I am very happy that my new inverter has finally been linked to the old inverter ( 4 days ) and it now responds as one 'plant'.
I am seeing none of the reported issues with one inverter discharging more than the other, and none of the issues of excess export to grid.
It is working like a dream.
Meaning I can boil a kettle or cook dinner without hitting the grid!
I am really very happy right now.