@braaimaster_gp, Agreed with @solarguy_pta. Also run a 7-day data logger on your incoming Ekurhuleni 3-phase supply before quoting. Half the workshops we audit in Germiston have terrible phase imbalance that needs redistributing before a 3-phase hybrid inverter goes in, and your insurer will insist on a supplementary SANS 10142-1 CoC signed off by a registered installation electrician.