We finally found the problem. It seems like the inverter draws from the grid on the smartload - this has something to do with reactive power. I took the geysers off the smartload and the system is working perfectly.
Hi,
I have installed 2 x 12kVa 3 phase Deye inverters connected in parallel. Even though I have ample solar genration, it still draws power from the grid. Load first is enabled. I would really appreciate any advice on minimising the grid usage. Thank you.