Dear Community,
I have an issue with commissioning Victron System. It is an ESS systems with DC coupled solar system with the following:
- MultiPlus II 48/8000/110-100
- MPPT RS 450 200
- Cerbo GX + Touch
- BYD BMU
- 8 5kWh LV Flex Lite
- normal protections with by pass change-over switch
So, I programmed the system in ESS (Battery Optimized) mode with all parameters checked... When the system is working in Off-grid mode (UPS mode) it is working fine. However, the problem I am facing is when I switch on the grid... the Load shows that it is zero (as per the photo below) and the load power is showing at the Grid side as negative energy (or feeding the grid). When the Grid is on also the load remains on and the battery charge. I switch off the grid feeding option. I think the multiplus II doesnot have current sensor / CT. I did not install it in the system as the grid is directly connected to the Multiplus. I used Output-1 from Multiplus II and Output 2 kept it empty.
It would be great if you can support and advice if the CT is mandatory so that the Multiplus understands what is the power taken from the Grid and adjust the figures in the Cerbo.
