Hi folks!
First of all, I love my new Victron setup. Great products!
I have tried to search for an answer, but I have not managed to find any other solutions to my challenges.
I guess I have a rather unusual setup of my four 48/5000/70-50 Multiplus ii. As seen in my attached image, they are connected in split phase 120 degrees on a IT based grid system (Norway). This is a three phase system with no neutral and 230V between phases, and as far as I know there are only a few countries in the world that got this grid system.
Everything on the system is connected on AC IN. (PV, load and Grid)
My challenge is two/three folded:
- The L2 phase is connected to all four inverters and gets a lot more of the current share, as it is common. This makes the setup very unbalanced. Not sure if there is any other way to connect Multiplus to an IT-net with proper phase distribution. Any suggestions?
- In my system I also got a Solar inverter connected to AC IN that can reach up to 10kW. If both the Solar inverter and Multipluses outputs at max capacity the sub panel breaker will blow. (Red circle in the image) Is there any way to limit the combined output of the inverters and the solar inverters? The solar inverter should not be limited, so the Multipluses must adjust according to the Solar output.
- This is sort of related to the last bullet, and will probably have the same solution. As the phases are unbalanced, and L2 gets more of the load, is there any way to monitor L2 with a CT to limit the export/import power if the phase exceeds 63A? (Red circle in the image)
(The only solution i could think of now is using node-red with some external CTs connected to shelly, Iotawatt or something similar. The node-red setup is probably a bit fragile, so would like something more solid.)
I am not an expert in this field, so please ask me to clarify if I have used the wrong terminology or if anything is unclear.
I would really appreciate if anyone have the knowledge to help med out here.
Thank you for your help in advance!
