UPDATE - Tigo seems to have an advantage over SolarEdge in this heavy shading scenario.
I believe what he is saying is accurate. I haven’t used optimisers before, but I understand that it is true regarding needing a number of panels to produce power for the inverter to function.
I guess the logic that if you have heavy shading then you should use micros is probably fair also. Although, if your shading is that bad, are you sure you’ll get enough sunlight for solar to be worthwhile? Is the supplier able to give you an idea of the output of the system, and what impact the shade will have?
Cheers
Marty