Western Australia’s energy transition reached a major milestone at the end of 2025, with renewable sources supplying a record 52.4 per cent of the state’s electricity over the final quarter of the year — the highest contribution ever recorded.
A report by the independent Australian Energy Market Operator (AEMO) confirmed the new record, which surpassed the National Energy Market average of 51 per cent for the same period.
The achievement caps off a year in which renewable energy rapidly replaced coal and gas generation across the grid, driving down wholesale energy costs for Western Australians.
The AEMO Quarterly Energy Dynamics Q4 2025 report shows that plentiful spring-time renewable generation, supported by battery storage and gas, helped deliver lower-cost energy across the state.
Output from coal fell by 5.8 per cent and gas generation by 16.4 per cent during the quarter, replaced by cheaper renewable and storage options — resulting in a 32 per cent quarter-on-quarter fall in wholesale prices.
A growing fleet of large-scale batteries, backed by the WA government, is storing excess renewable power during the day for use during high-demand evening periods.
The initiative forms part of the government’s broader strategy to reduce reliance on fossil fuels while diversifying the state’s economy through clean energy investment.
Energy and Decarbonisation Minister Amber-Jade Sanderson said the results demonstrate the real-world impact of the government’s renewable energy strategy.
“This is our energy transition in action,” said Sanderson.
“AEMO’s independent report shows the progress we have already made supporting new investments in renewable generation and battery storage.
“Backed by gas, this will see the lowest cost energy mix that will drive WA’s clean energy future.
“The Cook government will continue to pursue the sensible and pragmatic policies needed to build on these outstanding results — to deliver affordable and reliable energy for WA households and businesses.”
