Hello,
I am trying to build an ESS system for an existing Fronius inverter.
To start with, the devices I have:
2x Victron Multiplus II 48/5000 / 70-50
1x Victron Multiplus II 48/3000 / 35-32
1x Fronius Symo 5.0
1x Victron Cerbo GX
Location: Germany
Connection diagram in the attachment.
I have not yet connected devices via VE.BUS, as the system rejects Multiplus 3000, I probably need to update the Firmware, which I will do on Sunday.
But what worries me I have set the Grid standard Germany with internal NS protection and the inverter throws error 8.
After updating the Firmware (I updated both Victron 5000), the float is on and the bulk is blinking.
I tried different setups and sometimes Grid Austria worked, sometimes Australia, but no rule. For example, on the Europe setting, it does not work at all.
When set to None it works fine, but ESS Assistant requires Grid Code to be set.
I was observing the Grid parameters and the voltage oscillates around 235-240V and the frequency 49.8-50.1 Hz, so it seems ok.
Is there any mistake in the wiring diagram that could cause Victron errors?
I will be grateful for every tip.
I will add that I do not need 3 phases. The Victron 3000 is only there so that you can use all your energy with Fronius. All devices that I have at home are powered by 230V.
Best regards,
Bartek.
P.S.
Sorry for my English, I hope it is understandable.
