Hi @johnyma22 I have emailed Victron but didn’t get a response. I was completely stuck until I realised what the issue was. And later when I made some minor adjustments, and everything went wrong again, I still hadn’t made the link. Then the penny dropped. If you so much as download the configuration file, without making any changes, you will have to reboot - very odd behaviour.
Also see here: Is a PV meter required for an ESS system? - #13 by teejay
Remote restart doesn’t work. You must shutdown at the devices and wait 15 seconds for capacitors to discharge. Then reboot.
I think your system is configured the same as mine and I too was going to select PV Coupled on AC Input 1 - but that didn’t work. Having said that it could be that I hadn’t shut down and rebooted. The settings that I have shown are directly from my working system.
I have 4kW of solar connected to an SMA inverter which connects to the consumer unit. For the CT loop connection in the Consumer Unit (CU) I use a Wago connector to join a wire to the incomer and loop it through the CT and back to the CU connection. This also makes it easy to test the right direction through the CT.
Then I just use AC1 for in/out on the inverter. My connection wire from the CT to the Multiplus was about 15m long and it worked. I have reduced the length now to about 5m for tidiness.
I would be interested to hear how you get on. As will others who come along later.