Even before the mission began, during the week of May 18th of this year, there was a clear reason to pay close attention to Australia. The country built its electricity system predominantly on coal-fired power generation, which still accounts for about 43% of the electricity produced. At the same time, it is experiencing one of the fastest energy transitions in the world.
Currently, renewable sources already account for approximately 40% of generation, with solar energy being the main renewable source, representing almost 20% of the electricity produced in the country. Of this total, more than 12% of all Australian generation comes from photovoltaic systems installed on the roofs of homes and businesses, the largest share of distributed solar generation in the world.
In just over a decade, more than a third of Australian homes have acquired photovoltaic systems, a level of penetration unparalleled among major economies. The success of distributed generation, however, has brought with it new operational challenges—precisely those that would become one of the main themes of the meetings held throughout the week and which also find parallels in the current state of the Brazilian electricity system.
To respond to the effects of this rapid expansion, Australia has begun to treat battery storage as a central element of its energy policy, encouraging both large-scale grid-connected BESS projects and residential batteries integrated into virtual power plants, the so-called Virtual Power Plants.
It was in this context that I embarked for Australia, imagining that storage would be the central topic of discussion. This expectation was natural. However, the first meeting of the mission showed that the main lesson would not lie in a specific technology, but in understanding the system that connects and coordinates them all.
The first change of perspective
Our agenda opened at UNSW (University of New South Wales) in Sydney, in a conversation with researchers from different areas of the university and CEEM (Centre for Energy and Environmental Markets). Experts in energy markets, storage, electrical engineering, renewable energy integration, distributed resources, and the social aspects of the transition were gathered.
This diversity foreshadowed one of the main lessons learned that morning: the challenges of the electricity sector could not be examined by a single discipline.
When presenting the university's approach, one of the UNSW representatives used an expression that came to guide my understanding not only of that meeting, but also of the meetings held in the following days: “we take a systems view of the work that we do” We adopt a systemic view of the work we do.
The statement was accompanied by an important explanation. Energy sustains various sectors of the economy and, therefore, cannot be analyzed in isolation.
Research developed by the university connects the electricity sector to transportation, water, industry, digital infrastructure, and social transformations. In this view, the decarbonization of the economy depends not only on replacing generation sources, but also on different systems evolving in a coordinated manner.
This might seem like an intuitive observation. Yet, it contrasts with a significant portion of the energy transition debate, which often focuses on identifying the next winning technology. We discuss which source will be most competitive, which battery will perform best, or which solution will be able to replace a particular asset. These questions are relevant, but they begin with technology.
In that initial conversation, the logic was reversed: first, it was necessary to understand the system's needs; only then would it make sense to define which technologies could meet them.
First the system, then the technology.
This vision became very concrete when the discussion turned to storage. UNSW brings together dozens of researchers working across the entire battery chain, from sourcing materials and developing different chemistries to cell manufacturing, degradation analysis, safety, system integration, and recycling. It would be natural, therefore, for the university to present a specific technology as the great solution for the transition. That is not what happened.
The researchers emphasized that there is no single battery capable of solving all problems. The choice of technology depends on the application, the required response time, the storage duration, the frequency of use, the expected lifespan, and the service that needs to be provided.
A lithium solution might be suitable for a specific short-term need, while another chemistry might perform better in applications lasting a few hours. In other cases, the system might require a response of seconds or minutes, rather than the displacement of large volumes of energy throughout the day.
The relevant question, therefore, was not simply whether the country needed batteries. It was necessary to ask: what problem does the system need to solve?
This shift in the question is more important than it seems. When the debate starts with the product, there is a risk of looking for applications for a previously chosen solution.
When you start by considering the system's needs, it becomes possible to compare technologies, remuneration models, and infrastructure alternatives with greater rationality. Storage ceases to be treated as an end in itself and begins to be understood as a set of resources capable of providing different services.
When the consumer starts operating the network
The same systemic view emerged in the discussion about distributed generation. In Australia, a significant portion of homes already have solar panels, and the adoption of home batteries is also growing rapidly. During the meeting, it was explained that this movement represents more than just the installation of new equipment. It transforms system operation, network planning, commercial relationships, and the very design of the market.
The consumer is no longer just the end point in a chain built to transport electricity in a single direction. They become involved in generating, storing, consuming, exporting, and potentially offering flexibility to the system.
In the expression used during the presentation, the transformation also becomes... consumer led Led by consumers. This includes not only households, but also large energy users, whose decisions can alter how demand is met and how infrastructure is used.
This movement creates opportunities, but also imposes new challenges. A network originally designed to receive energy from large power plants and deliver it to consumers now coexists with millions of small assets connected to the distribution system.
One of the researchers illustrated this transformation with a rather revealing example. He explained that when the expansion of distributed solar generation is not accompanied by the evolution of system operation, there may be times when the amount of energy injected into the grid becomes excessive. In these situations, operators literally need to... “find a way to turn it off, to shut it down” to find a way to reduce or temporarily stop some of this generation to preserve the safety of the operation.
Next, he presented the Emergency Backstop MechanismThis mechanism allows operators to limit and, in extreme situations, interrupt the export of energy from photovoltaic systems when necessary to ensure grid stability. He added that, at certain times, even on a sunny dayHowever, the energy produced by solar panels may no longer be sufficient to power the residence itself, as generation needs to be restricted to ensure the safe operation of the system.
This example encapsulates the depth of the ongoing transformation. In a highly renewable system, producing more energy doesn't always solve the problem. Under certain circumstances, preserving grid stability requires precisely limiting some of that generation.
A few hours later, when the sun disappears, the need for power supply grows rapidly again. At the same time, batteries, electric vehicles, and automation systems can be coordinated to respond to prices, grid conditions, or operational needs.
It's no longer just about building new generations. It's necessary to integrate networks, consumers, data, market rules, and economic signals.
The opinions and information expressed are the sole responsibility of the author and do not necessarily represent the official position of the author. Canal Solar.
