> As far as I understand it, you can’t have power generated by solar panels feeding loads in your grid-connected panel without backfeeding the grid, same deal as a generator backfeeding a grid-connected panel. You have to kill the MCB or service disconnect to prevent backfeeding.
An inverter can limit its output, right? So measure current at a few different points in the system, do some math, and use that to set the inverter's limit.