We have a setup that includes 3 x Multiplus running in parallell on 3-phase and an AC coupled Fronius Symo. Grid-Feed-In is not permitted so for the past 12months+ it has been running with a Fronius Smart Meter.
One unintended consequence of this design is that it cannot run as an ESS, so the battery sits idle at 100% except when there is no-grid. When the grid drops the Fronius sits on the non-essential side and has been working happily.
We would like to convert the system to ESS so I have purchased a Carlo Gavazzi EM530 and plan to connect this to the Cerbo GX using an RS485 to USB cable.
The questions I have are:
- In the new ESS setup if I enable the zero feed-in will the GX do the same job of throttling the power output of the Fronius?
- Can it do this through the existing Ethernet connection between the Cerbo and the Fronius Datamanager?
- I assume the Fronius Smart Meter will be redundant?
- Without the Smart Meter can the system still talk to the Fronus SolarWeb portal?
Happy to answer questions, provide info. Q 1 & 2 are the essential ones.
Thanks so much in advance. I sometimes find it tricky answering these kind of questions from manuals and building confidence, so this kind of help is so useful.
