The energy transition today faces an obvious paradox: while renewable generation—especially solar—is growing rapidly, large amounts of this clean energy are being lost due to limitations in the power grid. In Chile, so-called “curtailment” of renewable energy—energy that is not fed into the grid—has become increasingly frequent, accounting for more than 20% of the solar and wind energy generated in 2024. This phenomenon reflects structural inefficiencies in energy planning and highlights the opportunity to move toward deep integration among energy sectors through energy storage and conversion technologies.

This approach, known as“sector coupling,” allows for the intelligent integration of the electricity sector with the thermal sector, the transportation sector, and even the chemical and fuel industries. The key lies in deploying storage solutions that not only store energy but also transform it so it can be used when and where it is most needed.

For example, solar electricity that is currently lost during the day could be used to generate heat through Power-to-Heat (PtH) technologies, such as industrial heat pumps or electric heating elements. This thermal energy can power fossil-fuel-intensive industrial processes, reducing direct emissions and operating costs. Chile’s solar potential, one of the highest in the world, offers unique conditions for this strategy.

In addition, Power-to-Gas (PtG) technologies make it possible to convert renewable electricity into green hydrogen, which can be stored, transported, and used in boilers, turbines, fuel cells, or industrial processes. This hydrogen can also be converted into synthetic methane or liquid fuels (PtL), integrating the transportation and chemical sectors without requiring new infrastructure.

Even electric vehicles can be integrated into the system as distributed storage elements through Vehicle-to-Grid (V2G) technologies, in which batteries not only consume electricity but can also feed it back into the grid during periods of high demand.

The result of these interconnections is a more flexible, resilient, and efficient energy system. Curtailment is reduced, grid congestion is alleviated, energy supply and demand are balanced, and the use of renewable energy is expanded beyond the electricity sector.

From a strategic perspective, sector coupling not only improves the technical efficiency of the energy system but also creates opportunities for industrial development and employment. Hydrogen production, the deployment of thermal storage, and the development of synthetic fuels can stimulate new value chains in the country.

To capitalize on these opportunities, a coordinated approach to energy planning is needed that transcends sectoral boundaries. This involves integrating grid infrastructure design, incentives for Power-to-X technologies, flexible regulatory frameworks, and policies that promote investment in multisectoral storage solutions.

Against a backdrop of growing climate ambitions, volatile energy prices, and carbon-neutrality goals, energy storage and cross-sector integration are not a technological utopia, but rather a strategic necessity for achieving a smart and efficient energy transition.