The Australian National University declares baseload power functionally extinct due to the rise of renewables. This blog explores how solar and battery storage are reshaping energy markets, making traditional coal and nuclear plants unprofitable and obsolete.
Recently, the Australian National University announced that baseload power is functionally extinct. Traditionally, baseload power has been supplied by coal, nuclear, and gas plants, but this landscape is rapidly changing. In this blog, we will explore the implications of this shift and how renewable energy sources are reshaping the electricity grid.
To grasp the significance of this change, we first need to understand what baseload power is. In utility grid management, there are three types of load:
Historically, coal has been the primary source of baseload power in Australia due to its low cost and slow ramp-up capabilities. Nuclear power, while providing stable energy, is even less flexible and is not the main source of power in most countries.
Nuclear power plants can be turned off, but doing so significantly shortens their lifespan, making operators reluctant to shut them down. This rigidity complicates grid management, especially as renewable energy sources like solar become more prevalent.
As solar energy production increases, particularly during midday, prices for electricity can drop dramatically. This phenomenon, known as the duck curve, occurs because solar energy has no fuel costs, leading to a surplus of energy when demand is low. Consequently, baseload generators often find themselves operating at a loss during these hours.
In regions like South Australia, the transition to renewables has already led to significant changes. For instance, in the last week of winter 2024, South Australia achieved over 100% net renewables, primarily from solar energy. This shift has rendered the last coal-fired power plant in the region obsolete, having shut down in 2016 after years of limited operation.
The rest of Australia has not yet reached this level of renewable integration, but the trend is clear: the economic viability of coal is diminishing rapidly. As solar uptake continues to grow, the need for traditional baseload generation is becoming increasingly questionable.
Energy storage plays a crucial role in this transition. When renewable energy sources produce excess energy during the day, it becomes essential to store this energy for later use. This process, known as firming, involves pairing variable renewables with storage solutions like batteries and pumped hydro energy storage.
As more storage solutions come online, the economics for baseload generators worsen. Energy arbitrage, where energy is bought at low prices during the day and sold at higher prices during peak demand, is becoming a profitable venture for companies investing in battery technology. Tesla, for example, utilizes its mega packs to capitalize on this strategy.
The future for coal, nuclear, and gas power plants looks bleak. With the rise of battery storage and the decreasing costs of renewable technologies, baseload generation is becoming less and less viable. The trend indicates that baseload power is not just endangered; it is already functionally extinct.
Power-hungry data centers are also contributing to this shift. As they face planning roadblocks due to high energy consumption, some tech companies are considering commissioning nuclear reactors to meet their energy needs. However, this approach does not necessarily translate to a broader application for utility grids, as the challenges of nuclear power—such as long build times and high costs—remain significant.
The Australian National University has highlighted a critical turning point in energy production: the operational paradigm is shifting away from baseload and peaking power. As competition from renewables accelerates, coal power plants are retiring faster than anticipated. The market is evolving, and the traditional reliance on baseload power is being replaced by a more dynamic and flexible energy landscape.
In summary, the rise of renewables and energy storage is reshaping the electricity grid, making traditional baseload generation increasingly unprofitable and obsolete. The future of energy lies in adaptability and innovation, as we move towards a more sustainable and efficient energy system.
