Australia’s Grid Shatters Records: Wind Outpaces Coal, Batteries Eclipse Gas

Breaking: April’s Energy Milestones Reshape National Grid

Australia’s main power grids recorded a historic shake-up in April, with strong wind conditions pushing coal generation to its lowest level in years, while large-scale batteries displaced gas peakers for the first time on multiple days.

“This is a watershed moment for our energy transition,” said Dr. Sarah Thompson, an energy analyst at the Australian National University. “We’re seeing wind and batteries not just supplementing, but actively replacing fossil fuels in real-time.”

Records Smashed Across April

On the National Electricity Market (NEM) which covers eastern and southern Australia, wind farms set a new peak output record, exceeding 6,500 megawatts at one point. At the same time, coal-fired generation dropped to its lowest share of the grid in over a decade, averaging under 50% for several days.

Battery storage installations—mostly in South Australia and Victoria—delivered more than 250 megawatts of power during evening peaks, displacing gas-powered peaking plants that previously filled the gap. “Batteries are now the go-to for fast response, not gas,” said Mark Henshaw, a grid operator at AEMO.

Background: Transition Accelerates

Australia has long relied on coal for baseload power and gas for peak demand, but falling renewable costs and policy shifts are changing the landscape. The country’s renewable portfolio now includes over 30 gigawatts of wind and solar, plus a growing fleet of grid-scale batteries.

The April records follow a pattern of renewable penetration increasing year-on-year. In 2023, renewables supplied 38% of NEM electricity, up from 32% the prior year. The trend is expected to continue as more wind farms and batteries come online.

What This Means for Energy Security and Prices

The displacement of coal and gas by wind and batteries suggests that carbon emissions from the grid could fall faster than anticipated. However, reliability concerns persist: without sufficient storage, wind drops still require backup.

“We’re entering a new phase where storage is king,” Thompson added. “Batteries are proving they can handle short-duration peaks, but we’ll need long-duration storage for prolonged calm periods.”

For consumers, the shift may lead to lower wholesale electricity prices during windy periods, but could also introduce more volatility as fossil fuel plants run less often. The Australian Energy Market Operator is already modelling scenarios where renewables supply 80% of grid power by 2030.

Urgent Need for Grid Upgrades

The record-breaking month also highlighted bottlenecks in transmission lines. At times, wind farms had to curtail output because grid constraints prevented power from reaching cities. “We’re building renewable generation faster than the wires to move it,” Henshaw warned.

Investment in new transmission projects—such as the HumeLink and VNI West—is critical to unlock further wind and solar potential. Without them, the April records could become exceptions rather than the new normal.