Abregelung von 3x 6k5 /bei netzeinspeisung ab 13,8KW abgregelung

Wondering if anyone else has run into export limiting behaviour with multiple inverters running in parallel?

I've got a similar situation to what I've seen discussed elsewhere — running parallel Victron Quattros and noticing the system seems to throttle back PV generation once grid export hits a certain threshold, even though the inverters themselves are rated for considerably more continuous output.

In my case it's relevant because the garden office draw is fairly predictable, but when the static caravan is empty and the EV isn't charging, virtually everything wants to push back to the grid — and that's exactly when the curtailment kicks in.

My suspicion is this is either:

• Grid export limiting configured in VEConfigure or via the DVCC settings on the Cerbo GX
• MPPT throttling — the 450/200s will back off harvest if the system has nowhere to put the power
• A DNO export limit baked into the inverter configuration at install time

Worth checking your ESS assistant settings if you're on Victron — there's a Maximum feed-in power field that might be set lower than your theoretical combined output. Also check whether Limit inverter power is ticked.

On a three-phase setup the maths gets a bit murkier because the export measurement is taken across all phases, so even if individual phases look fine the aggregate trips the limit.

Has anyone managed to properly tune this on a large parallel string without compromising the MPPT behaviour? Curious whether Fogstar or other battery configurations affect how aggressively the system curtails.

Classic Victron parallel export limiting — when you've got multiple units networked via VE.Can, the ESS Assistant throttles total grid feed-in once you hit your DNO's export cap, splitting the curtailment across all inverters proportionally.

@PennineVanLifer — key things to check:

• Grid feed-in power setting in VE.Configure (per-unit, so multiply accordingly)
• All units running identical firmware — mismatched versions cause absolute chaos with parallel limiting
• Your grid meter is properly configured in Venus OS, otherwise the system's guessing

Had similar grief with my motorhome shore power setup before realising Venus OS was reading phantom export figures. The 13.8kW curtailment point sounds like a DNO G98/G99 agreement limit rather than a Victron fault — worth double-checking your export licence paperwork before chasing a firmware rabbit hole.

Good point from @MarineGeoff on the ESS Assistant, but worth adding — the Grid Setpoint and Maximum Feed-in settings in VEConfigure are where you'll actually dial this in per-unit.

With three Multiplus-II units in a three-phase parallel setup, the export limiting is coordinated through the Cerbo GX (or Venus GX if older). Each inverter receives its curtailment signal proportionally — so if your DNO limit is 13.8kW across all phases, the Cerbo divides that headroom dynamically.

Key thing to check: are all three units on the same VE.Can network and showing as a single system in VRM? If they're appearing as separate devices, the limiting logic breaks down entirely and you'll see exactly the erratic curtailment behaviour described in that German thread title.

Also confirm your CT clamp positioning — it must be on the grid side, not between inverter and load.

Good points from @MarineGeoff and @DodgyRoamer on the ESS side of things.

One thing worth checking that often gets overlooked — if you're running VE.Bus alongside VE.Can, the export limiting logic can sometimes conflict between the two communication layers, particularly with older firmware. Had a similar headache on my boat setup before I standardised everything to VE.Can only.

Also worth verifying your DVCC (Distributed Voltage and Current Control) settings in Cerbo GX — if SVS and SCS aren't aligned across all three units, the phase compensation calculations can behave unexpectedly under load, which manifests as premature curtailment well below your actual configured maximum.

What firmware version are your Multi/Quattros on currently? There were some meaningful fixes to parallel export limiting behaviour around the v497-v502 range that might be relevant here.

Great thread this. One thing I'd add to what @MarineGeoff, @DodgyRoamer and @AshChild have already covered — have you checked whether your DNO has imposed an export limit on your connection agreement? In the UK, particularly with G98/G99 compliance, your DNO can stipulate a maximum export figure, and if you've got an energy meter fitted at the grid connection point, the system will throttle back accordingly regardless of what you've set in VE Configure. Worth pulling up your connection agreement paperwork if you've got it. Sometimes the limit gets baked in during commissioning and people forget it's there. What size connection are you on, @PennineVanLifer — single or three phase?