Energy miracle shocks the world

Australia is once again proving that the energy transition doesn’t have to remain just on paper. By the end of 2025, the state of South Australia found itself in a position that many analysts considered technically risky just a decade ago.

The power grid there is now capable of operating almost entirely on wind and solar, with stability maintained by batteries and new interconnectors. The result is not only a greener energy mix but also a noticeable shift in market dynamics.

According to data from the Australian Energy Market Operator (AEMO), South Australia reached record levels of renewable generation in the fourth quarter of 2025. The growth of wind farm capacities, widespread installation of rooftop solar panels, and the rapid rise of utility-scale batteries have fundamentally transformed grid operations. While the region was heavily reliant on gas in the past, it is now practically self-sufficient at many moments thanks to wind and photovoltaics.

Almost Entirely Green Electricity

One of the most significant milestones occurred on September 10, 2025, when a combination of wind and solar covered 98.7% of domestic electricity production. In other words, nearly all consumption at that moment was met without fossil fuels. In November of the same year, the situation went even further: renewables exceeded 157% of local demand during a morning of strong winds. The excess energy was either exported to other states or stored in battery systems.

Across the entire National Electricity Market (NEM), the share of renewables reached 51% in the fourth quarter—a historic milestone and a jump from 46% during the same period the previous year. This growth was no accident. Australia is systematically investing in wind farms, solar projects, and decentralized photovoltaics. Rooftop panels, in particular, play a key role, covering more than 60% of grid demand during certain intervals.

These extreme scenarios also manifested in "negative demand." At certain points, net grid withdrawals dropped to minus 263 megawatts, meaning households with their own generation were feeding more energy into the system than was currently being consumed.

Batteries as a Stability Guarantee

The linchpin of this transformation is storage. Today, Australia has over 145,000 home batteries installed, with a total capacity of approximately 3,400 MWh. Alongside these, large-scale battery projects are being added to absorb surpluses during wind and solar peaks and release the energy back into the grid during times of higher demand.

Recently, nearly 3,800 MW of new utility-scale battery capacity was added, with storage exceeding 8,600 MWh. As a result, their average charging/discharging power has nearly tripled. This is a game-changer: the grid is more flexible, less sensitive to short-term fluctuations, and less dependent on gas-fired plants as quick-start backups.

"Increased wind, solar, and battery capacities reduce reliance on expensive gas and coal generation, creating a sustained cushioning effect on wholesale prices," said Violette Mouchaileh of AEMO. According to her, the 51% renewable share across the NEM is clear evidence that long-term investments in clean energy are beginning to show systemic results.

A Global Trend, Not an Isolated Experiment

Developments in South Australia fit into a broader global context. The International Renewable Energy Agency (IRENA) points out that in 2024, new solar projects were, on average, 41% cheaper than the most affordable coal alternatives, while wind projects were up to 53% cheaper. Renewables are thus becoming not only the ecological choice but the economically dominant one.

Similar phenomena are being observed in Europe. In 2025, both Germany and Spain recorded hundreds of hours where wind and solar production exceeded demand to such an extent that the system operated with zero or negative prices. This is a clear signal that a high share of renewables is no longer an experiment, but the new standard for advanced energy markets.

Source: https://fontech.startitup.sk/