Australian state’s utility-scale solar tops 1 TWh in December

The latest data from Rystad Energy shows that Australia’s large-scale solar and wind assets generated a total of 5,420 GWh of clean energy in December 2025, up 19% from the 4,551 GWh generated in the same month a year earlier.

Rystad Senior Analyst David Dixon said New South Wales (NSW) clean energy assets led the pack, generating a total of 1,678 GWh of renewable electricity, with 1,052 GWh from utility PV and 626 GWh from wind.

Dixon said the NSW result marked a first for Australia’s energy market with December 2025 the first time any state has generated more than 1 TWh from utility solar on a monthly basis.

December 2025 was also the highest month of renewable generation in the National Electricity Market (NEM) with 9.5 TWh, or 50.4% of total generation. It was also the highest month of renewable generation in Western Australia’s Wholesale Energy Market (WEM) at 1.07 TWh, or 53.9% of total generation.