A recently completed UK install, House & EV Charging PowerBoard.
Simple Grid connected Single Phase ESS with UPS backup to critical loads, Hot water Diversion and EV Charging. G99 Fastrack Route with G100 Export Limitation.
It’s really well built and offers a good mix of DC and AC PV …
But why isn’t the Fronius connected to the AC Out on the Multis? Perhaps you could switch the Fronius to the AC Out using a changeover switch in case of an emergency or power cut…
Yes absolutely, plan to utilise the benefit of the Victron & Fronius AC Coupling MG50, particularly beneficial during winter when power cuts are more likely, all the solar generation helps!
Having a study of the setup procedure and will be implementing it next week. Our first time doing true AC coupling with Victron creating micro grid.
Very nice but far from a simple single phase system lol, no issues apart from following the 1to1 rule with the size of the PV system and just make sure frequency shift is working but don’t think you would have any issues as the intergration is better than my Solis but that works great and frequency shifts too
I would definitely install the PV Assistant, even though the Fronius control system works brilliantly via the MG50. In the event that the control system does happen to fail, the Fronius reacts to the frequency boost from the Multis at the AC Out and regulates itself down accordingly. That’s why the Fronius can run continuously at the AC Out without any problems. The conditions for the 1:1 rule are, after all, met
@PeakShaving is operating it in ESS both PV and ESS should not be installed as ESS handles the PV system, the System is given over to ESS it controls the lot. I run two Solis inverters as long as the AC inverters frequency shift and the 1 to 1 rule observed it doesn’t matter what AC solar inverter you use cavet to using other inverters is you need either ET112 VM3P75CT or similar to register there input power to the Victron system other than that it’s all the same and would continuously run on AC out during grid down until Victron systems says batteries are full et cetera
That’s true, of course … The newer version of the ESS already includes full support for AC-coupled inverters. You’ll also need to specify the installed PV capacity and inverter capacity here.
@Daza@Netrange thanks for the feedback and guidance. Look forward to implementing this.
Have some other new projects where their is existing non -fronius inverters for solar PV and wind. Good to know that Solis & others can frequency shift too.
Must investigate if Hypontech Solar PV Inverters and Orbital DVE Wind Inverters can work.
@PeakShaving if the Hypontech is ENA compliant then it should but who knows as there has been a lot of things coming to market that hmmmm is all I’m going to say
It’s really well built and offers a good mix of DC and AC PV … 
Perhaps you could switch the Fronius to the AC Out using a changeover switch in case of an emergency or power cut…
The newer version of the ESS already includes full support for AC-coupled inverters. You’ll also need to specify the installed PV capacity and inverter capacity here. 
is all I’m going to say