For the year 2018, Solar energy has positioned itself as an economically viable option to offer energy supply to large cities. According to projections, by 2040, half of all electricity would be locally generated at the same place where it is consumed, marking important progress in the energy transition. This trend anticipates the end of dependence on coal as the main source of electricity generation, especially in countries such as Australia.
The impact of solar energy in Queensland
A recent report from The Guardian He highlighted how, for the first time in history, the price of electricity in Queensland fell into the negative for half of the day. This occurred in an environment where the average price per megawatt is usually between $40-$50. The fall in price in Queensland was mainly due to the emergence of solar energy, especially due to the installed capacity of More than 350.000 buildings with solar panels, providing 1.100 MW of electricity to the system during peak demand hours.
Typically, low energy prices occur in the early morning hours, when demand is lower. However, solar energy defied this pattern, reducing prices at midday when coal-fired generators would normally make higher profits. This resulted in many coal-fired generators failing to make significant profits throughout the year.
According to Prime Minister Tony Abbot, Australia has been considered a land of cheap energy, thanks to its abundance of coal. However, the real problem lies in the high distribution costs and energy taxesThis has encouraged Australians to increasingly opt for self-sufficiency solutions such as solar panels.
Projections for solar energy adoption in Australia
The cost of installing solar panels, together with the benefits of self-sufficiency, has led to a projected exponential growth in the adoption of this technology. By 2023 and 2024, it is expected that the 90% of businesses y 75% of homes in Australia equipped with solar panels. This trend will be accompanied by storage systems (batteries), which will allow residential users to store energy and avoid losses due to unused surpluses.
Unlimited access to solar panel installation, coupled with the availability of battery storage, allows consumers to consider the possibility of disconnect permanently from the electrical gridIn remote areas, where electricity distribution costs are high, this solution is particularly viable. Even in large cities, this transition is seen as economically feasible, and is anticipated to be possible in the near future.
The challenge of a possible oversupply of solar energy
Despite the progress, the massive growth of solar energy also poses challenges. One of the main problems is the risk of overloading the grid during times of low demand, something that, according to the Australian Energy Market Agency (AEMO), could destabilise the system. A clear example of this was experienced in the state of Victoria, where, in a sunny weekend day By 2024, rooftop solar panel production will see a massive increase, reducing grid demand to dangerously low levels.
To avoid grid disruptions, AEMO implemented several emergency measures such as temporarily disconnecting solar panels and limiting the discharge of surplus energy. In addition, battery owners were notified to keep them empty to absorb excess solar energy.
Although these types of situations represent a challenge, they also show the need to move forward in the Smart management of energy surplus and in adapting the grid infrastructure to cope with the increasing penetration of renewable energy.
One of the main problems with solar energy is that its production is intermittent and does not always coincide with peak demand. Therefore, a flexible generation and storage system capable of take advantage of excesses during times of low demand and release them when demand is higher. The installation of large scale batteries, both at residential and industrial level, is one of the solutions proposed.
With the accelerated adoption of renewable energy in Australia, it is expected that in the near future the Solar production covers up to 70% of the country's electricity needs, on days of greater solar radiation. This would make Australia a world leader in clean energy, and would move it away from its historical dependence on coal.
The rapid growth of rooftop solar and investment in large solar farms positions Australia as a key destination for renewable expansion. However, it will be crucial to continue optimizing its electricity grid to handle the increasing volume of solar energy and to more efficiently deploy renewable energy solutions. storage solutions that allow greater flexibility of the electrical system.