Renewable Energy Projects: AES Andes' 560MW Molten Salt Energy Storage Project gets Green Light

published on 01 April 2024


In an exciting development for renewable energy, AES Andes has received the green light for a groundbreaking 560MW molten salt energy storage project in Chile. This project signifies a major leap towards sustainable energy solutions, transforming an existing coal plant into a beacon of renewable innovation. Let's dive into the details of this transformative venture and its implications for the future of energy storage.

A Pioneering Transition:

The Alba project aims to repurpose the 560MW coal-fired Angamos power plant in Mejillones into a state-of-the-art renewable energy storage and generation system. This innovative approach involves using molten salt technology to store and release thermal energy, a method that promises high efficiency and long-duration energy storage capabilities. With a substantial investment of US$450 million, this project is poised to set a precedent for converting traditional power plants into sustainable energy hubs.

Advancements in Energy Storage:

The core of the Alba project lies in its cutting-edge energy storage technology. The system utilizes salts heated to temperatures between 310-560°C, which then transfer their stored thermal energy to generate steam and power a turbogenerator. This method not only offers a sustainable alternative to fossil fuels but also boasts a potential discharge duration of 10 hours, translating to a remarkable 5,600MWh of energy storage capacity. The involvement of leading long-duration energy storage companies further underscores the project's commitment to pioneering solutions.

Chile's Bright Future in Renewables:

Chile's push for renewable energy is exemplified by the soaring energy storage market, driven by solar curtailment and supportive government policies. The northern Atacama desert region, known as the 'sunniest place in the world,' is becoming a hotspot for solar PV projects paired with energy storage. Recent initiatives, such as Grenergy's 4.1GWh BESS project and SUSI Partners' solar-plus-storage developments, highlight the country's ambition to become a global leader in renewable energy.


The approval of AES Andes' 560MW molten salt energy storage project marks a significant milestone in Chile's journey towards a renewable energy future. By repurposing existing infrastructure and embracing innovative storage technologies, this project exemplifies the transformative potential of renewable energy initiatives. As Chile continues to harness its abundant solar resources, projects like Alba pave the way for a sustainable and resilient energy landscape.

The above analysis is proprietary to Enerdatics’ energy analytics team, based on the current understanding of the available data. The information is subject to change and should not be taken to constitute professional advice or a recommendation. 

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