Just saw this comment from @dognose in the beta section.
I tried it and with this Node-RED function:
I was able to change it to zero feed-in and the phases are still compensated. The solar connected to the Multi RS went into the battery. The other connected SMA Tripower wasn’t reduced, so I changed it to 1% and the Multi RS was keeping the grid point around 0.
But when the battery was 100% the it was consuming around 100w / 180w from the grid. Grid setpoint set to 0.
I also have 1 multi rs on 3f grid connection. Only connected on ac-in.
Beta version v3.80~33