In the same boat, thanks for asking the question so we could get some definitive information. Probably the biggest trap seems to be the grid tied inverters, which aren’t particularly useful for “our” purposes.
So likely at least R50k is my estimate just for the inverter - Deye 12kw 3 Phase - Which is a stark contrast to 3 Axpert clones, although consideration to be applied to additional ancillaries required.