Battery storage: The missing link in the renewable energy transition – and Chile’s chance to lead

In February 2025, Chile, long celebrated as Latin America's renewable energy champion, faced a sobering reality. A nationwide blackout left 90% of the population without power for nearly seven hours. For a country that has built its reputation on rapid clean energy deployment, the incident was a stark reminder that even with such admirable progress, generation alone is not enough to sustain a renewable future.

Fortunately, the missing link is no mystery; energy generated must be stored, and Battery Energy Storage Systems (BESS) is the technology poised to bridge the gap. Chile's success in renewables is no accident. It is the product of a unique combination of long-term political and economic stability, an investor-friendly regulatory framework, and some of the world's best solar and wind resources. These advantages have seen the country emerge as a global reference point for clean energy deployment, but now the country must look to bolster its progress to ensure both its sustainability and reliability.

The pace of renewable integration, combined with the country's complex geography and a traditional transmission system which was not designed with the flexibility needed for such high levels of intermittent generation, has exposed vulnerabilities. Transmission bottlenecks, regional imbalances between supply and demand, and frequency stability issues have become recurring themes. The infamous blackout was the most extreme example yet. While expert analyses explain the complex dynamics and interplay of numerous factors, the key lesson is clear. To fully realise the potential of renewables, Chile needs a more flexible, fast-responding buffer between generation and consumption.

While studying the Chilean example offers valuable lessons, the large-scale grid issues are a varied phenomenon. The likelihood of which, in theory, is small, given the extreme conditions necessary to trigger them. And yet, recent history demonstrates that similar events, varying in scale, might not be as rare in reality. The Iberic Peninsula or the Czech Republic being among the more significant examples, and grid resilience is the common denominator among such events.

Why is BESS the answer?

Battery storage offers the potential to improve the grid’s flexibility and resilience, with two key transformative capabilities. Primarily, smoothing out variability, absorbing excess solar and wind power when conditions are optimal and releasing it when generation drops. Secondly, it provides critical grid services: frequency regulation, voltage support, and reserve capacity. These services enable a grid that is capable of keeping the lights on, even in moments of system stress.

In the past, cost has been the main barrier to large-scale adoption. Today's reality, however, is a skyrocketing demand, both in Chile and other markets around the world. The year-on-year double-digit CAPEX reduction rate (lithium-ion systems) creates ever more opportunities for new project development.

BESS is ready to step up, and nowhere in Latin America is the case for adoption stronger than in Chile. At Limes, we recognised Chile not just as a leading market, but as a proving ground for the region. Our development pipeline now includes over 500 MW of BESS capacity. Projects like Pradere Larga (84 MWp PV + 90 MW BESS) – recently awarded its Environmental Qualification Resolution (RCA) – and BESS Huañil (200 MW) are designed to operate at the cutting edge of efficiency and reliability. Early-stage developments such as BESS Pimiento (100 MW) and BESS El Ganso (150 MW) will further expand the country's storage backbone.

Storage's opportunity extends beyond Chile's borders. Latin America is undergoing a profound shift. Once viewed by global investors as politically uncertain and geographically peripheral, the region is now a dynamic, attractive proposition: linguistically and culturally connected, rich in natural resources, and home to a highly educated workforce with global ambitions.

Each country in the region sets its own policies and regulatory frameworks, and as such, regions progress at different speeds. This creates a valuable laboratory for learning, allowing markets to adopt best practices from their neighbours and learn from less successful approaches. For international energy developers like Limes, it also means the ability to design a long-term regional strategy based on proven success stories.

While Chile demonstrates that large-scale BESS integration is not only technically feasible but economically compelling, it sets a precedent for the rest of Latin America and potentially for other emerging markets worldwide. The combination of strong governance, favourable regulations, and unrivalled renewable resources makes it the perfect place to lead.

However, leadership will not happen by default. Continued success depends on maintaining the political, regulatory, and financial stability that have made Chile the most attractive renewable energy market in Latin America in the first place. The country must also move quickly to update grid codes, market structures, and operational protocols to fully capture the value that BESS can provide.

The energy transition is a journey with several essential milestones: replacing fossil fuel generation with renewables, building strong infrastructure to allow their connection and integrating flexibility to ensure reliable delivery. Chile has successfully navigated the first two, making it a remarkably successful example of energy transition. The third, deploying storage at scale, is within reach if we see the adoption of BESS successfully implemented.

From Limes's perspective, the path is clear. The arrival of BESS offers a long-awaited solution to the limits of renewable energy penetration and marks a breakthrough moment. And Chile, with its proven ability to attract investment and deliver ambitious energy projects, is ideally positioned to lead Latin America into a new era of clean, resilient, and reliable power.

The Chilean and other similar blackouts need not be interpreted as evidence of the limitations of renewable energy. Rather, they are highlighting the rigidity of the old energy infrastructure systems and providing a guide for investments into building more secure and dependable energy infrastructure for the future. While serving its own needs, BESS deployment in Chile produces invaluable lessons. While BESS, as a key enabler, solves a wide range of urgent needs today, its true potential, within the ever more complex energy ecosystem, remains to be explored and maximized. Remarkable as the BESS technology is in itself, the rapidly developing AI tools and advanced algorithmic battery management systems will further supercharge its capabilities. There remains little doubt that these two powerful technologies are opening doors to the new era of the energy industry.

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