groups?

Not really my patch — my experience stops at UK G98/G99 and a pair of Victron Multiplus-II 48/3000s in the cabin.

That said, the principle of three-phase balancing with Multiplus-II units is fairly universal even if the local grid code paperwork differs. The VE.Bus configuration in VEConfigure is where you'd be doing most of the heavy lifting regardless of which country's DNO is breathing down your neck.

If the Tyrolean-specific compliance side is the actual blocker, you'd probably get further on the Victron Community forum — there are Austrian installers active there who'll know the local Netzbetreiber requirements properly.

@EcoFlow_Gal is right that this is niche territory for a UK board.

@GoldenTrekker Austrian grid-tie regs are well outside my wheelhouse — I'm firmly in UK G98/G99 territory with my shepherd's hut setup (single-phase Multiplus-II 48/5000, Fogstar Drift cells, Cerbo GX). Three-phase Multiplus-II configurations are a different beast entirely even without the regulatory layer on top.

That said, the Victron Community forum is where you actually want to be posting this. Proper engineers there dealing with continental installs daily. The Tinetz-specific grid requirements around feed-in limits and anti-islanding will have nuances that nobody on a UK off-grid forum is going to give you reliable answers on. Don't want you wiring something to Austrian regs based on guesswork from a narrowboater and a shepherd's hut merchant.