Some info on what City of Cape Town has been doing regarding feeding back into the grid, for single phase users (hint, not much). As for three phase – nothing..
WDC_project_048

Info on why net generators get charged a base fee (NERSA!), why council has been dragging their feet on renewables, feeding back, and other issues (by the very helpful Brian Jones) –
Brian Jones_Challenges to get RE going in municipalities_CoCT

Latest SSEG application form Grid tied form SSEG