Your total energy demand figure for SA is incorrect. For 29/7/2019 (midnight to midnight), total energy demand was 34,700 MWh. (Go to https://www.aemo.com.au/

Your total energy demand figure for SA is incorrect. For 29/7/2019 (midnight to midnight), total energy demand was 34,700 MWh. (Go to https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data-dashboard#aggregated-data https://www.aemo.com.au/Electricity/National-Electricity-Mar... and download the SA data for Current Month. Divide the TOTALDEMAND in each half hour settlement interval by 2 to get MWh, then add them up for 48 intervals for the day in question.)