For the first time, renewable energy and storage supplied more than half of Australia's National Electricity Market (NEM) power in the December 2025 quarter, according to AEMO's latest Quarterly Energy Dynamics report. The milestone marks a turning point in Australia's energy transition: renewables hit 51% of the system's energy mix, with coal-fired generation falling to a record low.
The acceleration is real. Australia added 7 gigawatts of renewable capacity in 2025 alone, sufficient to power approximately 2.4 million homes. Rooftop solar alone now provides 12.8% of Australia's electricity generation, with 4.2 million homes and businesses sporting 26.8 GW of solar capacity. Battery storage is booming: large-scale battery capacity additions reached 3,796 megawatts in the year to December 2025, with a record 1.2 gigawatt-hours of small-scale storage registered in February 2026 alone.
This growth is pushing Australia toward the federal government's 82% renewable electricity target by 2030. With renewable generation already at 51% and the development pipeline expanded to 275 projects representing 56.6 gigawatts of generation and storage capacity, the target is increasingly within reach. AEMO's 2026 Integrated System Plan confirms that the renewables rollout remains the least-cost pathway to meeting Australia's energy needs.
The economics are compelling. Wholesale electricity prices in the NEM fell 44% year-on-year in the December quarter, averaging $50 per megawatt-hour, as record renewable generation flooded the grid. Yet this success is masking a critical challenge: the grid infrastructure that balances and transmits this variable power is becoming the bottleneck.
AEMO's projections lay out the infrastructure reality. To reach the 2030 target and sustain growth toward 2050, Australia will need 120 gigawatts of wind and solar capacity, plus 40 gigawatts of grid-scale storage and 6,000 kilometres of new transmission lines. Battery storage is expanding rapidly, with 94 projects in the pipeline comprising 78 standalone batteries and 16 hybrid installations. Grid-forming battery systems, which stabilise voltage and frequency as fossil fuel generators exit, are emerging as essential: 10 are currently operational across the NEM with a combined 1,070 megawatts of output, but 94 more are in development.
The real test of Australia's renewable transition will not be whether generation capacity grows fast enough. CSIRO's latest energy transition analysis confirms that the challenge is systems-level: keeping the grid stable and reliable while moving from 50% to over 80% renewables by 2030. Planning approvals for transmission infrastructure have historically lagged, and the political consensus for meeting this bottleneck is not yet assured. Australia is winning the renewables race. Whether it can keep up with its own success depends on whether governments can move transmission approval and construction at the pace the grid demands.