There’s a paradox running through the energy transition: the planet’s most inhospitable areas could turn out to be the most strategic sites for its future. In fact, deserts are undergoing a transformation into a gigantic natural infrastructure capable of producing clean energy in quantities scarcely imaginable anywhere else.
In the Sahara and in California’s Mojave desert, on the Arabian Peninsula and in the Australian outback, the sun beats down on the surface of the earth with unrivalled force and relentlessness. Some scientific estimates claim that a relatively modest portion of the Sahara could, in theory, cover the entirety of the world’s energy needs. It’s not just a question of abundance, but of resource quality: solar radiation is stable, predictable, and allows for far more efficient production than in temperate latitudes. Here, the sun ceases to be a mere source and becomes energy raw material of continental proportions.
Vast power substations in the desert. The revolution is already underway. In Morocco, the Noor Ouarzazate complex uses concentrated solar technologies to produce energy even after sundown, thanks to thermal storage. In the Mojave desert in California, plants such as the Ivanpah facility represent one of the first large-scale industrial applications of thermodynamic solar (thermodynamic solar plants are hybrid systems that serve to produce hot water using a renewable source like solar energy).
Bhadla Solar Park in India is one of the largest photovoltaic plants in the world, while the Mohammed bin Rashid Al Maktoum Solar Park in the United Arab Emirates is continuing to expand in pursuit of record capacities.
These facilities are not simply electrical power stations, but technological platforms experimenting with increasingly efficient production models, integration with storage systems, and solutions for managing the variability of solar as a source.
Sun Cable: energy beyond borders. The most radical leap forward in terms of scale takes the form of projects like the Australia-Asia Power Link, also known as the Sun Cable. The idea is as simple as it is revolutionary: building the world’s largest solar power substation in the Australian desert, storing the energy produced in giant battery systems, and transmitting it across distances of thousands of kilometres.
The link in question, a high-voltage submarine cable of around 4,200 kilometres in length, will even bring energy to Singapore, with the aim of covering up to 15% of the city-state’s electricity requirements. With this, energy is shedding its local nature. No longer bound by the need for proximity between production and consumption, it can become a global commodity
to be transported, exchanged and integrated between different continents, marking the birth of a new geography of electricity.
The technological key: storage and transmission. The real limitation when it comes to this type of plant is no longer the production of energy, but its management. The sun is not always available when needed, and deserts are often far from major consumption centres. This is where two key factors come into play: storage and transmission. Latest-generation batteries and thermal storage systems make it possible to conserve energy for hours, or even for days. The real cutting edge, then, consists of transmission: HVDC technologies (high-voltage direct current) make it possible to transport immense quantities of energy over enormous distances, with minimum loss. Between submarine cables, transcontinental interconnections and smart grids, electrical infrastructure is the backbone of the transition.
