Frequency shifting ports for EG4/Luxpower/Sol-Ark - not identical?

[Cmiller]

Thanks for that technical info on the reason for AC coupled limitations. What Fronius inverters do you use that can frequency shift in an AC coupled system?

I have a Fronius Primo single phase inverter. But my Victron battery based inverters create the "micro-grid", and the Fronius Primo just follows that frequency. But when the Victrons shift the frequency up, then Fronius knows to curtail it's power output.